What was found
DURING INFLIGHT START FOR CSS WE RECEIVED A FAULT LIGHT AND THE APU SHUT DOWN TWICE AT FL380, APU STARTED SUCCESSFULLY AT FL350. GROUNDED - YES. ACCOMPLISHED BITE OF APU FOUND FAULTS IN FAULT HISTORY NO ACCELERATION SHUTDOWN MESSAGE 49-41010. OVERTEMP SHUTDOWN MESSAGE 49-31016. REMOVED AND REPLACED APU FUEL CONTROL UNIT REF AMM TASK 49-31-11. OPS CHECK GOOD NO LEAKS NOTED. REMOVED AND REPLACED APU LUBE MODULE REF AMM TASK 49-91-11. OPS CHECK GOOD NO LEAKS NOTED.