What was found
ETOPS SIGNIFICANT SYS - UNABLE TO START APU AT 37,000 FT. 3 ATTEMPTS, 3 FAULT SHUTDOWNS. APU RPM HUNG AT 26 PERCENT AND EGT 800 DEG. OAT SAT -46 DEG C TAT -17 DEG C. UPON ACFT ARRIVAL AT GATE FOUND APU RUNNING. ON CREW DEBREIF, CREW FOLLOWED FCOM & SUCCESSFULLY STARTED THE APU AT FL 340, SAT -40 DEG, TAT -10 DEG. APU TOOK 1 MIN 50 SEC. TO START. T/S IAW FIM 49-BITE IND ECU MSG: LEG 4 EGT OVERTEMP, NO DATA; LEG 3 START ABORT,NO DATA; LEG 2 START ABORT, NO DATA. LAST RUN, NO DATA. APU RAN NORMAL, ACCOMP. APU HEALTH CK J/C M7-49-04 NO PR'S NOTED. APU START PROC FOLLOW IAW FIM WITH NO FAULTS NOTED. INSP APU, NO PR'S FOUND. OK FOR SERVICE.