83_FR_20829 83 FR 20740 - Airworthiness Directives; Learjet, Inc. Airplanes

83 FR 20740 - Airworthiness Directives; Learjet, Inc. Airplanes

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 83, Issue 89 (May 8, 2018)

Page Range20740-20743
FR Document2018-09600

We propose to adopt a new airworthiness directive (AD) for certain Learjet, Inc. Models 28, 29, 31, 31A, 35, 35A, 36, 36A, 55, 55B, 55C, and 60 airplanes. This proposed AD was prompted by fatigue cracks initiating in the flap support structure due to repetitive flap loads, which has caused flap nose roller support bracket failure. This proposed AD would require replacement of the flap nose roller fitting, nose roller support bracket, and adjacent rib support structure with more robust components. We are proposing this AD to address the unsafe condition on these products.

Federal Register, Volume 83 Issue 89 (Tuesday, May 8, 2018) 
[Federal Register Volume 83, Number 89 (Tuesday, May 8, 2018)]
[Proposed Rules]
[Pages 20740-20743]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-09600]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0327; Product Identifier 2018-CE-001-AD]
RIN 2120-AA64


Airworthiness Directives; Learjet, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain Learjet, Inc. Models 28, 29, 31, 31A, 35, 35A, 36, 36A, 55, 
55B, 55C, and 60 airplanes. This proposed AD was prompted by fatigue 
cracks initiating in the flap support structure due to repetitive flap 
loads, which has caused flap nose roller support bracket failure. This 
proposed AD would require replacement of the flap nose roller fitting, 
nose roller support bracket, and adjacent rib support structure with 
more robust components. We are proposing this AD to address the unsafe 
condition on these products.

DATES: We must receive comments on this proposed AD by June 22, 2018.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Learjet, 
Inc., One Learjet Way, Wichita, Kansas 67209; telephone: 316-946-2000; 
email: [email protected]; internet: https://www.bombardier.com. You may view this service information at the FAA, 
Policy and Innovation Division, 901 Locust, Kansas City, Missouri 
64106. For information on the availability of this material at the FAA, 
call (816) 329-4148.

Examining the AD Docket

    You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0327; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this NPRM, the regulatory evaluation, any comments received, and other 
information. The street address for Docket Operations (phone: 800-647-
5527) is listed above. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Tara Shawn, Aerospace Engineer, 
Wichita ACO Branch, 1801 Airport Road, Room 100, Wichita, Kansas 67209; 
telephone: (316) 946-4141; fax: (316) 946-4107; email: 
[email protected] or [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2018-0327; 
Product Identifier 2018-CE-001-AD'' at the beginning of your comments. 
We specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this NPRM. We will consider all 
comments received by the closing date and may amend this NPRM because 
of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this NPRM.

Discussion

    We received a report of skewed flap and aileron binding due to 
fatigue cracks in the flap support structure caused by repetitive flap 
loads on a Learjet, Inc. Model 31A. As of June 2017, cracks in the flap 
support structure were reported (due to Alert Service Bulletins 
published in March 2017) on Models 31, 31A, 35A, 55, and 60 airplanes. 
Repetitive flap loads occur on all models identified by this proposed 
AD. Failure of the flap nose roller support bracket allows skewed flap 
and aileron binding, which can cause loss of roll control on approach. 
This condition, if not addressed, could result in loss of control.
    Although there have been no reports of cracks on the Models 28, 29, 
35, 36, 36A, 55B, and 55C airplanes, these airplanes do incorporate the 
same design flap support structure.

[[Page 20741]]

Related Service Information Under 1 CFR Part 51

    We reviewed Bombardier Learjet 28/29 Service Bulletin (SB) 28/29-
27-31 Recommended, dated September 11, 2017; Bombardier Learjet 31 SB 
31-27-35 Recommended, dated September 11, 2017; Bombardier Learjet 35/
36 SB 35/36 -27-50 Recommended, dated September 11, 2017; Bombardier 
Learjet 55 SB 55-27-41 Recommended, dated September 11, 2017; and 
Bombardier Learjet 60 SB 60-27-39 Recommended, Revision 1, dated 
January 15, 2018. For the applicable models, the service information 
describes procedures for replacement of the flap nose roller fitting, 
nose roller support bracket, and adjacent rib support structure with 
improved components. The service information also contains instructions 
to ensure correct flap alignment. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would require accomplishing the actions specified 
in the service information described previously.

