As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE DETECTOR ACTIVATED IN LAV F/O SIDE ON T/O TO 8000 FT, THEN WHEN OUT, NO ENG / WING ICE ON CROSS FEEDS CLOSED. FOUND APU OIL CAP SEAL BROKEN. REPLACED APU OIL CAP. REMOVED APU INLET PANEL AND CLEANED. PERFORMED STEPS 1-7 OF DUCT BURN OUT. COMPLIED WITH DUCT BURN OUT OP 5088.