Engine - High-Pressure Compressor Front Hub - Replacement
- 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 HPC front hub, P/N 30G2401, within 120 days after December 12, 2018, or according to specified cycles since new or ship date limits depending on engine model. For certain engine models, removal must occur before 6,180 cycles since new or five years from the ship date, and for others before 4,440 cycles since new or four years from the ship date. Operators using mixed engine models must calculate cycles using an approved FAA method and comply within four years from the ship date.
Summary
The FAA Airworthiness Directive 2018-22-02 is a final rule addressing International Aero Engines (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM turbofan engines equipped with a specific high-pressure compressor (HPC) front hub, part number 30G2401. This directive mandates the replacement of the HPC front hub due to corrosion issues that pose a risk of uncontained failure. The AD aims to ensure continued airworthiness and safety of affected engines.
What changed
This new airworthiness directive introduces a mandatory replacement requirement for the HPC front hub, part number 30G2401, on the specified IAE turbofan engines. It establishes compliance timelines based on cycles since new or ship date, depending on engine model, to mitigate the risk of corrosion-induced failure. The AD also clarifies the cycles since new limits and provides guidance for mixed model cycle calculations.
Why it matters
This AD is critical for aviation professionals because corrosion on the HPC front hub can lead to uncontained engine failures, risking damage to the engine and aircraft. Operators and maintenance organizations must comply to maintain safety and regulatory compliance, preventing potential in-flight engine damage. Understanding the specific compliance requirements helps ensure timely and effective maintenance actions.
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New ADs and bulletins for International Aero Engines PW1100 and Aero Engines PW1400, summarized like this page, every Monday.