[Correction] Engine - Interstage High-Pressure Turbine Rotor Seal - Inspections
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of GE Model GE90-110B1 and GE90-115B engines must continue to perform ultrasonic inspections of the interstage HPT rotor seal as specified in GE Service Bulletin 72-0908 R00, dated July 7, 2023. Inspections must begin before reaching specified part cycles or within 10 flight cycles after May 14, 2024, and be repeated at intervals defined in the service bulletin. Any non-serviceable seals found must be removed from service before further flight, and seals must be replaced at the next engine shop visit.
Summary
Correction to Airworthiness Directive 2024-06-15 issued by the Federal Aviation Administration (FAA) concerning General Electric Company Model GE90-110B1 and GE90-115B engines. The correction addresses typographical errors in the references to service information related to inspections of the interstage high-pressure turbine (HPT) rotor seal. The directive mandates ultrasonic inspections and eventual replacement of the affected rotor seals to prevent engine failure.
What changed
This correction fixes typographical errors in the service bulletin references within the original AD 2024-06-15 regulatory text. Specifically, the service bulletin number was corrected from '72-A0908' to '72-0908' in multiple paragraphs. No other changes to the original AD's requirements or compliance dates were made.
Why it matters
Accurate references to service information are critical for operators and maintenance personnel to correctly perform required inspections and maintenance. This correction ensures that aviation professionals use the correct service bulletin, preventing confusion and potential non-compliance. Proper adherence to the AD helps avoid uncontained high-pressure turbine failures, which pose significant safety risks.
More for General Electric GE90
All 19- EASA AD US-2025-25-07Turbine Engine - High-Pressure Turbine (HPT) Stage 1 and HPT Stage 2 Disks - ReplacementJan 9, 2026
- EASA AD US-2025-07-10Engine Controls - Engine Indicating and Crew Alerting System - Dispatch Prohibition; Full Authority Digital Engine Control (FADEC) Integrated Circuit Microprocessor - Replacement; Electronic Engine Control FADEC - Software UpgradeMay 15, 2025
- EASA AD US-2023-26-07Engine - High-Pressure Turbine Stage 1 and 2 Disks, Forward Rotor and Interstage Seals and Stages 7—9 Compressor Rotor Spools - ReplacementFeb 22, 2024
- EASA AD US-2023-05-17
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