AD 74-15-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | American Champion Aircraft Corp. | 8GCBC | Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft |
Unsafe Condition
Improper indexing of the propeller to the crankshaft flange may cause bushing shoulders to be misaligned, leading to potential damage or failure of the propeller mounting components.
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Required Actions
Verify propeller indexing to crankshaft flange by removing upper cowling and examining bushing shoulders. If misaligned, remove propeller and spacer, inspect parts for damage, replace as necessary, and reassemble ensuring proper indexing and torque bolts to 660-780 inch-pounds.
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Compliance Time
Before further flight
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Affected Aircraft
Bellanca Aircraft Corporation Model 8GCBC aircraft, Serial Numbers 2-74 to 62-74.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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