airworthiness · Rule · Final rule. · Published 2016-04-27 · Effective 2016-06-01 · 81 FR 24696
Document
Document number
2016-09687
Federal Register citation
81 FR 24696
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2016-04-27
Effective date
2016-06-01
FAA docket
Docket No. FAA-2015-4474
Abstract
We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4000-94 inch and PW4000-100 inch model turbofan engines. This AD was prompted by a report of a crack found in the high-pressure compressor (HPC) 10th stage disk. This AD requires performing an ultrasonic inspection (USI) or an eddy current inspection (ECI) of the HPC 10th stage disk. We are issuing this AD to prevent failure of the HPC 10th stage disk, uncontained disk release, damage to the engine, and damage to the airplane.