Stuck, Jammed, Split

The aircraft lost power and landed in a field, coming to rest on its nose. During the post-crash investigation, the pilot stated he checked the fuel gauge prior to the flight and that it read one-half full. He did not visually check the quantity. Investigation revealed the fuel tank to be empty and the gauge stuck in the half-full position. The fuel gauge part number provided is 2-731.During a check ride, the chief pilot shut down the right engine in flight. When attempting a restart, the fuel shut-off lever jammed in the off position. The crew conducted a successful and uneventful single engine landing at the base airport. Upon investigation, a technician discovered the aft shroud on the r/h starter generator (p/n 23079-000-1) had slipped aft, blocking the linkage while the shutoff control remained in the off position. The shroud was repositioned and its clamp secured.

Key Takeaways:

• Aircraft systems can experience critical failures due to unreliable instruments (e.g., stuck fuel gauges) or component wear/damage (e.g., stripped trim jackscrews), highlighting the necessity for robust pre-flight checks and redundant verification.
• Maintenance precision is vital, as even minor component misalignments (e.g., a slipped shroud jamming a fuel linkage) or unexpected component failures (e.g., sheared flap drive lugs) can severely impact flight control or engine operation.
• Structural integrity of key aircraft components, such as engine mount brackets, is paramount; failures can arise from design flaws or material fatigue, underscoring the importance of thorough inspections.

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