AD 70-16-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TPE331-3W | AIRESEARCH Model TPE331-3W-301A Engines |
Unsafe Condition
Backing off of the high speed pinion retaining nut may cause engine failures.
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Required Actions
Replace the high speed pinion assembly P/N 869441-2 in accordance with AiResearch telegraphic service bulletin No. 622 dated July 24, 1970, or later FAA approved revision prior to further use.
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Compliance Time
prior to further use
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Affected Aircraft
AIRESEARCH Model TPE331-3W-301A engines, serial numbers P01001 through P-01010 and P-01012, P-01014, and P-01015, installed in but not limited to Handley-Page Model C10A aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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