As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNIT WOULD NOT PRODUCE PRESSURE TO TURN OFF PUMP. REMOVED AND SENT FOR OVERHAUL. INSTALLED SAME BACK IN AFTER OVERHAUL. REMOVED UNIT AND SENT FOR EXCHANGE. THIS OVERHAUL UNIT INSTALLED AND WORKED NORMALLY. AIRCRAFT RETURNED TO SERVICE.