Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines

Proposed RulePublished August 17, 2026Comments close October 1, 2026Federal Aviation Administration

Comment deadline

October 1, 2026

Comments submitted through the official docket become part of the federal record. Agencies are required to review and respond to substantive comments.

Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent XWB-75, XWB-79, XWB-79B, and XWB-84 engines. This proposed AD was prompted by reports of differential oil pressure measurements that were lower than expected on in-service engines. This proposed AD would require modification of the engine with an improved front bearing housing oil feed tube assembly. This proposed AD would also prohibit the installation of an affected front bearing housing oil feed tube assembly on any engine. The FAA is proposing this AD to address the unsafe condition on these products.

Document details

Document number2026-16705

Issuing agencyTransportation Department

PublishedAugust 17, 2026

Comment period closesOctober 1, 2026

Read the full rule on FederalRegister.gov

Source: Federal Register · as of Aug 21, 2026