Airworthiness directives › 2020-05-28
AD 2020-05-28 Airworthiness Directives; International Aero Engines LLC 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, before further flight after the effective date of this AD. (ii) For engines that operate on 120-minute ETOPS flights, within 120 days from June 28, 2019 (the effective date of AD 2019-11-08), or before further flight after the effective date of this AD, whichever occurs later. (iii) For engines that do not operate on ETOPS flights, at the next engine shop visit after the effective date of this AD. (2) For engines with MGB assembly P/N 5322505, within 120 days from June 28, 2019 (the effective date of AD 2019-11-08), or before further flight after the effective date of this AD, whichever occurs later, remove electronic engine control (EEC) software earlier than FCS5.0 from the engine and install 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
This AD replaces AD 2019-11-08, Amendment 39-19654 (84 FR 27511, June 13, 2019).
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