As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, STRONG BURNING ODOR FOLLOWED BY APU FAULT CAUTION AND APU AUTO-SHUTDOWN. COMPLIED QRH, PACKS SWITCHED TO 10TH STAGE BLEEDS AND ODOR DISSIPATED. TROUBLESHOT BURNING ODOR TO APU. APU OIL SERVICING CAP FOUND TO BE FAULTY. (M)