AD 2003-06-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Aircraft | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
Unsafe Condition
Separation of the propeller gearbox (PGB) left-hand and right-hand idler gears, which could result in uncontained PGB failure and internal bulkhead damage, possibly prohibiting the auxiliary feathering system from fully feathering the propeller.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the PGB oil filter impending bypass button (IBB) for extension (popping). Perform follow-on inspections, maintenance, and replacement actions if the IBB is popped. Replace the PGB with a serviceable unit if necessary. Replace certain left-hand and right-hand idler gears at PGB overhaul. Replace specific serial number (SN) PGBs before accumulating 2,000 flight hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified timeframes for inspections and replacements as outlined in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Aircraft Engines (GEAE) CT7 series turboprop engines, with specific focus on PGBs and idler gears.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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