Superseded by FAA AD 2020-05-28
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must remove and replace the MGB assembly and update the EEC software to the approved versions. For engines operating on 180-minute ETOPS flights, the MGB assembly replacement must occur within 90 days of the AD's effective date, and for 120-minute ETOPS flights, within 120 days. Operators should consult the specified Pratt & Whitney service bulletins for detailed replacement procedures and submit any comments to the FAA by July 29, 2019.
Summary
FAA Airworthiness Directive 2019-11-08 is a final rule addressing all International Aero Engines, LLC PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1129G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM model turbofan engines. It mandates the removal and replacement of the main gearbox (MGB) assembly and electronic engine control (EEC) software due to high-cycle fatigue fractures causing in-flight engine shutdowns. This directive aims to prevent engine failure, loss of thrust control, and potential loss of the airplane.
What changed
This new airworthiness directive requires operators to remove the affected MGB assembly part number 5322505 and install a redesigned assembly with improved durability features. It also mandates updating the EEC software to a version that restricts engine operation parameters to enhance safety. These actions are interim measures pending potential future rulemaking for engines not operating on extended operations (ETOPS) flights.
Why it matters
This AD is critical for aviation professionals because it addresses a safety risk that has already resulted in multiple in-flight engine shutdowns. Operators and maintenance organizations must comply to avoid engine failures that could lead to loss of thrust and compromise flight safety. Compliance ensures continued airworthiness and regulatory adherence for affected engine models.
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New ADs and bulletins for International Aero Engines PW1100 and Aero Engines PW1400, summarized like this page, every Monday.