Bellanca 8KCAB Failed Seat Hinge (American Champion Aircraft Corporation provided the following defect report to the FAA.) The rear seat (p/n 7-1500; revision B) failed at the left hinge point. The AN3 series bolt pulled through the hinge lugs, which are welded to the seat frame bottom. The right hinge holes show elongation, but remained intact. This aircraft was doing spin training at the time of the incident. Modifying the seat frame to current standards is recommended. Part Total Time: 1290.0 hours. Cessna 172S Cracked Propeller Bulkhead Repeated cracks have been found on the propeller bulkhead at the edge of the washer footprint. A material or hardware change may help resolve this problem. 288
Chronic Door Separation?
The rear seat (p/n 7-1500; revision B) failed at the left hinge point. The AN3 series bolt pulled through the hinge lugs, which are welded to the seat frame bottom. The right hinge holes show elongation, but remained intact. This aircraft was doing spin training at the time of the incident. Modifying the seat frame to current standards is recommended.
Key Takeaways:
- Multiple aircraft models (Bellanca 8KCAB, Cessna 172S, Cessna T310Q, Diamond DA40, Piper PA23) reported diverse structural and mechanical failures impacting safety and operations.
- Reported defects include a failed rear seat hinge, recurring cracks on propeller bulkheads, a failed nose gear retraction rod-end leading to gear collapse, and severe main wheel corrosion.
- Several issues, particularly the Cessna 172S propeller bulkhead cracks and Diamond DA40 aft passenger door separations, are noted as recurring problems with multiple similar reports, indicating potential design or material weaknesses.
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