Airworthiness Directives; International Aero Engines AG Turbofan Engines, 21768-21770 [2016-08462]

Download as PDF 21768 Federal Register / Vol. 81, No. 71 / Wednesday, April 13, 2016 / Proposed Rules (g) Modifications (1) For all airplanes: Within 12 months after the effective date of this AD, modify each MLG access door by installing an improved fairing seal, in accordance with the Accomplishment Instructions of EADS CASA Service Bulletin SB–235–52–0068, Revision 2, dated January 9, 2015. (2) For all Model CN–235–200 airplanes: Concurrently with the action required in paragraph (g)(1) of this AD, modify each affected MLG access door by installing an additional bolt, in accordance with the Accomplishment Instructions of EADS CASA Service Bulletin SB–235–52–0061, Revision 1, dated October 24, 2014. (h) Credit for Previous Actions (1) This paragraph provides credit for actions required by paragraph (g)(1) of this AD, if those actions were performed before the effective date of this AD, using EADS CASA Service Bulletin SB–235–52–0068, Revision 1, dated October 24, 2014; or SB– 235–52–0068, dated July 15, 2002; which are not incorporated by reference in this AD. (2) This paragraph provides credit for actions required by paragraph (g)(2) of this AD, if those actions were performed before the effective date of this AD using EADS CASA Service Bulletin SB–235–52–0061, dated October 31, 1996, which is not incorporated by reference in this AD. jstallworth on DSK7TPTVN1PROD with PROPOSALS (i) Parts Installation Prohibition and Limitation (1) For airplanes modified as specified in paragraphs (g)(1) and (g)(2) of this AD, as applicable, before the effective date of this AD: As of the effective date of this AD, no person may install a seal having part number CAN36032R on any MLG access door. (2) For airplanes not modified as specified in paragraphs (g)(1) and (g)(2) of this AD, as applicable, before the effective date of this AD: After accomplishing the actions required by paragraphs (g)(1) and (g)(2) of this AD, as applicable, no person may install a seal having part number CAN36032R on any MLG access door. (3) As of the effective date of this AD, installation of a MLG access door on an airplane is allowed, provided the MLG access door is modified as required by paragraphs (g)(1) and (g)(2) of this AD, as applicable. (j) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM–116, Transport Airplane Directorate, 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 International Branch, send it to ATTN: Shahram Daneshmandi, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057–3356; telephone 425–227–1112; fax 425–227–1149. Before using any approved AMOC, notify VerDate Sep<11>2014 14:59 Apr 12, 2016 Jkt 238001 your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. The AMOC approval letter must specifically reference this AD. (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, International Branch, ANM– 116, Transport Airplane Directorate, FAA; or the European Aviation Safety Agency (EASA); or Airbus Defense and Space S.A.’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. Federal Aviation Administration pressure turbine (HPT) seal release. This proposed AD would require removing from service the HPT No. 4 bearing front seal seat, part numbers (P/Ns) 2A0066, 2A1998, and 2A3432, and the HPT No. 4 bearing rear seal seat, P/Ns 2A0067, 2A1999, and 2A3433, and replacement with parts eligible for installation. This proposed AD would also require inspecting the HPT rotor and stator assembly, and, if necessary, their replacement with parts that are eligible for installation. We are proposing this AD to prevent failure of the HPT stage 2 seals, uncontained HPT seal release, damage to the engine, and damage to the airplane. DATES: We must receive comments on this proposed AD by June 13, 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 https://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 International Aero Engines AG, 400 Main Street, East Hartford, CT 06118; phone: 800–565– 0140; email: help24@pw.utc.com; Internet: https://fleetcare.pw.utc.com. You may view this service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. 14 CFR Part 39 Examining the AD Docket (k) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA AD 2015–0225, dated November 18, 2015, for related information. You may examine the MCAI on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2016–5467. (2) For service information identified in this AD, contact EADS–CASA, Military Transport Aircraft Division (MTAD), Integrated Customer Services (ICS), ´ Technical Services, Avenida de Aragon 404, 28022 Madrid, Spain; telephone +34 91 585 55 84; fax +34 91 585 55 05; email MTA.TechnicalService@casa.eads.net; Internet https://www.eads.net. You may view this service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on March 31, 2016. Victor Wicklund, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2016–08350 Filed 4–12–16; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION [Docket No. FAA–2016–5392; Directorate Identifier 2016–NE–10–AD] RIN 2120–AA64 Airworthiness Directives; International Aero Engines AG Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for certain International Aero Engines AG (IAE) V2500–A1 turbofan engines. This proposed AD was prompted by a report of an uncontainment caused by a high- SUMMARY: PO 00000 Frm 00011 Fmt 4702 Sfmt 4702 You may examine the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2016– 5392; 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: Brian Kierstead, Aerospace Engineer, E:\FR\FM\13APP1.SGM 13APP1 Federal Register / Vol. 81, No. 71 / Wednesday, April 13, 2016 / Proposed Rules Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781–238–7772; fax: 781–238–7199; email: brian.kierstead@faa.gov. 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– 2016–5392; Directorate Identifier 2016– NE–10–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 https:// 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 an uncontained part release which breached an HPT case. This event resulted in an engine fire and exhaust gas temperature over-limit readings. Subsequent investigation has shown that the preliminary cause was blockage at the No. 4 bearing seal seat anti-weep grooves. Blockage of these grooves could allow oil to escape the No. 4 compartment and migrate to the HPT. Oil migration to the HPT could result in oil ignition and could eventually result in a stage 2 air-seal fracture. This condition, if not corrected, could result in failure of the HPT stage 2 seals, uncontained HPT seal release, damage to the engine, and damage to the airplane. jstallworth on DSK7TPTVN1PROD with PROPOSALS Related Service Information Under 1 CFR Part 51 We reviewed IAE Non-Modification Service Bulletin (NMSB) V2500–ENG– 72–0670, dated March 14, 2016. The NMSB identifies affected engines and provides guidance for replacing the No. 4 bearing front and rear seal seats and for inspecting the HPT rotor and stator assembly. 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. VerDate Sep<11>2014 14:59 Apr 12, 2016 Jkt 238001 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 removing from service the HPT No. 4 bearing front seal seat, P/Ns 2A0066, 2A1998, and 2A3432, and the HPT No. 4 bearing rear seal seat, P/Ns 2A0067, 2A1999, and 2A3433, and replacement with parts eligible for installation. This proposed AD would also require inspecting the HPT rotor and stator assembly, and, if necessary, their replacement with parts that are eligible for installation. Costs of Compliance We estimate that this proposed AD affects 0 engines installed on airplanes of U.S. registry. We estimate that it would take about 10 hours to perform the seal seat replacement. The average labor rate is $85 per hour. We also estimate the cost of No. 4 bearing front and rear seal seats to be $13,562. Based on these figures, we estimate the cost of this proposed AD on U.S. operators to be $0. 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 PO 00000 Frm 00012 Fmt 4702 Sfmt 4702 21769 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 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ International Aero Engines AG: Docket No. FAA–2016–5392; Directorate Identifier 2016–NE–10–AD. (a) Comments Due Date We must receive comments by June 13, 2016. (b) Affected ADs None. (c) Applicability This AD applies to International Aero Engines AG (IAE) V2500–A1 turbofan engines with serial numbers listed in Effectivity Data of IAE Non-Modification Service Bulletin (NMSB) V2500–ENG–72– 0670, dated March 14, 2016. (d) Unsafe Condition This AD was prompted by a report of an uncontainment caused by a high-pressure turbine (HPT) seal release. We are issuing this AD to prevent failure of the HPT stage 2 seals, uncontained HPT seal release, damage to the engine, and damage to the airplane. (e) Compliance Comply with this AD within the compliance times specified, unless already done. E:\FR\FM\13APP1.SGM 13APP1 21770 Federal Register / Vol. 81, No. 71 / Wednesday, April 13, 2016 / Proposed Rules (1) Prior to accumulating 500 cycles in service after the effective date of this AD, (i) Remove from service No. 4 bearing front seal seat part numbers (P/Ns) 2A0066, 2A1998, 2A3432; and No. 4 bearing rear seal seat, P/Ns 2A0067, 2A1999, 2A3433, and replace with parts eligible for installation. (ii) Inspect the HPT rotor and stator assembly. Use the Accomplishment Instruction, Part C, Section 1.B of IAE NMSB V2500–ENG–72–0670, dated March 14, 2016 to perform the inspection. (2) For any parts that fail the inspection required by paragraph (e)(1)(ii) of this AD, before further flight, remove and replace with parts eligible for installation. (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: ANE-AD-AMOC@faa.gov. (g) Related Information (1) For more information about this AD, contact Brian Kierstead, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781–238– 7772; fax: 781–238–7199; email: brian.kierstead@faa.gov. (2) IAE NMSB V2500–ENG–72–0670, dated March 14, 2016, can be obtained from IAE, using the contact information in paragraph (g)(3) of this proposed AD. (3) For service information identified in this proposed AD, contact International Aero Engines AG, 400 Main Street, East Hartford, CT 06118; phone: 800–565–0140; email: help24@pw.utc.com; Internet: https:// fleetcare.pw.utc.com. (4) You may view this service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. Issued in Burlington, Massachusetts, on April 8, 2016. Colleen M. D’Alessandro, Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2016–08462 Filed 4–12–16; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Examining the AD Docket Federal Aviation Administration 14 CFR Part 39 jstallworth on DSK7TPTVN1PROD with PROPOSALS [Docket No. FAA–2016–5466; Directorate Identifier 2015–NM–183–AD] RIN 2120–AA64 Airworthiness Directives; Dassault Aviation Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: VerDate Sep<11>2014 14:59 Apr 12, 2016 Jkt 238001 We propose to adopt a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 7X airplanes. This proposed AD was prompted by investigation results that determined that a certain thickness of the fuel tank panels is insufficient to meet the certification requirements. This proposed AD would require inspecting the thickness of the fuel tank panels, and repair if necessary. We are proposing this AD to detect and correct improper thickness of the fuel tank panels. Improper thickness increases the risk of damaging and puncturing a fuel tank wall panel as a result of a high energy lightning strike, which could lead to loss of electrical power and/or other essential functions, possibly resulting in reduced control of the airplane or ignition of a fuel tank. DATES: We must receive comments on this proposed AD by May 31, 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 https://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 Dassault Falcon Jet Corporation, Teterboro Airport, P.O. Box 2000, South Hackensack, NJ 07606; telephone 201–440–6700; Internet https://www.dassaultfalcon.com. You may view this referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. SUMMARY: You may examine the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2016– 5466; 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 Operations office (telephone 800–647–5527) is in the ADDRESSES section. Comments will PO 00000 Frm 00013 Fmt 4702 Sfmt 4702 be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057–3356; telephone 425–227–1137; fax 425–227–1149. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2016–5466; Directorate Identifier 2015–NM–183–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union, has issued EASA Airworthiness Directive 2015–0216, dated October 28, 2015 (referred to after this as the Mandatory Continuing Airworthiness Information, or ‘‘the MCAI’’), to correct an unsafe condition for certain Dassault Aviation Model FALCON 7X airplanes. The MCAI states: Several rear fuselage tanks of the Falcon 7X were assembled on the production line with a lateral panel, which had been excessively chemically-milled in some areas. Investigation results determined that the remaining thickness is insufficient to meet the certification requirements. Dassault Aviation identified the individual aeroplanes that are potentially affected by this production deficiency. Due to this reduced thickness, the risk of damaging and puncturing a fuel tank wall panel as a result of a high energy lightning strike is increased. This condition, if not detected and corrected, could lead to loss of electrical power and/or other essential functions, possibly resulting in reduced control of the aeroplane or ignition of a fuel tank. To address this potential unsafe condition, Dassault Aviation published Service Bulletin (SB) 7X–245 to provide inspection and repair instructions. For the reasons described above, this [EASA] AD requires a one-time inspection of E:\FR\FM\13APP1.SGM 13APP1

Agencies

[Federal Register Volume 81, Number 71 (Wednesday, April 13, 2016)]
[Proposed Rules]
[Pages 21768-21770]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-08462]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-5392; Directorate Identifier 2016-NE-10-AD]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines AG Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain International Aero Engines AG (IAE) V2500-A1 turbofan engines. 
This proposed AD was prompted by a report of an uncontainment caused by 
a high-pressure turbine (HPT) seal release. This proposed AD would 
require removing from service the HPT No. 4 bearing front seal seat, 
part numbers (P/Ns) 2A0066, 2A1998, and 2A3432, and the HPT No. 4 
bearing rear seal seat, P/Ns 2A0067, 2A1999, and 2A3433, and 
replacement with parts eligible for installation. This proposed AD 
would also require inspecting the HPT rotor and stator assembly, and, 
if necessary, their replacement with parts that are eligible for 
installation. We are proposing this AD to prevent failure of the HPT 
stage 2 seals, uncontained HPT seal release, damage to the engine, and 
damage to the airplane.

DATES: We must receive comments on this proposed AD by June 13, 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 https://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 
International Aero Engines AG, 400 Main Street, East Hartford, CT 
06118; phone: 800-565-0140; email: help24@pw.utc.com; Internet: https://fleetcare.pw.utc.com. You may view this service information at the FAA, 
Engine & Propeller Directorate, 1200 District Avenue, 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 https://www.regulations.gov by searching for and locating Docket No. FAA-2016-
5392; 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: Brian Kierstead, Aerospace Engineer,

[[Page 21769]]

Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 
District Avenue, Burlington, MA 01803; phone: 781-238-7772; fax: 781-
238-7199; email: brian.kierstead@faa.gov.

