airworthiness · Rule · Final rule. · Published 2010-10-08 · Effective 2010-11-12 · 75 FR 62319
Document
Document number
2010-25391
Federal Register citation
75 FR 62319
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2010-10-08
Effective date
2010-11-12
FAA docket
Docket No. FAA-2010-0514
Abstract
The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney (PW) JT8D-9, -9A, -11, -15, -17, and -17R turbofan engines. This AD requires overhauling fan blade leading edges at the first shop visit after 4,000 cycles-in-service (CIS) since the last total fan blade overhaul was performed. This AD results from reports of failed fan blades. We are issuing this AD to prevent high-cycle fatigue cracking at the blade root, which could result in uncontained failures of first stage fan blades and damage to the airplane.