As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN THE PROCESS OF TROUBLESHOOTING, APU STARTING FAULT. THE PAWLS OF THE STARTER ADAPTER WERE FOUND TO BE WORN. PARTS WERE ORDERED IDENTIFIED BY P/N FORM DC-10 IPC 49-44-01 ITEM 80. WHEN THE PARTS WERE RECEIVED THERE WAS ONLY AND ADAPTER WITHOUT THE PAWL. WHEN THE MANUFACTURER ALLIED-SIGNAL IPC WAS CHECKED THERE WAS A DIFFERENT P/N AND WHEN ORDERED IT CONTAINED THE COMPLETE ASSY. (M)