Superseded. This AD was superseded by AD 2021-09-10. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2012-04-15
Effective 04/23/2012 · Published 03/19/2012
Airworthiness Directives; Pratt & Whitney Turbofan Engines
Summary
We are superseding an existing airworthiness directive (AD) for all Pratt & Whitney (PW) JT9D series turbofan engines. That AD currently requires revisions to the Airworthiness Limitations Section (ALS) of the manufacturer's Instructions for Continued Airworthiness (ICA) to include required enhanced inspection of selected critical life-limited parts at each piece-part opportunity. This new AD requires additional rev…