AD 2021-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Turbofan | Airworthiness Directives; Pratt & Whitney Turbofan Engines |
Unsafe Condition
Failure of the low-pressure compressor (LPC) rotor 1 (R1) due to cracking, leading to in-flight shutdowns.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform initial and repetitive borescope inspections (BSIs) of the LPC R1 for damage and cracks, and replace the LPC R1 if necessary. Replace or modify the electronic engine control (EEC) to incorporate EEC FADEC software version V2.11.10.4 or V9.5.6.7. Perform a BSI of the LPC R1 after installation of the updated EEC FADEC software if certain Onboard Maintenance Message fault codes are displayed and meet specified criteria.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.