Differences Between This Proposed AD and the Service Information

    The published service information does not list Models 31A, 35A, 
36A, 55B, or 55C as affected models. However, the serial numbers in the 
service information does reflect these models. The serial numbers in 
the service information (except for Models 28/29) does not start with -
001, but the effectivity in this AD starts with -001 for all models. 
The service information for all models also specifies to submit a 
compliance response form to the manufacturer; however, this AD does not 
require that action.

Costs of Compliance

    We estimate that this proposed AD affects 706 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost          Parts cost *       product        operators
----------------------------------------------------------------------------------------------------------------
Replacement of flap nose roller         188 work-hours x $85 per         $12,213         $28,193     $19,904,258
 fitting, nose roller support bracket,   hour = $15,980.
 and adjacent rib support structure
 with improved components.
----------------------------------------------------------------------------------------------------------------
* Parts cost is an average of the composite costs for replacement of all of the kits per airplane. Not all
  airplanes will need all kits, as credit is allowed for some previous installations.


                         Individual Parts Cost *
------------------------------------------------------------------------
                      Kit No. (K/N)                          Part cost
------------------------------------------------------------------------
K/N 2381000-802.........................................            $827
K/N 2381000-804.........................................             822
K/N 2381000-806.........................................             780
K/N 2381000-808.........................................             793
K/N 2381000-809.........................................           1,358
K/N 2381000-810.........................................           1,358
K/N 2381000-811.........................................           1,822
K/N 2381000-817.........................................           1,674
K/N 2381000-818.........................................           1,432
K/N 2381000-819.........................................           1,415
K/N 2381000-820.........................................           1,912
K/N 2381000-821.........................................           1,912
------------------------------------------------------------------------
* Parts required for replacement may vary for different models and
  different airplanes.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to small airplanes, gliders, 
balloons, airships, domestic business jet transport airplanes, and 
associated appliances to the Director of the Policy and Innovation 
Division.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.

[[Page 20742]]

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

Learjet, Inc.: Docket No. FAA-2018-0327; Product Identifier 2018-CE-
001-AD.

(a) Comments Due Date

    We must receive comments by June 22, 2018.

(b) Affected ADs

    None.

(c) Applicability

    (1) This AD applies to the following Learjet, Inc. model 
airplanes that are certificated in any category:
[GRAPHIC] [TIFF OMITTED] TP08MY18.005

(d) Subject

    Joint Aircraft System Component (JASC)/Air Transport Association 
(ATA) of America Code 2750, TE Flap Control System.

(e) Unsafe Condition

    This AD was prompted by reports of fatigue cracks initiating in 
the flap support structure due to repetitive flap loads. We are 
issuing this AD to require replacement of the flap nose roller 
fitting, nose roller support bracket, and adjacent rib support 
structure with more robust components. The unsafe condition, if not 
addressed, could cause flap nose roller support bracket failure and 
allow skewed flap and aileron binding, which could result in loss of 
roll control on approach with consequent loss of control.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Corrective Action

    (1) For Models 28 and 29 airplanes: (i) Within the next 24 
months after the effective date of this AD or within the next 400 
landings after the effective date of this AD, whichever occurs 
first, replace the nose roller fitting, nose roller support bracket, 
and adjacent rib support structure with replacements parts following 
the Accomplishment Instructions in Bombardier Learjet 28/29 Service 
Bulletin (SB) 28/29-27-31 Recommended, dated September 11, 2017.
    (ii) Paragraph 3.B.(1) of the applicable SB for these models 
that have modified flap roller assemblies requires the operator to 
contact Learjet Inc. for repair instructions, and after receiving 
the repair instructions from Learjet, the operator will need to 
request an AMOC as specified in paragraph (j) of this AD in order to 
use the repair.
    (2) For Models 31 and 31A airplanes: Within the next 24 months 
after the effective date of this AD or within the next 400 landings 
after the effective date of this AD, whichever occurs first, replace 
the nose roller fitting, nose roller support bracket and adjacent 
rib support structure with replacements parts following the 
Accomplishment Instructions in Bombardier Learjet 31 SB 31-27-35 
Recommended, dated September 11, 2017.
    (3) For Models 35, 35A, 36, and 36A airplanes: Within the next 
24 months after the effective date of this AD or within the next 400 
landings after the effective date of this AD, whichever occurs 
first, replace the nose roller fitting, nose roller support bracket 
and adjacent rib support structure with replacements parts following 
the Accomplishment Instructions in Bombardier Learjet 35/36 SB 35/
36-27-50 Recommended, dated September 11, 2017.
    (4) For Models 55, 55B, and 55C airplanes: Within the next 24 
months after the effective date of this AD or within the next 400 
landings after the effective date of this AD, whichever occurs 
first, replace the nose roller fitting, nose roller support bracket, 
and adjacent rib support structure with replacements parts following 
the Accomplishment Instructions in Bombardier Learjet 55 SB 55-27-41 
Recommended, dated September 11, 2017.
    (5) For Model 60 airplanes: Within the next 12 months after the 
effective date of this AD or within the next 200 landings after the 
effective date of this AD, whichever occurs first, replace the nose 
roller fitting, nose roller support bracket, and adjacent rib 
support structure with replacement parts following the 
Accomplishment Instructions in Bombardier Learjet 60 SB 60-27-39 
Recommended, Revision 1, dated January 15, 2018.
    (6) For all airplanes: The compliance times in this AD are 
presented in landings. If you do not keep a record of the total 
number of landings, then use a 1-to-1 conversion for hours time-in-
service (TIS) to landings. Example: 20 hours TIS = 20 landings.
    (7) For Models 31, 31A, 35, 35A, 36, 36A, 55, 55B, 55C, and 60 
airplanes: Paragraph 3.B.(2) of the applicable SBs for these models 
that have modified flap roller assemblies requires the operator to 
contact Learjet Inc. for repair instructions, and after receiving 
the repair instructions from Learjet, the operator will need to 
request an alternative method of compliance (AMOC) as specified in 
paragraph (j) of this AD in order to use the repair.

(h) Credit for Previous Actions

    For Model 60 airplanes: This AD allows credit for actions 
required in paragraph (g)(5) of this AD if done before the effective 
date

[[Page 20743]]

of this AD following Bombardier Learjet 60 SB 60-27-39 Recommended, 
Basic Issue, dated September 11, 2017.

(i) No Reporting Requirement

    Although Bombardier Learjet 28/29 SB 28/29-27-31 Recommended, 
dated September 11, 2017; Bombardier Learjet 31 SB 31-27-35 
Recommended, dated September 11, 2017; Bombardier Learjet 35/36 SB 
35/36 -27-50 Recommended, dated September 11, 2017; Bombardier 
Learjet 55 SB 55-27-41 Recommended, dated September 11, 2017; and 
Bombardier Learjet 60 SB 60-27-39 Recommended, Revision 1, dated 
January 15, 2018, all specify to submit a compliance response form 
to the manufacturer per paragraph 3.E., this AD does not require 
that action.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Wichita ACO branch, FAA, has the authority to 
approve AMOCs for this AD, if requested using the procedures found 
in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request 
to your principal inspector or local Flight Standards District 
Office, as appropriate. If sending information directly to the 
manager of the certification office, send it to the attention of the 
person identified in paragraph (k)(1) of this AD.
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(k) Related Information

    (1) For more information about this AD, contact Tara Shawn, 
Aerospace Engineer, Wichita ACO Branch, 1801 Airport Road, Room 100, 
Wichita, Kansas 67209; telephone: (316) 946-4141; fax: (316) 946-
4107; email: [email protected] or [email protected].
    (2) For service information identified in this AD, contact 
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209; telephone: 
316-946-2000; email: [email protected]; internet: https://www.bombardier.com. You may review this referenced service 
information at the FAA, Policy and Innovation Division, 901 Locust, 
Kansas City, Missouri 64106. For information on the availability of 
this material at the FAA, call (816) 329-4148.

    Issued in Kansas City, Missouri, on April 30, 2018.
Melvin J. Johnson,
Deputy Director, Policy & Innovation Division, Aircraft Certification 
Service.
[FR Doc. 2018-09600 Filed 5-7-18; 8:45 am]
 BILLING CODE 4910-13-P

