80_FR_76636 80 FR 76400 - Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

80 FR 76400 - Airworthiness Directives; Pratt & Whitney Division Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 80, Issue 236 (December 9, 2015)

Page Range76400-76402
FR Document2015-30948

We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4000-94 inch and PW4000-100 inch model turbofan engines. This proposed AD was prompted by a report of a crack find in the high-pressure compressor (HPC) disk. This proposed AD would require performing an ultrasonic inspection (USI) or an eddy current inspection (ECI) of the HPC 10th stage disk. We are proposing this AD to prevent failure of the HPC 10th stage disk, an uncontained disk release, damage to the engine, and damage to the airplane.

Federal Register, Volume 80 Issue 236 (Wednesday, December 9, 2015) 
[Federal Register Volume 80, Number 236 (Wednesday, December 9, 2015)]
[Proposed Rules]
[Pages 76400-76402]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-30948]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-4474; Directorate Identifier 2015-NE-34-AD]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Division Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain Pratt & Whitney Division (PW) PW4000-94 inch and PW4000-100 
inch model turbofan engines. This proposed AD was prompted by a report 
of a crack find in the high-pressure compressor (HPC) disk. This 
proposed AD would require performing an ultrasonic inspection (USI) or 
an eddy current inspection (ECI) of the HPC 10th stage disk. We are 
proposing this AD to prevent failure of the HPC 10th stage disk, an 
uncontained disk release, damage to the engine, and damage to the 
airplane.

DATES: We must receive comments on this proposed AD by February 8, 
2016.

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 proposed AD, contact 
Pratt & Whitney Division, 400 Main St., East Hartford, CT 06108; phone: 
(860) 565-8770; fax: (860) 565-4503. You may view this service 
information at the FAA, Engine & Propeller Directorate, 12 New England 
Executive Park, Burlington, MA. For information on the availability of 
this material at the FAA, call (781) 238-7125.

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-2015-
4474; 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 proposed AD, the regulatory evaluation, any comments 
received, and other information. The street address for the Docket 
Office (phone: 800-647-5527) is in the ADDRESSES section. Comments will 
be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Katheryn Malatek, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803; phone: 781-238-7747; 
fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this NPRM. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2015-4474; 
Directorate Identifier 2015-NE-34-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 propose to adopt a new AD for certain PW PW4000-94 inch turbofan 
engines with HPC 10th stage disk, part number (P/N) 51H710 or 53H976-
06, installed and certain PW4000-100 inch turbofan engines with HPC 
10th stage disk, P/N 53H976-06, installed. This proposed AD was 
prompted by a report of a crack find in the HPC 10th stage disk. The 
root cause of the crack was a manual polishing procedure, previously 
used during manufacture, that caused surface scratches on the disk. 
This proposed AD would require a USI or ECI of the HPC 10th stage disk. 
We are proposing this AD to prevent failure of the HPC 10th stage disk, 
which could lead to an uncontained disk release, damage to the engine, 
and damage to the airplane.

[[Page 76401]]

Related Service Information Under 1 CFR Part 51

    We reviewed PW Alert Service Bulletin (ASB) No. PW4G-100-A72-255, 
dated August 31, 2015 and PW ASB No. PW4ENG A72-833, dated August 20, 
2015. The ASBs provide lists of affected HPC disks and describe 
procedures for USI and ECI of the HPC 10th stage disk. 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 of this NPRM.

FAA's Determination

    We are proposing this NPRM 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 NPRM would require performing a USI or ECI of the HPC 10th 
stage disk.

Costs of Compliance

    We estimate that this proposed AD affects 763 engines installed on 
airplanes of U.S. registry. We also estimate that it would take about 
12 hours per engine to do the inspection. The average labor rate is $85 
per hour. Based on these figures, we estimate the cost of this proposed 
AD on U.S. operators to be $778,260.

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.

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 to the extent 
that it justifies making a regulatory distinction, 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):

Pratt & Whitney Division: Docket No. FAA-2015-4474; Directorate 
Identifier 2015-NE-34-AD.

(a) Comments Due Date

    We must receive comments by February 8, 2016.

(b) Affected ADs

    None.

(c) Applicability

    (1) This AD applies to all Pratt & Whitney Division (PW) PW4050, 
PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, 
PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan 
engines, including models with a ``-3'' suffix, with one of the 
following installed:
    (i) High-pressure compressor (HPC) 10th stage disk, part number 
(P/N) 51H710, with a serial number (S/N) listed in Table 1 of PW 
Alert Service Bulletin (ASB) No. PW4ENG A72-833, dated August 20, 
2015; or
    (ii) HPC 10th stage disk, P/N 53H976-06, with an S/N listed in 
Table 2 of PW ASB No. PW4ENG A72-833, dated August 20, 2015.
    (2) This AD also applies to all PW PW4164, PW4168, PW4168A, 
PW4164C, PW4164C/B, PW4170, PW4168A-1D, PW4168-1D, PW4164-1D, 
PW4164C-1D, and PW4164C/B-1D turbofan engines with an HPC 10th stage 
disk, P/N 53H976-06, with an S/N listed Table 1 of PW ASB No. PW4G-
100-A72-255, dated August 31, 2015, installed.

(d) Unsafe Condition

    This AD was prompted by a report of a crack find in the HPC 10th 
stage disk. We are issuing this AD to prevent failure of the HPC 
10th stage disk, an uncontained disk release, damage to the engine, 
and damage to the airplane.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    (1) Whenever the high-pressure turbine (HPT) or low-pressure 
turbine (LPT) is removed from the engine, perform an ultrasonic 
inspection (USI) of the HPC 10th stage disk for cracks. Remove from 
service any HPC 10th stage disk that fails inspection and replace 
with a part eligible for installation.
    (2) Whenever the HPC front drum rotor disk assembly is removed 
from the engine, perform an eddy current inspection (ECI) of the HPC 
10th stage disk for cracks. Remove from service any HPC 10th stage 
disk that fails inspection and replace with a part eligible for 
installation. A USI as required by paragraph (e)(1) of this AD is 
not required if an ECI is performed.

(f) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(g) Related Information

    (1) For more information about this AD, contact Katheryn 
Malatek, Aerospace Engineer, Engine Certification Office, FAA, 
Engine & Propeller Directorate, 12 New England Executive Park, 
Burlington, MA 01803; phone: 781-238-7747; fax: 781-238-7199; email: 
[email protected].
    (2) PW ASB No. PW4G-100-A72-255, dated August 31, 2015 and PW 
ASB No. PW4ENG A72-833, dated August 20, 2015, can be obtained from 
PW using the contact information in paragraph (g)(3) of this AD.
    (3) For service information identified in this AD, contact Pratt 
& Whitney Division, 400 Main St., East Hartford, CT 06108; phone: 
(860) 565-8770; fax: (860) 565-4503.
    (4) You may view this service information at the FAA, Engine & 
Propeller Directorate, 12 New England Executive Park, Burlington, 
MA. For information on the availability of this material at the FAA, 
call (781) 238-7125.


[[Page 76402]]


    Issued in Burlington, Massachusetts, on December 3, 2015.
Colleen M. D'Alessandro,
Directorate Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2015-30948 Filed 12-8-15; 8:45 am]
 BILLING CODE 4910-13-P

76400 Federal Register / Vol. 80, No. 236 / Wednesday, December 9, 2015 / Proposed Rules (i) Credit for Actions Accomplished in DEPARTMENT OF TRANSPORTATION and locating Docket No. FAA–2015– Accordance With Previous Service 4474; or in person at the Docket Information Federal Aviation Administration Management Facility between 9 a.m. This AD allows credit for the inspection and 5 p.m., Monday through Friday, required in paragraph (g)(1) of this AD and 14 CFR Part 39 except Federal holidays. The AD docket the repair required in paragraph (g)(2) of this [Docket No. FAA–2015–4474; Directorate contains this proposed AD, the AD, if done before the effective date of this Identifier 2015–NE–34–AD] regulatory evaluation, any comments AD, following Part I of the Instructions in received, and other information. The Piper Aircraft, Inc. Service Bulletin No. 1273, RIN 2120–AA64 street address for the Docket Office dated June 4, 2015. This AD also allows (phone: 800–647–5527) is in the credit for the modification required in Airworthiness Directives; Pratt & ADDRESSES section. Comments will be paragraph (h) of this AD, if done before the Whitney Division Turbofan Engines available in the AD docket shortly after effective date of this AD, following Part II of AGENCY: Federal Aviation receipt. the Instructions in Piper Aircraft, Inc. Service Administration (FAA), DOT. Bulletin No. 1273, dated June 4, 2015. FOR FURTHER INFORMATION CONTACT: ACTION: Notice of proposed rulemaking Katheryn Malatek, Aerospace Engineer, (j) Alternative Methods of Compliance (NPRM). Engine Certification Office, FAA, Engine (AMOCs) SUMMARY: We propose to adopt a new & Propeller Directorate, 12 New England (1) The Manager, Atlanta Aircraft Executive Park, Burlington, MA 01803; airworthiness directive (AD) for certain Certification Office (ACO), FAA, has the phone: 781–238–7747; fax: 781–238– Pratt & Whitney Division (PW) authority to approve AMOCs for this AD, if 7199; email: katheryn.malatek@faa.gov. PW4000–94 inch and PW4000–100 inch requested using the procedures found in 14 model turbofan engines. This proposed SUPPLEMENTARY INFORMATION: CFR 39.19. In accordance with 14 CFR 39.19, AD was prompted by a report of a crack send your request to your principal inspector Comments Invited or local Flight Standards District Office, as find in the high-pressure compressor appropriate. If sending information directly (HPC) disk. This proposed AD would We invite you to send any written to the manager of the ACO, send it to the require performing an ultrasonic inspection (USI) or an eddy current relevant data, views, or arguments about attention of the person identified in Related this NPRM. Send your comments to an Information, paragraph (j)(1) of this AD. inspection (ECI) of the HPC 10th stage disk. We are proposing this AD to address listed under the ADDRESSES (2) Before using any approved AMOC, section. Include ‘‘Docket No. FAA– notify your appropriate principal inspector, prevent failure of the HPC 10th stage disk, an uncontained disk release, 2015–4474; Directorate Identifier 2015– or lacking a principal inspector, the manager NE–34–AD’’ at the beginning of your of the local flight standards district office/ damage to the engine, and damage to the airplane. comments. We specifically invite certificate holding district office. comments on the overall regulatory, DATES: We must receive comments on (k) Related Information economic, environmental, and energy this proposed AD by February 8, 2016. aspects of this NPRM. We will consider (1) For more information about this AD, ADDRESSES: You may send comments, contact Gregory ‘‘Keith’’ Noles, Aerospace all comments received by the closing using the procedures found in 14 CFR date and may amend this NPRM Engineer, FAA, Atlanta ACO, 1701 Columbia 11.43 and 11.45, by any of the following Avenue, College Park, Georgia 30337; phone: because of those comments. methods: (404) 474–5551; fax: (404) 474–5606; email: We will post all comments we • Federal eRulemaking Portal: Go to gregory.noles@faa.gov. receive, without change, to http:// http://www.regulations.gov. Follow the (2) For service information identified in www.regulations.gov, including any instructions for submitting comments. this AD, contact Piper Aircraft, Inc. 2926 • Fax: 202–493–2251. personal information you provide. We Piper Drive, Vero Beach, FL 32960; • Mail: U.S. Department of will also post a report summarizing each telephone: (415) 330–9500; email: sales@ substantive verbal contact we receive Transportation, Docket Operations, M– atp.com; and Internet: http://www.piper.com/ about this NPRM. 30, West Building Ground Floor, Room technical-publications/. You may view this referenced service information at the FAA, W12–140, 1200 New Jersey Avenue SE., Discussion Small Airplane Directorate, 901 Locust, Washington, DC 20590. Kansas City, Missouri 64106. For information • Hand Delivery: Deliver to Mail We propose to adopt a new AD for address above between 9 a.m. and 5 certain PW PW4000–94 inch turbofan on the availability of this material at the p.m., Monday through Friday, except engines with HPC 10th stage disk, part FAA, call (816) 329–4148. Federal holidays. number (P/N) 51H710 or 53H976–06, Issued in Kansas City, Missouri, on For service information identified in installed and certain PW4000–100 inch December 1, 2015. this proposed AD, contact Pratt & turbofan engines with HPC 10th stage Pat Mullen, Whitney Division, 400 Main St., East disk, P/N 53H976–06, installed. This Acting Manager, Small Airplane Directorate, Hartford, CT 06108; phone: (860) 565– proposed AD was prompted by a report Aircraft Certification Service. 8770; fax: (860) 565–4503. You may of a crack find in the HPC 10th stage [FR Doc. 2015–30882 Filed 12–8–15; 8:45 am] view this service information at the disk. The root cause of the crack was a BILLING CODE 4910–13–P FAA, Engine & Propeller Directorate, 12 manual polishing procedure, previously used during manufacture, that caused mstockstill on DSK4VPTVN1PROD with PROPOSALS New England Executive Park, Burlington, MA. For information on the surface scratches on the disk. This availability of this material at the FAA, proposed AD would require a USI or call (781) 238–7125. ECI of the HPC 10th stage disk. We are proposing this AD to prevent failure of Examining the AD Docket the HPC 10th stage disk, which could You may examine the AD docket on lead to an uncontained disk release, the Internet at http:// damage to the engine, and damage to the www.regulations.gov by searching for airplane. VerDate Sep<11>2014 16:34 Dec 08, 2015 Jkt 238001 PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 E:\FR\FM\09DEP1.SGM 09DEP1

Federal Register / Vol. 80, No. 236 / Wednesday, December 9, 2015 / Proposed Rules 76401 Related Service Information Under 1 substantial direct effect on the States, on (ii) HPC 10th stage disk, P/N 53H976–06, CFR Part 51 the relationship between the national with an S/N listed in Table 2 of PW ASB No. Government and the States, or on the PW4ENG A72–833, dated August 20, 2015. We reviewed PW Alert Service distribution of power and (2) This AD also applies to all PW PW4164, Bulletin (ASB) No. PW4G–100–A72– PW4168, PW4168A, PW4164C, PW4164C/B, 255, dated August 31, 2015 and PW responsibilities among the various levels of government. PW4170, PW4168A–1D, PW4168–1D, ASB No. PW4ENG A72–833, dated PW4164–1D, PW4164C–1D, and PW4164C/ August 20, 2015. The ASBs provide lists For the reasons discussed above, I B–1D turbofan engines with an HPC 10th of affected HPC disks and describe certify this proposed regulation: stage disk, P/N 53H976–06, with an S/N procedures for USI and ECI of the HPC (1) Is not a ‘‘significant regulatory listed Table 1 of PW ASB No. PW4G–100– 10th stage disk. This service information action’’ under Executive Order 12866, A72–255, dated August 31, 2015, installed. is reasonably available because the (2) Is not a ‘‘significant rule’’ under interested parties have access to it (d) Unsafe Condition the DOT Regulatory Policies and through their normal course of business Procedures (44 FR 11034, February 26, This AD was prompted by a report of a or by the means identified in the 1979), crack find in the HPC 10th stage disk. We are ADDRESSES section of this NPRM. (3) Will not affect intrastate aviation issuing this AD to prevent failure of the HPC in Alaska to the extent that it justifies 10th stage disk, an uncontained disk release, FAA’s Determination damage to the engine, and damage to the making a regulatory distinction, and We are proposing this NPRM because airplane. (4) Will not have a significant we evaluated all the relevant (e) Compliance economic impact, positive or negative, information and determined the unsafe on a substantial number of small entities Comply with this AD within the condition described previously is likely under the criteria of the Regulatory compliance times specified, unless already to exist or develop in other products of Flexibility Act. done. the same type design. (1) Whenever the high-pressure turbine Proposed AD Requirements List of Subjects in 14 CFR Part 39 (HPT) or low-pressure turbine (LPT) is This NPRM would require performing Air transportation, Aircraft, Aviation removed from the engine, perform an a USI or ECI of the HPC 10th stage disk. safety, Incorporation by reference, ultrasonic inspection (USI) of the HPC 10th Safety. stage disk for cracks. Remove from service Costs of Compliance any HPC 10th stage disk that fails inspection The Proposed Amendment and replace with a part eligible for We estimate that this proposed AD affects 763 engines installed on Accordingly, under the authority installation. airplanes of U.S. registry. We also delegated to me by the Administrator, (2) Whenever the HPC front drum rotor the FAA proposes to amend 14 CFR part disk assembly is removed from the engine, estimate that it would take about 12 perform an eddy current inspection (ECI) of hours per engine to do the inspection. 39 as follows: the HPC 10th stage disk for cracks. Remove The average labor rate is $85 per hour. PART 39—AIRWORTHINESS from service any HPC 10th stage disk that Based on these figures, we estimate the fails inspection and replace with a part cost of this proposed AD on U.S. DIRECTIVES eligible for installation. A USI as required by operators to be $778,260. paragraph (e)(1) of this AD is not required if ■ 1. The authority citation for part 39 Authority for This Rulemaking continues to read as follows: an ECI is performed. Title 49 of the United States Code Authority: 49 U.S.C. 106(g), 40113, 44701. (f) Alternative Methods of Compliance specifies the FAA’s authority to issue (AMOCs) rules on aviation safety. Subtitle I, § 39.13 [Amended] The Manager, Engine Certification Office, section 106, describes the authority of ■ 2. The FAA amends § 39.13 by adding FAA, may approve AMOCs for this AD. Use the FAA Administrator. Subtitle VII: the following new airworthiness the procedures found in 14 CFR 39.19 to Aviation Programs, describes in more directive (AD): make your request. You may email your detail the scope of the Agency’s Pratt & Whitney Division: Docket No. FAA– request to: ANE-AD-AMOC@faa.gov. authority. 2015–4474; Directorate Identifier 2015– (g) Related Information We are issuing this rulemaking under NE–34–AD. the authority described in Subtitle VII, (1) For more information about this AD, Part A, Subpart III, Section 44701: (a) Comments Due Date contact Katheryn Malatek, Aerospace ‘‘General requirements.’’ Under that We must receive comments by February 8, Engineer, Engine Certification Office, FAA, section, Congress charges the FAA with 2016. Engine & Propeller Directorate, 12 New promoting safe flight of civil aircraft in England Executive Park, Burlington, MA (b) Affected ADs 01803; phone: 781–238–7747; fax: 781–238– air commerce by prescribing regulations None. 7199; email: katheryn.malatek@faa.gov. for practices, methods, and procedures (c) Applicability (2) PW ASB No. PW4G–100–A72–255, the Administrator finds necessary for dated August 31, 2015 and PW ASB No. safety in air commerce. This regulation (1) This AD applies to all Pratt & Whitney PW4ENG A72–833, dated August 20, 2015, is within the scope of that authority Division (PW) PW4050, PW4052, PW4056, can be obtained from PW using the contact because it addresses an unsafe condition PW4060, PW4060A, PW4060C, PW4062, information in paragraph (g)(3) of this AD. PW4062A, PW4152, PW4156, PW4156A, mstockstill on DSK4VPTVN1PROD with PROPOSALS that is likely to exist or develop on (3) For service information identified in products identified in this rulemaking PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan engines, including models this AD, contact Pratt & Whitney Division, action. with a ‘‘–3’’ suffix, with one of the following 400 Main St., East Hartford, CT 06108; installed: phone: (860) 565–8770; fax: (860) 565–4503. Regulatory Findings (i) High-pressure compressor (HPC) 10th (4) You may view this service information We determined that this proposed AD stage disk, part number (P/N) 51H710, with at the FAA, Engine & Propeller Directorate, would not have federalism implications a serial number (S/N) listed in Table 1 of PW 12 New England Executive Park, Burlington, under Executive Order 13132. This Alert Service Bulletin (ASB) No. PW4ENG MA. For information on the availability of proposed AD would not have a A72–833, dated August 20, 2015; or this material at the FAA, call (781) 238–7125. VerDate Sep<11>2014 16:34 Dec 08, 2015 Jkt 238001 PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 E:\FR\FM\09DEP1.SGM 09DEP1

76402 Federal Register / Vol. 80, No. 236 / Wednesday, December 9, 2015 / Proposed Rules Issued in Burlington, Massachusetts, on 4076; or in person at the Docket separation of the riveted, two-piece roller December 3, 2015. Operations office between 9 a.m. and 5 retention cage. Radial location of the LP Colleen M. D’Alessandro, p.m., Monday through Friday, except turbine shaft was lost, allowing further Federal holidays. The AD docket progression of the event that resulted in a Directorate Manager, Engine & Propeller breach of the IP turbine casing. Directorate, Aircraft Certification Service. contains this proposed AD, the [FR Doc. 2015–30948 Filed 12–8–15; 8:45 am] mandatory continuing airworthiness RR introduced a modified LPT BILLING CODE 4910–13–P information (MCAI), the regulatory support roller bearing that can evaluation, any comments received, and withstand greater loads when an LPT other information. The address for the turbine blade release occurs, thereby DEPARTMENT OF TRANSPORTATION Docket Office (phone: 800–647–5527) is preventing LPT rotor movement. You in the ADDRESSES section. Comments may obtain further information by Federal Aviation Administration will be available in the AD docket examining the MCAI in the AD docket shortly after receipt. on the Internet at http:// 14 CFR Part 39 FOR FURTHER INFORMATION CONTACT: www.regulations.gov by searching for [Docket No. FAA–2015–4076; Directorate Brian Kierstead, Aerospace Engineer, and locating Docket No. FAA–2015– Identifier 2015–NE–30–AD] Engine Certification Office, FAA, Engine 4076. & Propeller Directorate, 12 New England FAA’s Determination and Requirements RIN 2120–AA64 Executive Park, Burlington, MA 01803; of This Proposed AD Airworthiness Directives; Rolls-Royce phone: 781–238–7772; fax: 781–238– 7199; email: brian.kierstead@faa.gov. This product has been approved by plc Turbofan Engines the aviation authority of the United SUPPLEMENTARY INFORMATION: AGENCY: Federal Aviation Kingdom, and is approved for operation Administration (FAA), DOT. Comments Invited in the United States. Pursuant to our We invite you to send any written bilateral agreement with the European ACTION: Notice of proposed rulemaking relevant data, views, or arguments about Community, EASA has notified us of (NPRM). this proposed AD. Send your comments the unsafe condition described in the SUMMARY: We propose to adopt a new to an address listed under the MCAI. We are proposing this AD airworthiness directive (AD) for certain ADDRESSES section. Include ‘‘Docket No. because we evaluated all information Rolls-Royce plc (RR) RB211–22B and FAA–2015–4076; Directorate Identifier provided by EASA and determined the RB211–524 turbofan engines with low- 2015–NE–30–AD’’ at the beginning of unsafe condition exists and is likely to pressure turbine (LPT) support roller your comments. We specifically invite exist or develop on other products of the bearing, part number (P/N) LK30313 or comments on the overall regulatory, same type design. This proposed AD P/N UL29651, installed. This proposed economic, environmental, and energy would require removal from service of AD was prompted by a report of a aspects of this proposed AD. We will the affected LPT support bearings. breach of the turbine casing and release consider all comments received by the Costs of Compliance of engine debris. This proposed AD closing date and may amend this would require removal of certain LPT We estimate that this proposed AD proposed AD based on those comments. support roller bearings installed in RR affects 9 engines installed on airplanes We will post all comments we RB211–22B and RB211–524 engines. We of U.S. registry. We also estimate it receive, without change, to http:// are proposing this AD to prevent failure would take 0 hours to comply with this www.regulations.gov, including any of the LPT support roller bearing, loss proposed AD since the proposed actions personal information you provide. We of radial position following LPT blade required by the AD would be performed will also post a report summarizing each failure, uncontained part release, during a shop visit, when major engine substantive verbal contact with FAA damage to the engine, and damage to the flanges are separated, which requires personnel concerning this proposed AD. airplane. the removal of the LPT support roller Discussion bearing. Therefore, no additional time is DATES: We must receive comments on needed to remove it. Parts would cost this proposed AD by February 8, 2016. The European Aviation Safety Agency (EASA), which is the Technical Agent about $8,184 per engine. The average ADDRESSES: You may send comments by labor rate is $85 per hour. Based on for the Member States of the European any of the following methods: Community, has issued EASA AD 2015– these figures, we estimate the cost of • Federal eRulemaking Portal: Go to 0187, dated September 9, 2015 (referred this proposed AD on U.S. operators to http://www.regulations.gov. Follow the to hereinafter as ‘‘the MCAI’’), to correct be $73,656. instructions for submitting comments. an unsafe condition for the specified • Mail: Docket Management Facility, Authority for This Rulemaking products. The MCAI states: U.S. Department of Transportation, 1200 Title 49 of the United States Code New Jersey Avenue SE., West Building An RB211–524G2–T engine experienced an specifies the FAA’s authority to issue in-service event that resulted in breach of a rules on aviation safety. Subtitle I, Ground Floor, Room W12–140, turbine casing and some release of core Washington, DC 20590–0001. engine debris through a hole in the engine section 106, describes the authority of • Hand Delivery: Deliver to Mail nacelle. The investigation of the event the FAA Administrator. ‘‘Subtitle VII: address above between 9 a.m. and 5 determined the primary cause to have been Aviation Programs,’’ describes in more detail the scope of the Agency’s mstockstill on DSK4VPTVN1PROD with PROPOSALS p.m., Monday through Friday, except fracture and release of a Low Pressure (LP) Federal holidays. turbine stage 2 blade. The blade release authority. • Fax: 202–493–2251. caused secondary damage to the LP turbine, We are issuing this rulemaking under producing significant out-of-balance forces. the authority described in ‘‘Subtitle VII, Examining the AD Docket The event engine was fitted with an LP Part A, Subpart III, Section 44701: turbine support bearing where the roller You may examine the AD docket on retention cage is constructed from two halves General requirements.’’ Under that the Internet at http:// that are riveted together. The LP turbine section, Congress charges the FAA with www.regulations.gov by searching for imbalance resulted in an overload of the LP promoting safe flight of civil aircraft in and locating Docket No. FAA–2015– turbine support bearing and caused air commerce by prescribing regulations VerDate Sep<11>2014 16:34 Dec 08, 2015 Jkt 238001 PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 E:\FR\FM\09DEP1.SGM 09DEP1


Document Created: 2015-12-14 13:32:49
Document Modified: 2015-12-14 13:32:49
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 February 8, 2016.
ContactKatheryn Malatek, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7747; fax: 781-238-7199; email: [email protected]
FR Citation80 FR 76400 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety
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