83 FR 16013 - Airworthiness Directives; Bombardier, Inc., Airplanes

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 83, Issue 72 (April 13, 2018)

Page Range		16013-16015
FR Document		2018-07633

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This proposed AD was prompted by reports of fire incidents of the auxiliary power unit (APU) inlet, which caused tail cone damage after an initial failed APU start followed by two or more in-flight APU start attempts. This proposed AD would require modification of the APU electronic control unit (ECU) wiring harness. We are proposing this AD to address the unsafe condition on these products.

Federal Register, Volume 83 Issue 72 (Friday, April 13, 2018)

[Federal Register Volume 83, Number 72 (Friday, April 13, 2018)]
[Proposed Rules]
[Pages 16013-16015]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-07633]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0274; Product Identifier 2017-NM-128-AD]
RIN 2120-AA64


Airworthiness Directives; Bombardier, 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 Bombardier, Inc., Model BD-100-1A10 airplanes. This proposed AD 
was prompted by reports of fire incidents of the auxiliary power unit 
(APU) inlet, which caused tail cone damage after an initial failed APU 
start followed by two or more in-flight APU start attempts. This 
proposed AD would require modification of the APU electronic control 
unit (ECU) wiring harness. We are proposing this AD to address the 
unsafe condition on these products.

DATES: We must receive comments on this proposed AD by May 29, 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 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec 
H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; email 
[email protected]; internet http://www.bombardier.com. You 
may view this service information at the FAA, Transport Standards 
Branch, 2200 South 216th Street, Des Moines, WA. For information on the 
availability of this material at the FAA, call 206-231-3195.

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-
0274; or in person at the Docket Management Facility 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 the Docket Operations 
office (telephone 800-647-5527) is in the ADDRESSES section. Comments 
will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Assata Dessaline, Aerospace Engineer, 
Avionics and Administrative Services Section, FAA, New York ACO Branch, 
1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-
7301; fax 516-794-5531.

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-2018-0274; 
Product Identifier 2017-NM-128-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 based on 
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

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2017-26, dated July 31, 2017 (referred to after this as the Mandatory 
Continuing Airworthiness Information, or ``the MCAI''), to correct an 
unsafe condition for certain Bombardier, Inc., Model BD-100-1A10 
airplanes. The MCAI states:

    APU inlet fire incidents causing tail cone damage have been 
reported after an initial failed APU start followed by two or more 
in-flight APU start attempts. Bombardier Inc. (BA) has determined 
that the in-flight negative pressure differential at the APU inlet 
allows flash fires of residual fuel in the APU combustor to exit 
through the APU inlet.
    As an interim mitigating action, BA has revised the affected 
aeroplane Aircraft Flight Manual (AFM) procedure for in-flight APU 
start to limit the number of APU start attempts.
    To further address the safety concerns associated with in-flight 
APU inlet fire, BA is introducing a modification to the APU 
Electronic Control Unit (ECU) wiring harness that will prevent a 
second attempt to start the APU following a failed start in flight. 
This [Canadian] AD is issued to mandate compliance with BA Service 
Bulletin (SB) 100-49-04 or SB 350-49-001, as applicable, on affected 
aeroplanes.

    You may examine the MCAI in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0274.

Related Service Information Under 1 CFR Part 51

    Bombardier, Inc., has issued Service Bulletin 100-49-04, dated 
March 29, 2017; and Service Bulletin 350-49-001, dated March 29, 2017. 
This service information describes a modification of the APU ECU 
harness. These documents are distinct since they apply to different 
airplane models in different configurations. 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 and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

[[Page 16014]]

Costs of Compliance

    We estimate that this proposed AD affects 198 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
----------------------------------------------------------------------------------------------------------------
Modification.......................  3 work-hours x $85 per hour            $120            $375         $74,250
                                      = $255.
----------------------------------------------------------------------------------------------------------------

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 proposed 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 transport category airplanes to the Director of the System Oversight 
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.


Sec.  39.13   [Amended]

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

Bombardier, Inc.: Docket No. FAA-2018-0274; Product Identifier 2017-
NM-128-AD.

(a) Comments Due Date

    We must receive comments by May 29, 2018.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-100-1A10 
airplanes, certificated in any category, serial numbers (S/Ns) 20003 
through 20500 inclusive and 20501 through 20696 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 49, Airborne 
auxiliary power.

(e) Reason

    This AD was prompted by reports of fire incidents of the 
auxiliary power unit (APU) inlet, which caused tail cone damage 
after an initial failed APU start followed by two or more in-flight 
APU start attempts. We are issuing this AD to prevent failure of the 
APU inlet, which could result in fire during flight.

