What was found
AFTER IN-FLIGHT APU START RECEIVED AN ECAM APU FAULT, AFTER PUSHING THE MASTER SWITCH TO SHUT DOWN APU. TROUBLESHOT APU IAW TSM 49-91. FAULTED LUBE PUMP FILTER AND GEN SCAV FILTER. NO METAL DEBRIS FOUND IN SCAV FILTER OR CHIP DETECTOR. NO DPI POPPED. REPLACED SCAV FILTER PER AMM 49-91. RAN APU AND OPS CHECKS NORMAL. NO LEAKS, NO FAULTS. OK FOR SERVICE