Airworthiness DirectiveEASA AD US-2023-20-11

[Correction] Engine - High-Pressure Compressor Rear Hub - Replacement

Published: Oct 31, 2023
Effective: Nov 1, 2023
Deadline: Nov 1, 2023

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What to do

Operators and MROs must replace the HPC rear hub with a part eligible for installation at the next engine shop visit after November 1, 2023. Eligible parts include those not listed with affected serial numbers or those serviced per the specified Pratt & Whitney service bulletin. Comments on the AD may be submitted until December 1, 2023.

Summary

Correction to FAA Airworthiness Directive 2023-20-11 concerning International Aero Engines, LLC Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. The correction adds a previously omitted part number for the high-pressure compressor rear hub subject to replacement. The directive addresses safety issues related to potential heat-induced cracking and uncontained separation of the HPC rear hub.

What changed

The correction specifically adds part number 30G8208 to the list of affected high-pressure compressor rear hubs alongside part number 30G4008 in the regulatory text of AD 2023-20-11. No other changes to the original directive were made, and the effective date remains November 1, 2023.

Why it matters

This correction ensures that all affected HPC rear hubs are properly identified, preventing misinterpretation by maintenance, repair, and overhaul (MRO) personnel. Accurate part identification is critical to avoid uncontained engine failures that could lead to in-flight shutdowns and damage to aircraft. Compliance with the corrected AD is essential for maintaining engine safety and airworthiness.

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