Summary
We are adopting a new airworthiness directive (AD) for certain PW4000 turbofan engines. This AD was prompted by an updated low-cycle fatigue (LCF) life analysis performed by PW. This AD requires removing certain part number (P/N) high-pressure turbine (HPT) stage 1 and HPT stage 2 airseals and HPT stage 1 airseal rings before their published life limit and establishes a new lower life limit for these parts. We are issuing this AD to prevent failure of these parts, which could lead to an uncontained engine failure and damage to the airplane.
Directive Details
AD Number
FAA-2011-0733
Document Number
2011-31177
Type
Rule
Publication Date
December 6, 2011
Effective Date
January 10, 2012
Affected Manufacturer
Pratt & Whitney Division (PW) PW4000 Series Turbofan
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2011-0733
Topics
Official Documents
Automated AD compliance tracking
AeroCopilot matches ADs to your aircraft and tracks compliance status. Included in every plan from $9.99 monthly.
Unlock AD-to-aircraft matching, compliance tracking, recurrence schedule with a free AeroCopilot account.
Sign up free to unlock AD-to-aircraft matching, compliance tracking, recurrence scheduleFree forever · No credit card · Sourced directly from FAA & NOAA pipelines