Cessna: 185E; Stripped Pitch-Trim Jack Screws; ATA 2742
An FAA field inspector stated, "Maintenance personnel were advised by the pilot the horizontal stabilizer trim quit working. Inspection found the barrel side of the trim screw jack had stripped out (P/N 0712500-13). This system includes two trim screw jacks: (the remaining jack) took all of the load and jammed up. Inspection of the second trim screw-jack barrel found the upper one-third of the threads were stripped in the trim screw barrel. Cessna does not specify any inspection criteria for wear of the jack screw threads or the barrel threads. (I) Recommend either mandatory inspection criteria for the barrels and threads, or an Airworthiness Directive to preclude loss of (aircraft) control....” (The FAA Service Difficulty Reporting System database revealed four entries for this part number since 1995) Part Total Time: 8,672 hours.
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