AD 79-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | American Champion Aircraft Corp. | 7ECA | Airworthiness Directives; Bellanca Model 7ECA, 8KCAB and 8GCBC Aircraft |
| aircraft | American Champion Aircraft Corp. | 8GCBC | Airworthiness Directives; Bellanca Model 7ECA, 8KCAB and 8GCBC Aircraft |
| aircraft | American Champion Aircraft Corp. | 8KCAB | Airworthiness Directives; Bellanca Model 7ECA, 8KCAB and 8GCBC Aircraft |
Unsafe Condition
Exhaust system cracking in the welded area between the riser tube and exhaust flange, and muffler body cracks, which could lead to exhaust leakage and potential engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect exhaust system components for cracks, fractures, or leakage; repair or replace damaged parts. Check alignment of riser flanges and exhaust port studs, ensuring free movement and equal spacing. Torque exhaust port stud nuts evenly and tighten bead clamp bolts to allow rotation with hand pressure. Ensure proper clearance between exhaust system and aircraft components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 30 days or 10 hours of aircraft time in service, whichever occurs first, after the effective date of this AD
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Affected Aircraft
Bellanca Model 7ECA (S/N 985-74 thru 1319-79), 8KCAB (S/N 120-74 thru 550-79 with Lycoming AEIO-360 series engine), and 8GCBC (S/N 1-74 thru 323-79)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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