As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 8000 AFTER TAKEOFF FROM EGSS GOT SMOKE/FUME ALERT FROM MAIN DECK SMOKE DETECTOR MID 2A. STAYED ON FOR ABOUT 8 MINS, WENT OFF JUST BEFORE LANDING. REACTIVATED ALL MDC LOOPS ALREADY DEFERRED (AFT A, MID 1B AND MID 2B). NO MORE FAULT DISPLAYED ON MDC SMOKE DETECTION PANEL. CARRIED OUT MDC SMOKE. R & R SMOKE DETECTOR 10 WU AS PER AMM, 26-19-12 P401. PERFORMED TEST AS PER PREVIOUS AMM REF, TEST PASSED.