What was found
(CAN) SMOKE WARNING INDICATION FROM MAIN CARGO DECK AREA. AIR TURN BACK. ISOLATED DEFECTIVE SMOKE DETECTOR. AIRCRAFT RETURNED TO SERVICE PER MEL. DEFECTIVE DETECTOR TO BE REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) SMOKE WARNING INDICATION FROM MAIN CARGO DECK AREA. AIR TURN BACK. ISOLATED DEFECTIVE SMOKE DETECTOR. AIRCRAFT RETURNED TO SERVICE PER MEL. DEFECTIVE DETECTOR TO BE REPLACED.