Model 310Q; Cracked Main Landing Gear Torque Tube; ATA 3230

Model 310Q; Cracked Main Landing Gear Torque Tube; ATA 3230

Extracted From:    AC No. 43-16A
            ALERT NO. 304
            November 2003

During flight, the pilot noted the aircraft seemed slower and was yawing to the left. A fly-by inspection indicated the left main landing gear was down, while the right main and nose landing gears were retracted. The pilot selected the gear-down position, and all three gears indicated down-and-locked. He landed the aircraft at a maintenance base without incident.

An investigation revealed the left main gear torque tube (P/N 5045010-19) had cracked at the fork-bolt boss, and the crack had progressed around the torque tube in a spiral manner.

A search of the FAA Service Difficulty Reporting Program data base revealed 15 additional failures of the main landing torque tube (P/N 5045010-19) that is used on the Cessna 300 and 400 series aircraft.

Part total time-5,000 hours.

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