What was found
RTO/ANC - FLT FX076 - AT APPROX V1, MAIN DECK FIRE WARNING TRIGGERED BOTH AURAL AND VISUAL WARNINGS. REJECTED TAKEOFF, MAINT AT ANC INSPECTED ACFT FOR DAMAGE PER CHAPTER 5 HIGH ENERGY STOP. NO DAMAGE FOUND. NO FAULT MESSAGES ON CMC. REQUESTED BOEING TO SEND AOG TEAM TO ANC TO ASSIST IN FAULT ISOLATION AND CORRECTION OF THIS DISCREPANCY. AIRCRAFT CURRENTLY UNDER MAINTENANCE AT ANC WITH ASSISTANCE FROM BOEING TEAM AND ATLAS AIR QUALITY CONTROL INSPECTION. WILL ADVISE FINDING WHEN THEY BECOME AVAILABLE. WITH BOEING TECHNICAL EXPERTISE, THE MAIN DECK SMOKE DETECTOR SYS WAS THOROUGHLY CLEANED. ALL AFOLTS (8) CARDS AND 3 DIODE CARDS WERE REPLACED. ACFT TEST FLOWN AND SYS OPERATION NORMAL. (X)