AD 78-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McCauley Propeller Systems | 3FF32C501 | MCCAULEY PROPELLERS Model 3FF32C501 Propellers |
Unsafe Condition
Blade actuating pin screws (P/N A-1635-104) may fail, leading to possible blade pitch control failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace blade actuating pin screws P/N A-1635-104 with new screws P/N A-1635-108 per McCauley Service Bulletin No. 131 and Service Manual No. 751201. The replacement must be done by an FAA Certificated Propeller Repair Station.
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Compliance Time
before further flight
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Affected Aircraft
McCauley Propeller Systems Model 3FF32C501 propellers with specified serial numbers listed in the AD, installed on but not limited to Cessna Model 421C and 404 aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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