As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNIT WAS INSTALLED ON AIRCRAFT FOR ONLY 51 HOURS BEFORE FAILURE. (PREVIOUS TEAR-DOWN REPORT READ - 'CAUSE FOR REMOVAL UNCONFIRMED'. CAUSE WAS LISTED AS 'APU PUMP FAIL LIGHT' ON. BENCH CHECKED. OK). THIS FAILURE WAS THE SAME. APU PUMP 'FAIL' LIGHT ON. INSTALLED REPLACEMENT UNIT. NORMAL OPERATION.