20740 Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules (c) From subsection (e)(1) (Relevancy and DEPARTMENT OF TRANSPORTATION www.regulations.gov by searching for Necessity of Information) because in the and locating Docket No. FAA–2018– course of investigations into potential Federal Aviation Administration 0327; or in person at Docket Operations violations of federal law, the accuracy of between 9 a.m. and 5 p.m., Monday information obtained or introduced 14 CFR Part 39 through Friday, except Federal holidays. occasionally may be unclear, or the The AD docket contains this NPRM, the information may not be strictly relevant or [Docket No. FAA–2018–0327; Product Identifier 2018–CE–001–AD] regulatory evaluation, any comments necessary to a specific investigation. In the received, and other information. The interests of effective law enforcement, it is RIN 2120–AA64 appropriate to retain all information that may street address for Docket Operations aid in establishing patterns of unlawful (phone: 800–647–5527) is listed above. Airworthiness Directives; Learjet, Inc. activity. Comments will be available in the AD Airplanes (d) From subsection (e)(2) (Collection of docket shortly after receipt. Information from Individuals) because AGENCY: Federal Aviation FOR FURTHER INFORMATION CONTACT: Tara requiring that information be collected from Administration (FAA), DOT. Shawn, Aerospace Engineer, Wichita the subject of an investigation would alert the ACTION: Notice of proposed rulemaking ACO Branch, 1801 Airport Road, Room subject to the nature or existence of the (NPRM). 100, Wichita, Kansas 67209; telephone: investigation, thereby interfering with that (316) 946–4141; fax: (316) 946–4107; investigation and related law enforcement SUMMARY: We propose to adopt a new email: tara.shawn@faa.gov or Wichita- activities. airworthiness directive (AD) for certain (e) From subsection (e)(3) (Notice to COS@faa.gov. Learjet, Inc. Models 28, 29, 31, 31A, 35, Subjects) because providing such detailed 35A, 36, 36A, 55, 55B, 55C, and 60 SUPPLEMENTARY INFORMATION: information could impede law enforcement airplanes. This proposed AD was by compromising the existence of a Comments Invited prompted by fatigue cracks initiating in confidential investigation or reveal the We invite you to send any written the flap support structure due to identity of witnesses or confidential relevant data, views, or arguments about informants. repetitive flap loads, which has caused flap nose roller support bracket failure. this proposal. Send your comments to (f) From subsections (e)(4)(G), (e)(4)(H), This proposed AD would require an address listed under the ADDRESSES (e)(4)(I), (Agency Requirements) and (f) (Agency Rules), because portions of this replacement of the flap nose roller section. Include ‘‘Docket No. FAA– system are exempt from the individual access fitting, nose roller support bracket, and 2018–0327; Product Identifier 2018–CE– provisions of subsection (d) for the reasons adjacent rib support structure with more 001–AD’’ at the beginning of your noted above, and therefore DHS is not robust components. We are proposing comments. We specifically invite required to establish requirements, rules, or this AD to address the unsafe condition comments on the overall regulatory, procedures with respect to such access. on these products. economic, environmental, and energy Providing notice to individuals with respect DATES: We must receive comments on aspects of this NPRM. We will consider to existence of records pertaining to them in this proposed AD by June 22, 2018. all comments received by the closing the system of records or otherwise setting up date and may amend this NPRM procedures pursuant to which individuals ADDRESSES: You may send comments, because of those comments. may access and view records pertaining to using the procedures found in 14 CFR 11.43 and 11.45, by any of the following We will post all comments we themselves in the system would undermine methods: receive, without change, to http:// investigative efforts and reveal the identities • Federal eRulemaking Portal: Go to www.regulations.gov, including any of witnesses, and potential witnesses, and confidential informants. http://www.regulations.gov. Follow the personal information you provide. We (g) From subsection (e)(5) (Collection of instructions for submitting comments. will also post a report summarizing each Information) because with the collection of • Fax: 202–493–2251. substantive verbal contact we receive information for law enforcement purposes, it • Mail: U.S. Department of about this NPRM. is impossible to determine in advance what Transportation, Docket Operations, M– Discussion information is accurate, relevant, timely, and 30, West Building Ground Floor, Room complete. Compliance with subsection (e)(5) W12–140, 1200 New Jersey Avenue SE, We received a report of skewed flap would preclude DHS agents from using their Washington, DC 20590. and aileron binding due to fatigue investigative training and exercise of good cracks in the flap support structure • Hand Delivery: Deliver to Mail judgment to both conduct and report on caused by repetitive flap loads on a address above between 9 a.m. and 5 investigations. Learjet, Inc. Model 31A. As of June (h) From subsection (e)(8) (Notice on p.m., Monday through Friday, except Federal holidays. 2017, cracks in the flap support Individuals) because compliance would structure were reported (due to Alert interfere with DHS’s ability to obtain, serve, For service information identified in this NPRM, contact Learjet, Inc., One Service Bulletins published in March and issue subpoenas, warrants, and other law Learjet Way, Wichita, Kansas 67209; 2017) on Models 31, 31A, 35A, 55, and enforcement mechanisms that may be filed under seal and could result in disclosure of telephone: 316–946–2000; email: ac.ict@ 60 airplanes. Repetitive flap loads occur investigative techniques, procedures, and aero.bombardier.com; internet: https:// on all models identified by this evidence. www.bombardier.com. You may view proposed AD. Failure of the flap nose (i) From subsection (g) (Civil Remedies) to this service information at the FAA, roller support bracket allows skewed the extent that the system is exempt from Policy and Innovation Division, 901 flap and aileron binding, which can sradovich on DSK3GMQ082PROD with PROPOSALS other specific subsections of the Privacy Act. Locust, Kansas City, Missouri 64106. cause loss of roll control on approach. * * * * * For information on the availability of This condition, if not addressed, could this material at the FAA, call (816) 329– result in loss of control. Philip S. Kaplan 4148. Although there have been no reports Chief Privacy Officer, Department of of cracks on the Models 28, 29, 35, 36, Homeland Security. Examining the AD Docket 36A, 55B, and 55C airplanes, these [FR Doc. 2018–09906 Filed 5–7–18; 8:45 am] You may examine the AD docket on airplanes do incorporate the same BILLING CODE 9111–28–P the internet at http:// design flap support structure. VerDate Sep<11>2014 16:44 May 07, 2018 Jkt 244001 PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 E:\FR\FM\08MYP1.SGM 08MYP1

Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules 20741 Related Service Information service information is reasonably Differences Between This Proposed AD Under 1 CFR Part 51 available because the interested parties and the Service Information We reviewed Bombardier Learjet 28/ have access to it through their normal The published service information 29 Service Bulletin (SB) 28/29–27–31 course of business or by the means does not list Models 31A, 35A, 36A, Recommended, dated September 11, identified in the ADDRESSES section. 55B, or 55C as affected models. 2017; Bombardier Learjet 31 SB 31–27– FAA’s Determination However, the serial numbers in the 35 Recommended, dated September 11, service information does reflect these 2017; Bombardier Learjet 35/36 SB 35/ We are proposing this AD because we models. The serial numbers in the 36 -27–50 Recommended, dated evaluated all the relevant information service information (except for Models September 11, 2017; Bombardier Learjet and determined the unsafe condition 28/29) does not start with –001, but the 55 SB 55–27–41 Recommended, dated described previously is likely to exist or effectivity in this AD starts with –001 September 11, 2017; and Bombardier develop in other products of the same for all models. The service information Learjet 60 SB 60–27–39 Recommended, type design. for all models also specifies to submit a Revision 1, dated January 15, 2018. For compliance response form to the the applicable models, the service Proposed AD Requirements manufacturer; however, this AD does information describes procedures for not require that action. replacement of the flap nose roller This proposed AD would require accomplishing the actions specified in Costs of Compliance fitting, nose roller support bracket, and adjacent rib support structure with the service information described We estimate that this proposed AD improved components. The service previously. affects 706 airplanes of U.S. registry. information also contains instructions to We estimate the following costs to ensure correct flap alignment. This comply with this proposed AD: ESTIMATED COSTS Cost per Cost on U.S. Action Labor cost Parts cost * product operators Replacement of flap nose roller fitting, nose roller support 188 work-hours × $85 per $12,213 $28,193 $19,904,258 bracket, and adjacent rib support structure with improved hour = $15,980. components. * Parts cost is an average of the composite costs for replacement of all of the kits per airplane. Not all airplanes will need all kits, as credit is allowed for some previous installations. INDIVIDUAL PARTS COST * the Administrator finds necessary for For the reasons discussed above, I safety in air commerce. This regulation certify this proposed regulation: Kit No. (K/N) Part cost is within the scope of that authority (1) Is not a ‘‘significant regulatory because it addresses an unsafe condition action’’ under Executive Order 12866, K/N 2381000–802 ................. $827 that is likely to exist or develop on K/N 2381000–804 ................. 822 (2) Is not a ‘‘significant rule’’ under products identified in this rulemaking K/N 2381000–806 ................. 780 the DOT Regulatory Policies and K/N 2381000–808 ................. 793 action. Procedures (44 FR 11034, February 26, K/N 2381000–809 ................. 1,358 This AD is issued in accordance with 1979), K/N 2381000–810 ................. 1,358 authority delegated by the Executive K/N 2381000–811 ................. 1,822 Director, Aircraft Certification Service, (3) Will not affect intrastate aviation K/N 2381000–817 ................. 1,674 as authorized by FAA Order 8000.51C. in Alaska, and K/N 2381000–818 ................. 1,432 (4) Will not have a significant K/N 2381000–819 ................. 1,415 In accordance with that order, issuance economic impact, positive or negative, K/N 2381000–820 ................. 1,912 of ADs is normally a function of the K/N 2381000–821 ................. 1,912 Compliance and Airworthiness on a substantial number of small entities Division, but during this transition under the criteria of the Regulatory * Parts required for replacement may vary period, the Executive Director has Flexibility Act. for different models and different airplanes. delegated the authority to issue ADs List of Subjects in 14 CFR Part 39 Authority for This Rulemaking applicable to small airplanes, gliders, Title 49 of the United States Code balloons, airships, domestic business jet Air transportation, Aircraft, Aviation specifies the FAA’s authority to issue transport airplanes, and associated safety, Incorporation by reference, rules on aviation safety. Subtitle I, appliances to the Director of the Policy Safety. section 106, describes the authority of and Innovation Division. The Proposed Amendment the FAA Administrator. Subtitle VII: Regulatory Findings Aviation Programs, describes in more Accordingly, under the authority detail the scope of the Agency’s We determined that this proposed AD delegated to me by the Administrator, authority. would not have federalism implications the FAA proposes to amend 14 CFR part sradovich on DSK3GMQ082PROD with PROPOSALS We are issuing this rulemaking under under Executive Order 13132. This 39 as follows: the authority described in Subtitle VII, proposed AD would not have a Part A, Subpart III, Section 44701: substantial direct effect on the States, on PART 39—AIRWORTHINESS ‘‘General requirements.’’ Under that the relationship between the national DIRECTIVES section, Congress charges the FAA with government and the States, or on the promoting safe flight of civil aircraft in distribution of power and ■ 1. The authority citation for part 39 air commerce by prescribing regulations responsibilities among the various continues to read as follows: for practices, methods, and procedures levels of government. Authority: 49 U.S.C. 106(g), 40113, 44701. VerDate Sep<11>2014 16:44 May 07, 2018 Jkt 244001 PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 E:\FR\FM\08MYP1.SGM 08MYP1

