As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATTEMPTED TO START THE APU NO LIGHT OFF THEN THE "FAULT" LIGHT ILLUMINATED. AFTER APPROX 5 MINUTES THE FAULT LIGHT WENT OUT. PERF APU BITE CHECK FOUND FAULT CODE 49 41011 NO FLAME SHUTDOWN LOGGED ACCOMP FAULT ISOLATION PROCDEURES NO FAULTS. AS PRECAUTIONARY REMOVED AND REPLACED APU IGNITOR UNIT PER M/M 49 41 31 AND ALSO REMOVED AND REPLACED APU IGNITOR LEAD AND PLUG PER M/M 49 41 52 AND 49 41 51 OPS CHECKS NORMAL.