2024-26092. Airworthiness Directives; International Aero Engines AG Engines

Estimated Costs

Action	Labor cost	Parts cost	Cost per product	Cost on U.S. operators
Revise the ALS	1 work-hour × $85 per hour = $85	$0	$85	$128,690

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.

The FAA is 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

The FAA 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) Would not affect intrastate aviation in Alaska, and

(3) Would 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:

International Aero Engines AG: Docket No. FAA-2024-2423; Project Identifier AD-2024-00320-E.

(a) Comments Due Date

The FAA must receive comments on this airworthiness directive (AD) by December 27, 2024.

(b) Affected ADs

None. ( print page 88910)

(c) Applicability

This proposed AD applies to International Aero Engines (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.

(d) Subject

Joint Aircraft System Component (JASC) Code 7250, Turbine Engine Compressor Sections.

(e) Unsafe Condition

This AD was prompted by further analysis of an event involving an IAE AG model V2533-A5 engines that experienced an uncontained high-pressure turbine (HPT) 1st-stage hub failure that resulted in high-energy debris penetrating the engine cowling. The FAA is issuing this AD to prevent failure of the HPT 1st-stage hub and HPT 2nd-stage hub. The unsafe condition, if not addressed, could result in an uncontained hub failure, release of high-energy debris, damage to the engine, damage to the airplane, and loss of the airplane.

(f) Compliance

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

(g) Required Action

Within 90 days after the effective date of this AD; revise the “Maintenance Scheduling” paragraph of the Airworthiness Limitations Section (ALS) of the existing approved engine maintenance manual (EMM) or instructions for continued airworthiness and your existing approved maintenance or inspection program, as applicable; by incorporating the information specified in table 1 to paragraph (g) of this AD, as applicable.

Table 1 to Paragraph ( g )—ALS Additional Inspections

Part nomenclature	Part No.	Inspection (engine manual reference)
HPT Stage 1 Hub	2A5001	TASK 72-45-11-200-006.
HPT Stage 2 Hub	2A4802	TASK 72-45-11-200-009.