As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT ON START ILLUMINATED AFTER 5 MIN, FAULT LITE EXTINGUISHED. UPON RESTART APU LOW OIL PRESSURE ILLUMINATED. GROUNDED - YES. VERIFIED DISCREPANCY. ACCOMPLISHED FIM 49-40 TASK 805. FOUND IGNITION UNIT INOP. REMOVED AND REPLACED IGNITION UNIT REF AMM 49-41-31. OPS TEST GOOD REF AMM 49-11-00. ACCOMPLISHED APU BITE FIM 49-60 TASK 801. NO FAULTS FOUND. PERFORMED APU GROUND RUN REF AMM 49-11-00/501. SYS CHKS NML. CLEARS MEL 49-1B.