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-2016-5392; 
Directorate Identifier 2016-NE-10-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 https://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 an uncontained part release which breached 
an HPT case. This event resulted in an engine fire and exhaust gas 
temperature over-limit readings. Subsequent investigation has shown 
that the preliminary cause was blockage at the No. 4 bearing seal seat 
anti-weep grooves. Blockage of these grooves could allow oil to escape 
the No. 4 compartment and migrate to the HPT. Oil migration to the HPT 
could result in oil ignition and could eventually result in a stage 2 
air-seal fracture. This condition, if not corrected, could result in 
failure of the HPT stage 2 seals, uncontained HPT seal release, damage 
to the engine, and damage to the airplane.

Related Service Information Under 1 CFR Part 51

    We reviewed IAE Non-Modification Service Bulletin (NMSB) V2500-ENG-
72-0670, dated March 14, 2016. The NMSB identifies affected engines and 
provides guidance for replacing the No. 4 bearing front and rear seal 
seats and for inspecting the HPT rotor and stator assembly. 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 removing from service the HPT No. 4 
bearing front seal seat, P/Ns 2A0066, 2A1998, and 2A3432, and the HPT 
No. 4 bearing rear seal seat, P/Ns 2A0067, 2A1999, and 2A3433, and 
replacement with parts eligible for installation. This proposed AD 
would also require inspecting the HPT rotor and stator assembly, and, 
if necessary, their replacement with parts that are eligible for 
installation.

Costs of Compliance

    We estimate that this proposed AD affects 0 engines installed on 
airplanes of U.S. registry. We estimate that it would take about 10 
hours to perform the seal seat replacement. The average labor rate is 
$85 per hour. We also estimate the cost of No. 4 bearing front and rear 
seal seats to be $13,562. Based on these figures, we estimate the cost 
of this proposed AD on U.S. operators to be $0.

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):

International Aero Engines AG: Docket No. FAA-2016-5392; Directorate 
Identifier 2016-NE-10-AD.

(a) Comments Due Date

    We must receive comments by June 13, 2016.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to International Aero Engines AG (IAE) V2500-A1 
turbofan engines with serial numbers listed in Effectivity Data of 
IAE Non-Modification Service Bulletin (NMSB) V2500-ENG-72-0670, 
dated March 14, 2016.

(d) Unsafe Condition

    This AD was prompted by a report of an uncontainment caused by a 
high-pressure turbine (HPT) seal release. We are issuing this AD to 
prevent failure of the HPT stage 2 seals, uncontained HPT seal 
release, damage to the engine, and damage to the airplane.

(e) Compliance

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

[[Page 21770]]

    (1) Prior to accumulating 500 cycles in service after the 
effective date of this AD,
    (i) Remove from service No. 4 bearing front seal seat part 
numbers (P/Ns) 2A0066, 2A1998, 2A3432; and No. 4 bearing rear seal 
seat, P/Ns 2A0067, 2A1999, 2A3433, and replace with parts eligible 
for installation.
    (ii) Inspect the HPT rotor and stator assembly. Use the 
Accomplishment Instruction, Part C, Section 1.B of IAE NMSB V2500-
ENG-72-0670, dated March 14, 2016 to perform the inspection.
    (2) For any parts that fail the inspection required by paragraph 
(e)(1)(ii) of this AD, before further flight, remove and replace 
with parts eligible for installation.

(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: ANE-AD-AMOC@faa.gov.

(g) Related Information

    (1) For more information about this AD, contact Brian Kierstead, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7772; fax: 781-238-7199; email: 
brian.kierstead@faa.gov.
    (2) IAE NMSB V2500-ENG-72-0670, dated March 14, 2016, can be 
obtained from IAE, using the contact information in paragraph (g)(3) 
of this proposed AD.
    (3) For service information identified in this proposed AD, 
contact International Aero Engines AG, 400 Main Street, East 
Hartford, CT 06118; phone: 800-565-0140; email: help24@pw.utc.com; 
Internet: https://fleetcare.pw.utc.com.
    (4) You may view this service information at the FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA. For 
information on the availability of this material at the FAA, call 
781-238-7125.

    Issued in Burlington, Massachusetts, on April 8, 2016.
Colleen M. D'Alessandro,
Manager, Engine & Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-08462 Filed 4-12-16; 8:45 am]
 BILLING CODE 4910-13-P
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