As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CIRCLIP AT END OF PUMP, (SOME PARTS FOUND IN PUMP P/S CAVITY) WAS FOUND MISSING, AND ALLOWED THE DRIVE SHAFT TO DISENGAGE FROM PUMP AND MOVE INTO THE TRANSMISSION DRIVE QUILL. THE PUMP WAS REMOVED AND SENT FOR TEST AND INSPECTION WHICH CONFIRMED SUSPICION.REPORT OF PUMP TEST AND PILOTS INCIDENT REPORT ATTACHED. CIRCLIP AND EXTERNAL P/S REPLACED AS PER BHT TB-205-86-70.