As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU WOULD NOT START 2 ATTEMPTS MADE. CONTROL C/B PULLED RAMP REPORTED SMOKE FROM APU COMPARTMENT. SMOKE STOPPED IN FIVE MINUTES. TORQUED RELAY TERMINALS. REPLACED APU STARTER AND CLAMP. INSPECTED TAIL PIPE AND STARTER HARNESS FOUND OK. BITE ECU, FAULTS APU DOOR, CLEARED MSG, APU STARTED 3X. REMOVED MCO/PLAC.