AD 2004-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Aircraft | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
Unsafe Condition
Propeller gearbox (PGB) equipped with certain gears that do not meet design specifications, leading to separation of left-hand and right-hand idler gears, which could result in uncontained PGB failure and internal bulkhead damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the propeller gearbox (PGB) oil filter impending bypass button (IBB) and oil filter. Replace left-hand and right-hand idler gears at time of PGB overhaul. Replace certain serial number (SN) PGBs before accumulating 2,000 flight hours. Add additional SNs of affected PGBs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance time specified in the existing AD, as this AD supersedes it.
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 serial numbers and certain gears that do not meet design specifications.
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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