20742 Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules § 39.13 [Amended] (a) Comments Due Date (c) Applicability ■ 2. The FAA amends § 39.13 by adding We must receive comments by June 22, (1) This AD applies to the following the following new airworthiness 2018. Learjet, Inc. model airplanes that are directive (AD): certificated in any category: (b) Affected ADs Learjet, Inc.: Docket No. FAA–2018–0327; Product Identifier 2018–CE–001–AD. None. (d) Subject (ii) Paragraph 3.B.(1) of the applicable SB replacements parts following the Joint Aircraft System Component (JASC)/ for these models that have modified flap Accomplishment Instructions in Bombardier Air Transport Association (ATA) of America roller assemblies requires the operator to Learjet 55 SB 55–27–41 Recommended, dated Code 2750, TE Flap Control System. contact Learjet Inc. for repair instructions, September 11, 2017. and after receiving the repair instructions (5) For Model 60 airplanes: Within the next (e) Unsafe Condition from Learjet, the operator will need to 12 months after the effective date of this AD This AD was prompted by reports of request an AMOC as specified in paragraph or within the next 200 landings after the fatigue cracks initiating in the flap support (j) of this AD in order to use the repair. effective date of this AD, whichever occurs structure due to repetitive flap loads. We are (2) For Models 31 and 31A airplanes: first, replace the nose roller fitting, nose issuing this AD to require replacement of the Within the next 24 months after the effective roller support bracket, and adjacent rib date of this AD or within the next 400 support structure with replacement parts flap nose roller fitting, nose roller support landings after the effective date of this AD, following the Accomplishment Instructions bracket, and adjacent rib support structure whichever occurs first, replace the nose roller in Bombardier Learjet 60 SB 60–27–39 with more robust components. The unsafe fitting, nose roller support bracket and Recommended, Revision 1, dated January 15, condition, if not addressed, could cause flap adjacent rib support structure with 2018. nose roller support bracket failure and allow replacements parts following the (6) For all airplanes: The compliance times skewed flap and aileron binding, which Accomplishment Instructions in Bombardier in this AD are presented in landings. If you could result in loss of roll control on Learjet 31 SB 31–27–35 Recommended, dated do not keep a record of the total number of approach with consequent loss of control. September 11, 2017. landings, then use a 1-to-1 conversion for (f) Compliance (3) For Models 35, 35A, 36, and 36A hours time-in-service (TIS) to landings. airplanes: Within the next 24 months after Example: 20 hours TIS = 20 landings. Comply with this AD within the the effective date of this AD or within the (7) For Models 31, 31A, 35, 35A, 36, 36A, compliance times specified, unless already next 400 landings after the effective date of 55, 55B, 55C, and 60 airplanes: Paragraph done. this AD, whichever occurs first, replace the 3.B.(2) of the applicable SBs for these models (g) Corrective Action nose roller fitting, nose roller support bracket that have modified flap roller assemblies and adjacent rib support structure with requires the operator to contact Learjet Inc. (1) For Models 28 and 29 airplanes: (i) replacements parts following the for repair instructions, and after receiving the Within the next 24 months after the effective Accomplishment Instructions in Bombardier repair instructions from Learjet, the operator sradovich on DSK3GMQ082PROD with PROPOSALS date of this AD or within the next 400 Learjet 35/36 SB 35/36–27–50 will need to request an alternative method of landings after the effective date of this AD, Recommended, dated September 11, 2017. compliance (AMOC) as specified in whichever occurs first, replace the nose roller (4) For Models 55, 55B, and 55C airplanes: paragraph (j) of this AD in order to use the fitting, nose roller support bracket, and Within the next 24 months after the effective repair. adjacent rib support structure with date of this AD or within the next 400 replacements parts following the landings after the effective date of this AD, (h) Credit for Previous Actions Accomplishment Instructions in Bombardier whichever occurs first, replace the nose roller For Model 60 airplanes: This AD allows Learjet 28/29 Service Bulletin (SB) 28/29–27– fitting, nose roller support bracket, and credit for actions required in paragraph (g)(5) EP08MY18.005</GPH> 31 Recommended, dated September 11, 2017. adjacent rib support structure with of this AD if done before the effective date VerDate Sep<11>2014 16:44 May 07, 2018 Jkt 244001 PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 E:\FR\FM\08MYP1.SGM 08MYP1

Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules 20743 of this AD following Bombardier Learjet 60 DEPARTMENT OF TRANSPORTATION information on the availability of this SB 60–27–39 Recommended, Basic Issue, material at the FAA, call 206–231–3195. dated September 11, 2017. Federal Aviation Administration Examining the AD Docket (i) No Reporting Requirement 14 CFR Part 39 You may examine the AD docket on Although Bombardier Learjet 28/29 SB 28/ the internet at http:// 29–27–31 Recommended, dated September [Docket No. FAA–2018–0396; Product www.regulations.gov by searching for 11, 2017; Bombardier Learjet 31 SB 31–27– Identifier 2017–NM–156–AD] and locating Docket No. FAA–2018– 35 Recommended, dated September 11, 2017; 0396; or in person at the Docket Bombardier Learjet 35/36 SB 35/36 -27–50 RIN 2120–AA64 Management Facility between 9 a.m. Recommended, dated September 11, 2017; and 5 p.m., Monday through Friday, Bombardier Learjet 55 SB 55–27–41 Airworthiness Directives; Airbus Airplanes except Federal holidays. The AD docket Recommended, dated September 11, 2017; contains this NPRM, the regulatory and Bombardier Learjet 60 SB 60–27–39 AGENCY: Federal Aviation evaluation, any comments received, and Recommended, Revision 1, dated January 15, Administration (FAA), DOT. other information. The street address for 2018, all specify to submit a compliance ACTION: Notice of proposed rulemaking the Docket Operations office (telephone response form to the manufacturer per (NPRM). 800–647–5527) is in the ADDRESSES paragraph 3.E., this AD does not require that section. Comments will be available in action. SUMMARY: We propose to adopt a new the AD docket shortly after receipt. (j) Alternative Methods of Compliance airworthiness directive (AD) for all FOR FURTHER INFORMATION CONTACT: Dan (AMOCs) Airbus Model A300 B4–600, B4–600R, Rodina, Aerospace Engineer, and F4–600R series airplanes, and (1) The Manager, Wichita ACO branch, International Section, Transport Model A300 C4–605R Variant F FAA, has the authority to approve AMOCs Standards Branch, FAA, 2200 South airplanes (collectively called Model for this AD, if requested using the procedures 216th St., Des Moines, WA 98198; A300–600 series airplanes), and Model found in 14 CFR 39.19. In accordance with telephone and fax 206–231–3225. 14 CFR 39.19, send your request to your A310 series airplanes. This proposed AD was prompted by a determination SUPPLEMENTARY INFORMATION: principal inspector or local Flight Standards District Office, as appropriate. If sending that new or more restrictive Comments Invited information directly to the manager of the maintenance requirements and We invite you to send any written certification office, send it to the attention of airworthiness limitations are necessary. relevant data, views, or arguments about the person identified in paragraph (k)(1) of This proposed AD would require this proposal. Send your comments to this AD. revising the maintenance or inspection an address listed under the ADDRESSES (2) Before using any approved AMOC, program, as applicable, to incorporate section. Include ‘‘Docket No. FAA– notify your appropriate principal inspector, new or more restrictive maintenance 2018–0396; Product Identifier 2017– or lacking a principal inspector, the manager requirements and airworthiness NM–156–AD’’ at the beginning of your of the local flight standards district office/ limitations. We are proposing this AD to comments. We specifically invite certificate holding district office. address the unsafe condition on these comments on the overall regulatory, products. (k) Related Information economic, environmental, and energy DATES: We must receive comments on aspects of this NPRM. We will consider (1) For more information about this AD, this proposed AD by June 22, 2018. all comments received by the closing contact Tara Shawn, Aerospace Engineer, Wichita ACO Branch, 1801 Airport Road, ADDRESSES: You may send comments, date and may amend this NPRM based Room 100, Wichita, Kansas 67209; telephone: using the procedures found in 14 CFR on those comments. (316) 946–4141; fax: (316) 946–4107; email: 11.43 and 11.45, by any of the following We will post all comments we tara.shawn@faa.gov or Wichita-COS@faa.gov. methods: receive, without change, to http:// (2) For service information identified in • Federal eRulemaking Portal: Go to www.regulations.gov, including any this AD, contact Learjet, Inc., One Learjet http://www.regulations.gov. Follow the personal information you provide. We Way, Wichita, Kansas 67209; telephone: 316– instructions for submitting comments. will also post a report summarizing each 946–2000; email: ac.ict@ • Fax: 202–493–2251. substantive verbal contact we receive aero.bombardier.com; internet: https:// • Mail: U.S. Department of about this NPRM. www.bombardier.com. You may review this Transportation, Docket Operations, M– Discussion referenced service information at the FAA, 30, West Building Ground Floor, Room Policy and Innovation Division, 901 Locust, W12–140, 1200 New Jersey Avenue SE, The European Aviation Safety Agency Kansas City, Missouri 64106. For information Washington, DC 20590. (EASA), which is the Technical Agent on the availability of this material at the • Hand Delivery: Deliver to Mail for the Member States of the European FAA, call (816) 329–4148. address above between 9 a.m. and 5 Union, has issued EASA Airworthiness p.m., Monday through Friday, except Directive 2017–0202, dated October 12, Issued in Kansas City, Missouri, on April Federal holidays. 2017 (referred to after this as the 30, 2018. For service information identified in Mandatory Continuing Airworthiness Melvin J. Johnson, Information, or ‘‘the MCAI’’), to correct this NPRM, contact Airbus SAS, Deputy Director, Policy & Innovation Division, Airworthiness Office—EAW, 1 Rond an unsafe condition for all Airbus sradovich on DSK3GMQ082PROD with PROPOSALS Aircraft Certification Service. Point Maurice Bellonte, 31707 Blagnac Model A300 B4–600, B4–600R, and F4– [FR Doc. 2018–09600 Filed 5–7–18; 8:45 am] Cedex, France; telephone +33 5 61 93 36 600R series airplanes, and Model A300 BILLING CODE 4910–13–P 96; fax +33 5 61 93 44 51; email C4–605R Variant F airplanes account.airworth-eas@airbus.com; (collectively called Model A300–600 internet http://www.airbus.com. You series airplanes), and Model A310 series may view this service information at the airplanes. The MCAI states: FAA, Transport Standards Branch, 2200 Maintenance requirements and South 216th St., Des Moines, WA. For airworthiness limitations for the Airbus VerDate Sep<11>2014 16:44 May 07, 2018 Jkt 244001 PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 E:\FR\FM\08MYP1.SGM 08MYP1


Document Created: 2018-05-08 01:32:32
Document Modified: 2018-05-08 01:32:32
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionProposed Rules
ActionNotice of proposed rulemaking (NPRM).
DatesWe must receive comments on this proposed AD by June 22, 2018.
ContactTara Shawn, Aerospace Engineer, Wichita ACO Branch, 1801 Airport Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-4141; fax: (316) 946-4107; email: [email protected] or [email protected]
FR Citation83 FR 20740 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety
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