(f) Compliance

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

(g) Modification

    Within 30 months after the effective date of this AD: Modify the 
APU electronic control unit wiring harness, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 100-49-
04, dated March 29, 2017 (for S/N 20003 to 20500 inclusive); or 
Bombardier Service Bulletin 350-49-001, dated March 29, 2017 (for S/
N 20501 to 20696 inclusive).

(h) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York 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 ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 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.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain corrective actions from a manufacturer, the action must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or 
Bombardier Inc.'s TCCA Design Approval Organization (DAO). If 
approved by the DAO, the approval must include the DAO-authorized 
signature.

(i) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2017-26, dated July 31, 
2017, for related information. This MCAI may be found in the AD 
docket on the internet at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2018-0274.
    (2) For more information about this AD, contact Assata 
Dessaline, Aerospace Engineer, Avionics and Administrative Services 
Section, FAA, New York ACO

[[Page 16015]]

Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7301; fax 516-794-5531.
    (3) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; email [email protected]; internet http://www.bombardier.com. You may view this service information at the 
FAA, Transport Standards Branch, 2200 South 216th Street, Des 
Moines, WA. For information on the availability of this material at 
the FAA, call 206-231-3195.

    Issued in Des Moines, Washington, on March 29, 2018.
Chris Spangenberg,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-07633 Filed 4-12-18; 8:45 am]
 BILLING CODE 4910-13-P

Federal Register / Vol. 83, No. 72 / Friday, April 13, 2018 / Proposed Rules 16013

(2) For service information identified in p.m., Monday through Friday, except dated July 31, 2017 (referred to after this
this AD, contact Boeing Commercial Federal holidays. as the Mandatory Continuing
Airplanes, Attention: Contractual & Data For service information identified in Airworthiness Information, or ‘‘the
Services (C&DS), 2600 Westminster Blvd., this NPRM, contact Bombardier, Inc., MCAI’’), to correct an unsafe condition
MC 110–SK57, Seal Beach, CA 90740–5600; 400 Côte-Vertu Road West, Dorval,
telephone 562–797–1717; internet https://
for certain Bombardier, Inc., Model BD–
www.myboeingfleet.com. You may view this
Québec H4S 1Y9, Canada; telephone 100–1A10 airplanes. The MCAI states:
referenced service information at the FAA, 514–855–5000; fax 514–855–7401; email APU inlet fire incidents causing tail cone
Transport Standards Branch, 2200 South thd.crj@aero.bombardier.com; internet damage have been reported after an initial
216th St., Des Moines, WA. For information http://www.bombardier.com. You may failed APU start followed by two or more in-
on the availability of this material at the view this service information at the flight APU start attempts. Bombardier Inc.
FAA, call 206–231–3195. FAA, Transport Standards Branch, 2200 (BA) has determined that the in-flight
Issued in Des Moines, Washington, on South 216th Street, Des Moines, WA. negative pressure differential at the APU
March 29, 2018. For information on the availability of inlet allows flash fires of residual fuel in the
this material at the FAA, call 206–231– APU combustor to exit through the APU
Chris Spangenberg,
3195. inlet.
Acting Director, System Oversight Division, As an interim mitigating action, BA has
Aircraft Certification Service. Examining the AD Docket revised the affected aeroplane Aircraft Flight
[FR Doc. 2018–07632 Filed 4–12–18; 8:45 am]
You may examine the AD docket on Manual (AFM) procedure for in-flight APU
BILLING CODE 4910–13–P start to limit the number of APU start
the internet at http://
attempts.
www.regulations.gov by searching for To further address the safety concerns
and locating Docket No. FAA–2018– associated with in-flight APU inlet fire, BA
DEPARTMENT OF TRANSPORTATION 0274; or in person at the Docket is introducing a modification to the APU
Federal Aviation Administration Management Facility between 9 a.m. Electronic Control Unit (ECU) wiring harness
and 5 p.m., Monday through Friday, that will prevent a second attempt to start the
except Federal holidays. The AD docket APU following a failed start in flight. This
14 CFR Part 39 [Canadian] AD is issued to mandate
contains this NPRM, the regulatory
[Docket No. FAA–2018–0274; Product evaluation, any comments received, and compliance with BA Service Bulletin (SB)
Identifier 2017–NM–128–AD] other information. The street address for 100–49–04 or SB 350–49–001, as applicable,
on affected aeroplanes.
RIN 2120–AA64 the Docket Operations office (telephone
800–647–5527) is in the ADDRESSES You may examine the MCAI in the
Airworthiness Directives; Bombardier, section. Comments will be available in AD docket on the internet at http://
Inc., Airplanes the AD docket shortly after receipt. www.regulations.gov by searching for
FOR FURTHER INFORMATION CONTACT: and locating Docket No. FAA–2018–
AGENCY: Federal Aviation
Assata Dessaline, Aerospace Engineer, 0274.
Administration (FAA), DOT.
Avionics and Administrative Services
ACTION: Notice of proposed rulemaking Section, FAA, New York ACO Branch, Related Service Information Under 1
(NPRM). 1600 Stewart Avenue, Suite 410, CFR Part 51
SUMMARY: We propose to adopt a new Westbury, NY 11590; telephone 516– Bombardier, Inc., has issued Service
airworthiness directive (AD) for certain 228–7301; fax 516–794–5531. Bulletin 100–49–04, dated March 29,
Bombardier, Inc., Model BD–100–1A10 SUPPLEMENTARY INFORMATION: 2017; and Service Bulletin 350–49–001,
airplanes. This proposed AD was Comments Invited dated March 29, 2017. This service
prompted by reports of fire incidents of information describes a modification of
We invite you to send any written
the auxiliary power unit (APU) inlet, the APU ECU harness. These documents
relevant data, views, or arguments about
which caused tail cone damage after an are distinct since they apply to different
this proposal. Send your comments to
initial failed APU start followed by two airplane models in different
an address listed under the ADDRESSES
or more in-flight APU start attempts. configurations. This service information
section. Include ‘‘Docket No. FAA–
This proposed AD would require is reasonably available because the
2018–0274; Product Identifier 2017–
modification of the APU electronic interested parties have access to it
NM–128–AD’’ at the beginning of your
control unit (ECU) wiring harness. We through their normal course of business
comments. We specifically invite
are proposing this AD to address the or by the means identified in the
comments on the overall regulatory,
unsafe condition on these products. ADDRESSES section.
economic, environmental, and energy
DATES: We must receive comments on aspects of this NPRM. We will consider FAA’s Determination and Requirements
this proposed AD by May 29, 2018. all comments received by the closing of This Proposed AD
ADDRESSES: You may send comments, date and may amend this NPRM based
using the procedures found in 14 CFR on those comments. This product has been approved by
11.43 and 11.45, by any of the following We will post all comments we the aviation authority of another
methods: receive, without change, to http:// country, and is approved for operation
• Federal eRulemaking Portal: Go to www.regulations.gov, including any in the United States. Pursuant to our
http://www.regulations.gov. Follow the personal information you provide. We bilateral agreement with the State of
instructions for submitting comments. will also post a report summarizing each Design Authority, we have been notified
daltland on DSKBBV9HB2PROD with PROPOSALS

