Engine - Low Pressure Compressor Rotor 1 - Inspection / Installation / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2021-14-06
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform repetitive borescope inspections of the LPC rotor 1 until installing the updated EEC FADEC software and must conduct inspections if certain fault codes appear after software installation. They are required to replace LPC rotor 1 components based on inspection results and must remove and replace the compressor intermediate case assembly with an eligible redesigned part. Compliance with these actions is mandatory by August 19, 2022.
Summary
Federal Aviation Administration Airworthiness Directive 2022-15-03 is a final rule addressing Pratt & Whitney PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A turbofan engines. It mandates inspections and replacements related to the low-pressure compressor rotor 1 and requires installation of updated electronic engine control full authority digital electronic control software and a redesigned compressor intermediate case assembly. This directive aims to mitigate unsafe conditions caused by LPC rotor failures and software incompatibilities.
What changed
This AD supersedes AD 2021-14-06 and continues the requirement for repetitive borescope inspections of LPC rotor 1 until updated EEC FADEC software is installed. It introduces a requirement to replace the existing compressor intermediate case assembly with a redesigned version featuring a shortened bleed duct. Additionally, the AD updates the eligible EEC FADEC software version and revises inspection timing requirements based on operator feedback.
Why it matters
The directive addresses inflight shutdown risks caused by cracked LPC rotor 1 components, enhancing engine safety and reliability. Compliance ensures operators avoid unplanned maintenance and potential safety incidents. It also harmonizes software and hardware configurations, reducing operational disruptions and maintenance complexity for MROs and compliance teams.
More for Pratt & Whitney PW1500G
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- EASA AD US-2022-27-04Engine Controls - Electronic Engine Control Full Authority Digital Engine Control Software - ReplacementJan 3, 2023
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