Aviat: A-1; Uncoupled Elevator Pushrod; ATA 2730
The submitting mechanic stated, “...a pilot reported total loss of elevator control on final approach to Blairstown airport. The boot around the rear control stick was removed—(we) found the elevator push rod was no longer connected. The aft belly ban was removed and a loose bolt and washer were found. The nut was not found. The other rod ends were (also) inspected for safety; the self-locking nut and bolt for the aft interconnect push rod was very loose. This existing hardware was not reinstalled because it was (found) loose (during) this inspection. (New hardware was installed for each noted discrepancy, replacing the old with) AN bolts, washers, nuts, and cotter pins in the rear control stick rod-end connection points. After inspection and repair of the flight controls the aircraft was deemed airworthy. The owner was advised to have a factory Aviat service center inspect the aircraft and make repairs according to the maintenance manual and parts book.  “The probable cause for the loose hardware could be from the reuse of the hardware or incorrect torque applied to the nuts and bolts. (A castle nut and cotter pin were installed in place of self-locking nuts...a proven method of safety for flight controls.)” (No part numbers accompanied this discrepancy.) MORE