• Fax: 202–493–2251. substantive verbal contact we receive of the unsafe condition described in the
• Mail: U.S. Department of about this NPRM. MCAI and service information
Transportation, Docket Operations, M– referenced above. We are proposing this
30, West Building Ground Floor, Room Discussion AD because we evaluated all pertinent
W12–140, 1200 New Jersey Avenue SE, Transport Canada Civil Aviation information and determined an unsafe
Washington, DC 20590. (TCCA), which is the aviation authority condition exists and is likely to exist or
• Hand Delivery: Deliver to Mail for Canada, has issued Canadian develop on other products of the same
address above between 9 a.m. and 5 Airworthiness Directive CF–2017–26, type design.

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16014 Federal Register / Vol. 83, No. 72 / Friday, April 13, 2018 / Proposed Rules

Costs of Compliance We estimate the following costs to
We estimate that this proposed AD comply with this proposed AD:
affects 198 airplanes of U.S. registry.
ESTIMATED COSTS
Cost per Cost on U.S.
Action Labor cost Parts cost product operators

Modification ............................. 3 work-hours × $85 per hour = $255 ..................................... $120 $375 $74,250

Authority for This Rulemaking 3. Will not affect intrastate aviation in (f) Compliance
Title 49 of the United States Code Alaska; and Comply with this AD within the
specifies the FAA’s authority to issue 4. Will not have a significant compliance times specified, unless already
economic impact, positive or negative, done.
rules on aviation safety. Subtitle I,
section 106, describes the authority of on a substantial number of small entities (g) Modification
the FAA Administrator. ‘‘Subtitle VII: under the criteria of the Regulatory
Within 30 months after the effective date
Aviation Programs,’’ describes in more Flexibility Act. of this AD: Modify the APU electronic
detail the scope of the Agency’s List of Subjects in 14 CFR Part 39 control unit wiring harness, in accordance
authority. with the Accomplishment Instructions of
Air transportation, Aircraft, Aviation Bombardier Service Bulletin 100–49–04,
We are issuing this rulemaking under
safety, Incorporation by reference, dated March 29, 2017 (for S/N 20003 to
the authority described in ‘‘Subtitle VII,
Safety. 20500 inclusive); or Bombardier Service
Part A, Subpart III, Section 44701: Bulletin 350–49–001, dated March 29, 2017
General requirements.’’ Under that The Proposed Amendment (for S/N 20501 to 20696 inclusive).
section, Congress charges the FAA with Accordingly, under the authority (h) Other FAA AD Provisions
promoting safe flight of civil aircraft in delegated to me by the Administrator,
air commerce by prescribing regulations The following provisions also apply to this
the FAA proposes to amend 14 CFR part AD:
for practices, methods, and procedures 39 as follows: (1) Alternative Methods of Compliance
the Administrator finds necessary for (AMOCs): The Manager, New York ACO
safety in air commerce. This regulation PART 39—AIRWORTHINESS Branch, FAA, has the authority to approve
is within the scope of that authority DIRECTIVES AMOCs for this AD, if requested using the
because it addresses an unsafe condition procedures found in 14 CFR 39.19. In
that is likely to exist or develop on ■ 1. The authority citation for part 39 accordance with 14 CFR 39.19, send your
products identified in this rulemaking continues to read as follows: request to your principal inspector or local
action. Flight Standards District Office, as
Authority: 49 U.S.C. 106(g), 40113, 44701.
This proposed AD is issued in appropriate. If sending information directly
§ 39.13 [Amended] to the manager of the certification office,
accordance with authority delegated by send it to ATTN: Program Manager,
the Executive Director, Aircraft ■ 2. The FAA amends § 39.13 by adding Continuing Operational Safety, FAA, New
