AD 77-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 278 | BEECH Model 278 Propellers |
Unsafe Condition
Cracks in the exposed thread runout area between the hex flats and the aft pitch setting nut of Beech P/N 278-336 pitch control bolts could lead to loss of propeller control.
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Required Actions
Inspect pitch control bolts using dye penetrant procedures within 100 hours' time in service after the last AD 69-26-04 inspection. Install Beech Kit No. 278-0002S with specified pitch control bolts and steel yoke within 100 hours' time in service after the AD's effective date. Equivalent methods require FAA approval.
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Compliance Time
Within 100 hours' time in service after the last inspection accomplished per AD 69-26-04 and within 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Beech Model 278 propellers installed on Models H35, J35, K35, M35, N35, P35, A45 (T34A), B45, and D45 (T34B) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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