Airworthiness DirectiveEASA AD US-2019-25-01

NOT ADOPTED - EASA DECISION ATTACHED

Published: Dec 16, 2019
Effective: Dec 16, 2019
Deadline: Dec 16, 2019

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must remove and replace LPT 3rd-stage blades with part numbers 5387343, 5387493, 5387473, or 5387503 within the specified compliance times. For certain serial-numbered engines operated by specific airlines, replacement must occur on an accelerated schedule before the next engine shop visit. Operators should consult Pratt & Whitney Service Bulletin PW1000G-C-72-00-0111-00A-930A-D, Issue No. 002, dated October 18, 2019, for detailed replacement procedures and submit any comments on the AD by January 13, 2020.

Summary

The document titled 'NOT ADOPTED - EASA DECISION ATTACHED' is a Federal Aviation Administration (FAA) Airworthiness Directive (AD 2019-25-01) addressing certain International Aero Engines, LLC (IAE LLC) turbofan engines including models PW1122G-JM, PW1124G-JM, PW1124G1-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM. This AD mandates the replacement of specific low-pressure turbine (LPT) 3rd-stage blades due to multiple reported failures that reduce engine thrust and pose safety risks. The directive aims to mitigate the unsafe condition caused by impact damage to these blades.

What changed

This new FAA Airworthiness Directive requires the removal and replacement of affected LPT 3rd-stage blades with parts made from more impact-resistant materials. It introduces an accelerated replacement schedule for certain serial-numbered engines operated by specific airlines, while other affected engines must comply at the next engine shop visit. This AD is issued as a final rule with a request for comments, bypassing the usual prior notice and comment period due to the urgency of the unsafe condition.

Why it matters

This AD is critical for aviation professionals because it addresses a safety risk that could lead to engine failure, loss of thrust control, and potentially loss of the aircraft. Operators and maintenance organizations must ensure timely compliance to avoid in-service engine failures. The directive impacts maintenance planning and parts inventory management due to the required blade replacements and accelerated compliance for certain operators.

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