Broken And Cracked

Before a touch-and-go landing, the pilot noticed did not receive a gear-down light for the left main gear. A safe landing was made, with minor damage and no injuries. Upon examination, one of the left main landing gear actuator hydraulic fittings (p/n: MS20822) was found broken flush with the actuator housing. Examination of the gear well and the general layout of components show the flex hose may have been stress loaded while the gear was retracted.

Key Takeaways:

• Aircraft incidents arose from various component failures, including a broken hydraulic actuator fitting, a failed lift strut eyebolt, and a fractured camshaft.
• Causes ranged from improper installation (eyebolt) and suspected operational stress (hydraulic fitting, starter run-on) to potential manufacturing defects (camshaft fracture originating at a stamped part number).
• Recurring failures were noted for both newly overhauled starter adapters and Dukes fuel pumps, suggesting potential systemic issues with these components or their operation.

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