AD 78-01-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McCauley Propeller Systems | D2AF34C | MCCAULEY PROPELLERS Model D2AF34C305 Propellers |
Unsafe Condition
Propeller hub cracks could lead to possible failures.
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Required Actions
Inspect hub extension exterior surface with 10X glass for cracks between spinner bulkhead and engine flange. Reinspect every 50 hours. If propeller is removed, inspect interior/exterior surfaces within first 1.5 inches from engine flange by dye penetrant method. Replace cracked hubs before further flight.
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Compliance Time
Within 500 hours total time in service (for propellers with <490 hours as of 01/16/1978) or within next 10 hours (for those with ≥500 hours or unknown time as of 01/16/1978). Reinspections every 50 hours from last inspection.
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Affected Aircraft
McCauley Propeller Systems Model D2AF34C305 propellers installed on rear engine of Cessna T337G (Serial Numbers P337-0001 through P337-0193) and FT337GP aircraft (Serial Numbers FP33700001 through FP3370013).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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