AD 85-04-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | ATF3-6 | GARRETT TURBINE ENGINE COMPANY (GTEC) (formerly AiResearch Manufacturing Company of Arizona) Model ATF3-6-2C Engines |
| engine | Honeywell International Inc. | ATF3-6A | GARRETT TURBINE ENGINE COMPANY (GTEC) (formerly AiResearch Manufacturing Company of Arizona) Model ATF3-6-2C Engines |
Unsafe Condition
The possibility of an uncontained engine failure due to seal/rotor contact and/or seal looseness in the stationary seal/sixth stage low pressure turbine rotor assembly area of engines with exhaust deflector liner and seal assembly, Garrett Part Numbers 3001313-10 through -14, and not incorporating the bolted flange system.
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Required Actions
Within 25 operational hours after the effective date, inspect for seal/rotor contact and seal looseness. Subsequent inspections every 75 operational hours. Disassemble and modify/replace components if inspections fail. Incorporate bolted flange system within 500 operational hours or upon rotor assembly removal.
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Compliance Time
Compliance is required as indicated unless already accomplished. The amendment becomes effective June 24, 1985, except for those under telegraphic AD T85-04-51 effective March 1, 1985.
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Affected Aircraft
Garrett Turbine Engine Company (GTEC) Model ATF3-6-2C engines with exhaust deflector liner and seal assembly, Garrett Part Numbers 3001313-10 through -14, and not incorporating the bolted flange system specified in paragraph (d).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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