NPRM FAA-2011-0731

Became AD 2011-25-10

Proposed airworthiness directive · Pratt & Whitney Division

Open in Federal Register Comment on regulations.gov

Published: July 13, 2011 · 76 FR 41144
Comments due: August 29, 2011
Action: Notice of proposed rulemaking (NPRM)
Became: AD2011-25-10
Docket: FAA-2011-0731
Project: 2010-NE-39-AD
FR document: 2011-17622
Products: Engine

A proposal is not in force. If adopted, it becomes an AD, usually with changes. Only the Federal Register edition is official.

Summary

We propose to adopt a new airworthiness directive (AD) for all PW JT9D-7R4H1 turbofan engines. This proposed AD would require removing certain high-pressure compressor (HPC) shafts before their certified life limits, and establishes a new, lower life-limit for these parts. This proposed AD was prompted by reports of cracks in five HPC shafts. We are proposing this AD to correct the unsafe condition on these products.

The resulting AD

AD 2011-25-10High-pressure compressor (HPC) shafts · Pratt & Whitney Division JT9D-7R4H1Effective Jan 17, 2012

Notices in this docket · 1

FR 2011-17622Notice of proposed rulemaking (NPRM)Published Jul 13, 2011 · comments due Aug 29, 2011