airworthiness · Rule · Final rule; request for comments. · Published 2003-06-30 · Effective 2003-07-15 · 68 FR 38592
Document
Document number
03-15992
Federal Register citation
68 FR 38592
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2003-06-30
Effective date
2003-07-15
FAA docket
Docket No. 2003-NE-24-AD
Abstract
The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney (PW) PW4074, PW4074D, PW4077, PW4077D, PW4090, and PW4090-3 turbofan engines with high pressure compressor (HPC) rear cases, part numbers (P/Ns) 55H425-01, 55H385-01, and 56H396-01 installed. This AD requires initial and repetitive visual or fluorescent penetrant inspections (FPI) of the J flange on the HPC rear case, and removal from service of the rear case based on certain inspection results. This AD is prompted by reports of cracks propagating from bolt holes in the HPC rear case J flange, and reports of high-cycle HPC rear cases exhibiting cracks propagating into the shell wall. The actions specified in this AD are intended to prevent fracturing and rupturing of the HPC rear case, resulting in uncontained engine failure.