As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER STARTING THE APU, ACFT CABIN FILLS WITH NOXIOUS FUMES OF AN OILY NATURE. REMOVED CONTAMINATED APU & INSTALLED A REPAIRED APU. OPS & LEAK CHECKED GOOD. WORK DONE IAW MM 49-10-01-900-802, 53-71-01-900-801, 24-33-01-900-801 & AND MM 49-24-14.