Airworthiness Directives; Honeywell International Inc. Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2011-11-29 · Effective 2011-12-14 · 76 FR 73489
Document
Document number
2011-30575
Federal Register citation
76 FR 73489
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Honeywell International Inc. Turbofan
Publication date
2011-11-29
Effective date
2011-12-14
FAA docket
Docket No. FAA-2011-1261
Abstract
We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. ALF502L-2C, ALF502R-3, ALF502R-3A, ALF502R-5, LF507-1F, and LF507-IH turbofan engines. This AD requires removing from service certain second stage high pressure compressor (HPC2) discs. This AD was prompted by a report of cracks found in an HPC2 disc during routine inspection. We are issuing this AD to prevent the affected discs from fracturing before reaching the currently published life limit. A disc fracture could result in an uncontained failure of the disc and damage to the airplane.