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Rules and Regulations
Federal Register Vol. 86, No. 125
Friday, July 2, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210509; Project Identifier AD202100608E; Amendment 3921626; AD 20211151
RIN 2120AA64

Airworthiness Directives; International Aero Engines AG Turbofan Engines Federal Aviation Administration FAA, DOT.
ACTION: Final rule; request for comments.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain International Aero Engines AG IAE
V2522A5, V2524A5, V2527A5, V2527EA5, V2527MA5, V2530A5, and V2533A5 model turbofan engines.
This AD was prompted by a review of investigative findings from an event involving an uncontained failure of a high-pressure turbine HPT 1st-stage disk that resulted in high-energy debris penetrating the engine cowling. This AD
requires an ultrasonic inspection USI
of affected HPT 1st-stage disks and HPT
2nd-stage disks and, depending on the results of the USI, removal of the affected HPT 1st-stage and HPT 2ndstage disks from service. The FAA
previously sent an emergency AD to all known U.S. owners and operators of these engines and is now issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective July 19, 2021. Emergency AD 20211151, issued on May 21, 2021, which contained the requirements of this amendment, was effective with actual notice.
The Director of the Federal Register approved the incorporation by reference of certain publications identified in this AD as of July 13, 2021 86 FR 30380, June 8, 2021.

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SUMMARY:

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The FAA must receive comments on this AD by August 16, 2021.
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 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 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 final rule, contact: International Aero Engines AG, 400 Main Street, East Hartford, CT 06118; phone: 860 565
2391; email: help24@pw.utc.com;
website: http fleetcare.pw.utc.com.
You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA
01803. For information on the availability of this material at the FAA, call 781 2387759. It is also available at https www.regulations.gov by searching for and locating Docket No.
FAA20210509.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210509; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Alberto Hernandez, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
phone: 781 2387329; fax: 781 238
7999; email: Alberto.J.Hernandez@
faa.gov.
SUPPLEMENTARY INFORMATION:
Background On May 21, 2021, the FAA issued Emergency AD 20211151 the emergency AD, which requires a USI of affected HPT 1st-stage disks and HPT
2nd-stage disks installed on IAE V2522

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A5, V2524A5, V2527A5, V2527EA5, V2527MA5, V2530A5, and V2533A5
model turbofan engines and, depending on the results of the USI, removal of the affected HPT disks from service. The FAA sent the emergency AD to all known U.S. owners and operators of these engines. That action was prompted by a review of investigative findings from an event involving an uncontained failure of an HPT 1st-stage disk that resulted in high-energy debris penetrating the engine cowling. This condition, if not addressed, could result in uncontained HPT failure, release of high-energy debris, damage to the engine, damage to the airplane, and loss of the airplane.
FAAs Determination The FAA is issuing this AD because the agency 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.
Related Service Information Under 1
CFR Part 51
The FAA reviewed IAE NonModification Service Bulletin NMSB
V2500ENG720713, Revision 1, dated January 26, 2021 IAE NMSB V2500
ENG720713. IAE NMSB V2500
ENG720713 specifies procedures for performing an ultrasonic inspection of the HPT 1st-stage disk and the HPT 2ndstage disk installed on IAE V2500A5
and V2500D5 series engines.
The FAA also reviewed IAE NMSB
V2500E5720015, dated December 15, 2020 IAE NMSB V2500E572
0015. IAE NMSB V2500E5720015
specifies procedures for performing an ultrasonic inspection of the HPT 1ststage disk and the HPT 2nd-stage disk installed on V2500E5 series engines.
The Director of the Federal Register approved IAE NMSB V2500ENG72
0713 and IAE NMSB V2500E572
0015 for incorporation by reference as of July 13, 2021 86 FR 30380, June 8, 2021. 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 ADDRESSES.
AD Requirements This AD requires a USI of affected HPT 1st-stage disks and HPT 2nd-stage disks installed on IAE V2522A5,
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