AD 73-03-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexandria Aircraft, LLC | 17-30A | Airworthiness Directives; Bellanca Model 17-30A Airplanes |
Unsafe Condition
Bolt failures and subsequent washer ingestion into the engine due to AN4H-17A bolts attaching the air induction box to the throttle body.
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Required Actions
Replace AN4H-17A bolts with new ones, ensure proper installation of 4 washers between spacers and air induction box, torque bolts to 35-40 inch-pounds, safety wire them, and modify the air induction box per Bellanca Service Letter 75 or FAA-approved revisions. Alternate methods require approval from the FAA Chief, Engineering and Manufacturing Branch.
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Compliance Time
Within 10 hours time in service after the effective date of this AD for paragraph a, and within 50 hours time in service after the effective date for paragraph b.
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Affected Aircraft
Bellanca Model 17-30A airplanes with serial numbers 30263 through 73-30489.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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