As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AT ELP BOTH AFT LAV SMOKE DETECTORS WENT OFF. FLIGHT ATTENDANT REPORTED UNIDENTIFIABLE SMELL. OPENED LAV DOORS AND ALARM SILENCED AFTER 1 TO 2 MINUTES. FOUND APU CHIP DETECTOR O-RING LEAKING. REPLACED SAME AND PERFORMED DUCT BURNOUT.