AD 2004-16-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | General | Electric Company (GE); CT7-2D1 Turboshaft | Airworthiness Directives; General Electric Company (GE); CT7-2D1 Turboshaft Engines. |
Unsafe Condition
Uncontained failure of turbine stage 2 aft cooling plates, part number 6064T07P02, with specified serial numbers, due to microcracks caused by electro-discharge machining of cooling airholes.
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Required Actions
Replace turbine stage 2 aft cooling plates, P/N 6064T07P02, with specified serial numbers, at the next disassembly of the gas generator turbine rotor assembly at an FAA-approved overhaul facility, but not later than 5,000 cycles-since-new. Do not install affected cooling plates after the effective date.
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Compliance Time
Within 5,000 cycles-since-new or at the next disassembly of the gas generator turbine rotor assembly, whichever occurs first.
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Affected Aircraft
General Electric Company CT7-2D1 turboshaft engines with turbine stage 2 aft cooling plates, P/N 6064T07P02, and specified serial numbers. These engines are installed on, but not limited to, Sikorsky S-70 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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