What was found
MIA - FLT 22 - DURING TAXI TO RUNWAY THE MID COMPT SMOKE LIGHT ILLUMINATED ALONG WITH MWP SMOKE LIGHT. DISCHARGED BOTH CARGO FIRE BOTTLES. EMERG EQUIP CALLED OUT. NO EVIDENCE OF SMOKE IN MID CARGO COMPT. SMOKE DETECTOR GROUND OPS CHECKED GOOD. VERIFIED NR 1 AND TWO CARGO COMPT FIRE BOTTLES BLOWN, REPLACED BOTH BOTTLES. UPON TROUBLESHOOTING FOUND THE FWD CARGO AFT SMOKE DTECTOR INOP, PLACARDED FWD CARGO AFT SMOKE DETECTOR INOP IAW WITH THE MEL OCT 1, 1997. REPLACED FWD CARGO AFT SMOKE DETECTOR IAW AMM 26-14-00. OPS CHECK NORMAL, CLEARED DMI, REMOVED PLACARD. A/C RETURNED TO SERVICE. (M)