As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING & APU START, APU FAULT LIGHT ILLUMINATED. APU IGNITION EXCITER UNIT REPLACED, IGNITION LEAD REPLACED & IGNITER PLUG REPLACED. SYS RETURNED TO NORMAL OPERATIONAL STATE. FUNCTION TEST OF APU CARRIED OUT SUCCESSFULLY. FIVE ATTEMPTED STARTS TRIED BEFORE REPLACEMENT OF ABOVE PARTS. TWO GOOD STARTS ACHIEVED AFTER REPLACEMENTS. NO VERIFICATION FLIGHT REQUIRED. ACFT GOOD FOR SERVICE.