What was found
UNIT WAS INSTALLED 12/7/94 AT AIRCRAFT TT 14,017.3 HRS. IT WAS REMOVED 5/23/95 AT AIRCRAFT TT 14,244.3 HRS WITH 227.0 HRS TIME IN SERVICE SINCE ZERO-TIME OVERHAUL. (PUMP TBO 2,000 HRS.) UNIT REMOVAL CAUSED BOOST PUMP CIRCUIT BREAKER TO TRIP AND WOULD NOT RESET. UNIT WAS OVERHAULED 9-9-94 BY A REPAIR STATION. SUBMITTER SUGGESTS RELIABILITY OF THESE OVERHAULED PUMPS HAS BEEN POOR AND LOW-TIME FAILURE SUCH AS THIS ARE QUITE COMMON IN OUR FLEET OF 17 AIRCRAFT.