Accident Sequence
Upon departure, the pilot initiated a landing gear retraction, but the gear did not retract and the landing gear warning horn activated. Deciding to continue, the pilot flew to the original destination. When weather at that airport prevented a landing, he turned back to the departure airport. On landing rollout, the aircraft veered to the left accompanied by a squealing sound from the left main landing gear tire. Subsequently, the aircraft exited the runway surface laterally and the left main gear assembly collapsed and detached from the aircraft.
Investigation Findings
After the accident, an examination of the aircraft was conducted. It was determined that the washer that retains the bolt in the left main gear scissors had failed. Consequently, the scissors separated, allowing the left main gear to rotate. This rotation prevented the ground switch located on the scissors from opening during takeoff, which in turn inhibited the landing gear retraction mechanism.
Relevant Service Information
The failed washer was specifically referenced in Cessna Aircraft Company Service Information Letter ME83-37, issued November 23, 1983. That letter recommended replacing the original washer with a thicker unit at the next scheduled 100-hour inspection.