As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, APU DID NOT STSRT (3 TRIES) (<P>UPON INVESTIGATION NOTED CIRCUIT BREAKER #CB1 ON RH GEN CONTROL UNIT. RESET BREAKER & CIRCUIT BREAKER DID NOT POP AGAIN. PERFORMED APU ECU BITE & OPS CHECK AS REQUIRED PER FIM 49-11 FAULT TREE 805. NO FAULTS NOTED AT THIS TIME. OPS CHECK GOOD </P>)