As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE ANTI-ICE ON SMELLED FUMES AFTER PLACING WING ANTI-ICE ON. SMOKE ALARMS IN REAR SOUNDED ON APPROACH WITH POWER AT IDLE. FUMES SMELLED DURING CLIMB, CRUISE, DESCENT WITH ALL AND CROSSED FEEDS OPEN. APU OFF TEMP CONTROL AT 12 O''''CLOCK, LT LAV SMOKE DECT SOUNDED SHORTLY AFTER WING ANTI-ICE PLACED TO TAIL OPERATION. FOUND APU WET WITH OIL. REPLACED APU, ALSO PERFORMED DUCT BURNOUT OPN 5088.