What was found
ETOPS SIGNIFICANT SYSTEM - APU AUTO SHUTDOWN ON GROUND.// PERFORMED APU BITE CHECK. FAULT CODE 499141 & 499114. PERFORMED TSM TASK 49-00-81-810-849-A. MINUTE PARTICLES FOUND IN GEN SCAV FILTER. REMOVED AND REPLACED APU GEN PER AMM 24-23-51. CONDITION SAME. PERFORMED TSM TASK 49-90-00-810-812-A. DURING APU OPERATION FOUND LUBE PUMP DP SWITCH CLOSED (FAULTY). NO DEBRIS FOUND IN FILTER. REMOVED AND REPLACED LUBE PUMP DP SWITCH PER AMM 49-9-14. OPS CHECK GOOD OK FOR SERVICE.