AD 2006-06-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | S92 | Airworthiness Directives; General Electric Company Aircraft Engines (GEAE) CT7-8A Turboshaft Engines |
| engine | General Electric | Company Aircraft | Airworthiness Directives; General Electric Company Aircraft Engines (GEAE) CT7-8A Turboshaft Engines |
Unsafe Condition
Failures of the No. 3 bearing in GEAE CT7-8A engines, caused by bearing contamination by Aluminum Oxide or improper use of a bearing support tool, leading to metal loss at the roller ball and race interface.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours time-in-service after the effective date, inspect the electrical chip detector assembly. If the chip detector assembly contains any bearing material, replace the engine. Stagger inspection intervals for both engines on the same helicopter. Perform repetitive inspections within 25 hours time-since-last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service after the effective date, and thereafter within 25 hours time-since-last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company Aircraft Engines (GEAE) CT7-8A turboshaft engines, serial numbers 947201 through 947204, 947209 through 947235, 947238 through 9472268, 947273 through 947281, and 947283 through 947285, installed on, but not limited to, Sikorsky S92 helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.