Airworthiness directives › 2019-11-08
AD 2019-11-08 Airworthiness Directives; International Aero Engines Turbofan Engines
Applicability*9
This AD applies to all International Aero Engines, LLC (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1129G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM model turbofan engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Remove the MGB assembly, part number (P/N) 5322505, and install a part eligible for installation as follows: (i) For engines that operate on 180-minute extended operations (ETOPS) flights, within 90 days from the effective date of this AD; (ii) For engines that operate on 120-minute ETOPS flights, within 120 days from the effective date of this AD. (2) For engines with MGB assembly P/N 5322505, within 120 days from the effective date of this AD, remove electronic engine control (EEC) software earlier than FCS 5.0 from the engine and load EEC software that is eligible for installation.
Unsafe condition
This AD was prompted by multiple reports of in-flight engine shutdowns as the result of high-cycle fatigue causing fracture of certain parts of the main gearbox (MGB) assembly. The FAA is issuing this AD to prevent failure of the MGB assembly. The unsafe condition, if not addressed, could result in failure of one or more engines, loss of thrust control, and loss of the airplane.
Affected ADs
None.
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