airworthiness · Rule · Final rule. · Published 2015-10-28 · Effective 2015-12-02 · 80 FR 65925
Document
Document number
2015-21729
Federal Register citation
80 FR 65925
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Rolls-Royce plc Turbofan
Publication date
2015-10-28
Effective date
2015-12-02
FAA docket
Docket No. FAA-2015-0593
Abstract
We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4- C-37 turbofan engines. This AD requires reducing the cyclic life limits for certain high-pressure turbine (HPT) disks, removing those disks that have exceeded the new life limit, and replacing them with serviceable parts. This AD was prompted by RR updating the life limits for certain HPT disks. We are issuing this AD to prevent failure of the HPT disk, which could result in uncontained disk release, damage to the engine, and damage to the airplane.