Certification Service, as authorized by the following new airworthiness York ACO Branch, 1600 Stewart Avenue,
FAA Order 8000.51C. In accordance directive (AD): Suite 410, Westbury, NY 11590; telephone
with that order, issuance of ADs is Bombardier, Inc.: Docket No. FAA–2018– 516–228–7300; fax 516–794–5531. Before
normally a function of the Compliance 0274; Product Identifier 2017–NM–128– using any approved AMOC, notify your
and Airworthiness Division, but during AD. appropriate principal inspector, or lacking a
this transition period, the Executive principal inspector, the manager of the local
(a) Comments Due Date flight standards district office/certificate
Director has delegated the authority to holding district office.
issue ADs applicable to transport We must receive comments by May 29,
2018. (2) Contacting the Manufacturer: For any
category airplanes to the Director of the requirement in this AD to obtain corrective
System Oversight Division. (b) Affected ADs actions from a manufacturer, the action must
None. be accomplished using a method approved
Regulatory Findings by the Manager, New York ACO Branch,
We determined that this proposed AD (c) Applicability FAA; or Transport Canada Civil Aviation
would not have federalism implications This AD applies to Bombardier, Inc., (TCCA); or Bombardier Inc.’s TCCA Design
under Executive Order 13132. This Model BD–100–1A10 airplanes, certificated Approval Organization (DAO). If approved by
in any category, serial numbers (S/Ns) 20003 the DAO, the approval must include the
proposed AD would not have a
through 20500 inclusive and 20501 through DAO-authorized signature.
substantial direct effect on the States, on
20696 inclusive. (i) Related Information
the relationship between the national
Government and the States, or on the (d) Subject (1) Refer to Mandatory Continuing
distribution of power and Air Transport Association (ATA) of Airworthiness Information (MCAI) Canadian
responsibilities among the various America Code 49, Airborne auxiliary power. Airworthiness Directive CF–2017–26, dated
daltland on DSKBBV9HB2PROD with PROPOSALS

levels of government. July 31, 2017, for related information. This
(e) Reason MCAI may be found in the AD docket on the
For the reasons discussed above, I
This AD was prompted by reports of fire internet at http://www.regulations.gov by
certify this proposed regulation:
incidents of the auxiliary power unit (APU) searching for and locating Docket No. FAA–
1. Is not a ‘‘significant regulatory inlet, which caused tail cone damage after an 2018–0274.
action’’ under Executive Order 12866; initial failed APU start followed by two or (2) For more information about this AD,
2. Is not a ‘‘significant rule’’ under the more in-flight APU start attempts. We are contact Assata Dessaline, Aerospace
DOT Regulatory Policies and Procedures issuing this AD to prevent failure of the APU Engineer, Avionics and Administrative
(44 FR 11034, February 26, 1979); inlet, which could result in fire during flight. Services Section, FAA, New York ACO

VerDate Sep<11>2014 16:42 Apr 12, 2018 Jkt 244001 PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 E:\FR\FM\13APP1.SGM 13APP1

Document Created: 2018-04-13 00:18:14
Document Modified: 2018-04-13 00:18:14

Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Proposed Rules
Action		Notice of proposed rulemaking (NPRM).
Dates		We must receive comments on this proposed AD by May 29, 2018.
Contact		Assata Dessaline, Aerospace Engineer, Avionics and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228- 7301; fax 516-794-5531.
FR Citation		83 FR 16013
RIN Number		2120-AA64
CFR Associated		Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

83 FR 16013 - Airworthiness Directives; Bombardier, Inc., Airplanes

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 83, Issue 72 (April 13, 2018)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration