As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ODOR OF HOT OIL DURING DESCENT. EVALUATED AND FOUND BURNED OIL IN APU BLEED AIR SHROUD. REMOVED APU P/N 3800548-2 S/N P-295 AND INSTALLED REPAIRED UNIT P/N 3800548-2 S/N P-358 (T.T. 3165, CYCLES 3212). RUN UP, LEAK CHECK, AND OPERATIONAL CHECK GOOD. ALL MAINTENANCE PERFORMED IAW MM 49-00-00.