What was found
REJECTED TAKEOFF AT 110KIAS DUE TO FIRE WARNING. PERFORMED ENG & APU FIRE DETECT CONTROL MODULE BITE IAW AMM 26-10-00-710-801. NO HELP, PERFORMD A HIGH POWER ENG RUN. CREW STATED THAT ALL SIX FIRE INDICATIONS WENT OFF ON TAXI OUT TRAVELING AT 110KIAS, APU WAS NOT RUNNING BUT FIRE INDICATION AS WELL. STOPPED & SHUT DOWN BOTH ENGS. CREW & FIRE DEPART STATED THAT THERE WAS NO VISUAL IND OF FIRE OR SMOKE SEEN FROM ACFT. INITIAL INSP OF FLT DECK, FOUND VISUAL INDS OF FIRE/OVERHEAT DETECT SYS ILLUMD ON P8-1 FIRE CONTROL PANEL. BOTH CAPT & FO P7, FIRE WARNING SWITCHES ILLUMD & AURAL WARNINGS HEARD. REPLACED FIRE-OVERHEAT MODULE M279 IAW AMM 26-10-01. BITE TEST OK & FIRE PANEL TEST OK. ACCOMP HI PWR ASSURANCE RUN TEST 5 AMM 71-00-00-700-813, NORMAL. CONFIG PACKS ON NO FIRE OR OVERHEAT DURING RUNS.