SUPPLEMENTARY INFORMATION:

Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2009-04-13, Amendment 39-15819 (74 FR 7643, February 19, 2009) (AD 2009-04-13). AD 2009-04-13 applied to RRD Model BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 engines, with an LPC compressor (fan) disc assembly, part number (P/N) BRH10048 or P/N BRH19253. AD 2009-04-13 required revising the ALS of the operator's existing approved engine maintenance or inspection program, as applicable, to incorporate new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts. Additionally, AD 2009-04-13 required removing LPC compressor (fan) disc assemblies from service that exceed a certain life limit, removing LPC compressor (fan) disc assemblies from service that do not pass the Hawaiian Flight Mission check, and completing the Life Limited Part Tracking Sheet. The FAA issued AD 2009-04-13 to prevent failure of critical rotating parts, which, if not addressed, could result in uncontained failure of the LPC (fan) disc assembly and damage to the airplane.

The NPRM was published in the Federal Register on July 6, 2026 (91 FR 40900). The NPRM was prompted by EASA AD 2025-0086, dated April 16, 2025 (EASA AD 2025-0086) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union. The MCAI states that the manufacturer published a revised engine TLM to introduce new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts.

In the NPRM, the FAA proposed to require revising the ALS of the existing approved engine maintenance or inspection program, as applicable, to incorporate new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts.

Discussion of Final Airworthiness Directive

Comments

The FAA received comments from two commenters. Commenters included the Air Line Pilots Association, International and The Boeing Company. All commenters supported the NPRM without change.

Conclusion

These products have been approved by the civil aviation authority of another country and are approved for operation in the United States. Pursuant to the FAA's bilateral agreement with this State of Design Authority, that authority has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA reviewed the relevant data, considered any comments received, and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Except for minor editorial changes, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator.

Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed EASA AD 2025-0086, which specifies revising the ALS of the existing approved engine maintenance or inspection program, as applicable, to incorporate new or more restrictive tasks and limitations and associated thresholds and intervals for life-limited parts.

This material 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.

Differences Between This AD and the MCAI

Where paragraph (3) of EASA AD 2025-0086 specifies revising the approved Aircraft Maintenance ( printed page 65963) Programme (AMP) within 12 months after the effective date of EASA AD 2025-0086, this AD requires revising the ALS of the existing approved engine maintenance or inspection program, as applicable, within 30 days after the effective date of this AD.

Costs of Compliance

The FAA estimates that this AD affects 218 engines installed on airplanes of U.S. registry.

The FAA estimates the following costs to comply with this AD:

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 has determined that this AD will not have federalism implications under Executive Order 13132. This AD will 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 that this AD:

(1) Is not a “significant regulatory action” under Executive Order 12866,

(2) Will not affect intrastate aviation in Alaska, and

(3) 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.

The Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: