Airworthiness Directives; International Aero Engines AG Engines; Correction

[Federal Register Volume 91, Number 174 (Thursday, September 10, 2026)]
[Rules and Regulations]
[Pages 57491-57492]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2026-18423]



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Federal Register / Vol. 91, No. 174 / Thursday, September 10, 2026 / 
Rules and Regulations

[[Page 57491]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-2555; Project Identifier AD-2025-00433-E; 
Amendment 39-23446; AD 2026-17-03]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines AG Engines; 
Correction

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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

SUMMARY: The FAA is correcting an airworthiness directive (AD) that was 
published in the Federal Register. That AD applies to certain 
International Aero Engines AG (IAE AG) Model V2522-A5, V2524-A5, V2525-
D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and 
V2533-A5 engines. As published, paragraph (g) of the regulatory text 
contains a typographical error. This document corrects that error. In 
all other respects, the original document remains the same.

DATES: This correction is effective September 24, 2026. The effective 
date of AD 2026-17-03 remains September 24, 2026.

ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov 
under Docket No. FAA-2025-2555; 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; correction, any 
comments received, and other information. The address for Docket 
Operations is U.S. Department of Transportation, Docket Operations, M-
30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue 
SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Carol Nguyen, Aviation Safety 
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: 
(781) 238-7655; email: [email protected].

SUPPLEMENTARY INFORMATION:

Background

    AD 2026-17-03, Amendment 39-23446 (91 FR 53713, August 20, 2026) 
(AD 2026-17-03), requires replacement of affected 3rd stage High 
Pressure Compressor (HPC) rotor blades with parts eligible for 
installation for certain IAE AG Model V2522-A5, V2524-A5, V2525-D5, 
V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and 
V2533-A5 engines.

Need for the Correction

    As published, paragraph (g) of AD 2026-17-03 contains a 
typographical error. The word ``blade'' was inadvertently omitted from 
the final regulatory text. Paragraph (g) of AD 2026-17-03 should read, 
``. . . where the 3rd stage HPC rotor blade is exposed . . .,'' which 
is consistent with the intent of the proposed AD (90 FR 51600, November 
18, 2025).

Correction of Publication

    This document corrects an error and correctly adds the AD as an 
amendment to 14 CFR 39.13. Although no other part of the preamble or 
regulatory information has been corrected, the FAA is publishing the 
entire rule in the Federal Register.
    The effective date of this AD remains September 24, 2026.
    Since this action only corrects the typographical error, it has no 
adverse economic impact and imposes no additional burden on any person. 
Therefore, the FAA has determined that notice and public procedures are 
unnecessary.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the FAA amends part 39 of the Federal Aviation 
Regulations (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   [Corrected]

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

2026-17-03 International Aero Engines AG: Amendment 39-23446; Docket 
No. FAA-2025-2555; Project Identifier AD-2025-00433-E.

(a) Effective Date

    This airworthiness directive (AD) is effective September 24, 
2026.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to International Aero Engines AG (IAE AG) Model 
V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-
D5, V2530-A5, V2531-E5, and V2533-A5 engines with a 3rd stage high-
pressure compressor (HPC) rotor blade having part number (P/N) 
6A8353 or P/N 6A8688 installed.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by multiple reports of failed 3rd stage HPC 
rotor blades that resulted in engine fires, unplanned engine 
removals, aborted takeoffs, and in-flight shutdowns (IFSD). The FAA 
is issuing this AD to prevent failure of the 3rd stage HPC rotor 
blades. The unsafe condition, if not addressed, could result in 
engine fire, reduced control of the airplane, and engine IFSD.

(f) Compliance

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

(g) Required Actions

    At the next engine shop visit after the effective date of this 
AD where the 3rd stage HPC rotor blade is exposed, replace the full 
set of 3rd stage HPC rotor blades with parts eligible for 
installation.

(h) Definitions

    (1) For the purpose of this AD, a ``part eligible for 
installation'' is:
    (i) A 3rd stage HPC rotor blade having P/N 6C8368, 6C8403, or 
later approved P/N; or
    (ii) A 3rd stage HPC rotor blade modified to P/N 6A8353-001 or 
P/N 6A8688-001.

[[Page 57492]]

    (2) For the purpose of this AD, a ``3rd stage HPC rotor blade 
exposure'' is when any 3rd stage HPC rotor blade is removed from the 
HPC stage 3 to 8 drum.
    (3) For the purpose of this AD, an ``engine shop visit'' is the 
induction of an engine into the shop for maintenance.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, AIR-520 Continued Operational Safety 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 AIR-520 Continued 
Operational Safety Branch, send it to the attention of the person 
identified in paragraph (j) of this AD and email to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(j) Additional Information

    For more information about this AD, contact Carol Nguyen, 
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, 
WA 98198; phone: (781) 238-7655; email: [email protected].

(k) Material Incorporated by Reference

    None.

    Issued on September 4, 2026.
Brian Knaup,
Acting Deputy Director, Integrated Certificate Management Division, 
Aircraft Certification Service.
[FR Doc. 2026-18423 Filed 9-9-26; 8:45 am]
BILLING CODE 4910-13-P

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