What was found
CREW REPORTS THE OFCR CREW REST SMOKE DETECTOR WENT OFF AFTER ENG START AND ALSO ATTENDANTS REPORT ODOR IN VICINITY OF DOOR 2. PERFORMED FIM DMC-B787-A-21-20-F5-72A-421A-A. NO HAZE OR ODOR PRESENT AT GATE, RAN BOTH PACKS INDVIDUALLY AND TOGETHER, WITH BOTH RECIRCULATION FANS AND WITHOUT. UNABLE TO REPLICATE ODOR OR SMOKE DETECTOR ALERT. ALERT OCCURED AFTER DUAL ENGINE START AND SUSPECT FUEL/ODOR WAS INGESTED BY AIR CONDITIONING SYSTEM FROM EXTERNAL SOURCE. CREW TO REPORT FURTHER IF REQUIRED. UNABLE TO REPLICATE AT THIS TIME.