What was found
LOWER FWD CARGO SMOKE DETECTION SYS INOPERATIVE. PERFORMED FIM 26-16 FAULT TREE 814. FOUND BLOWER 2 INOP. T/S PER FIM 26-16 FT 814 EICAS MSG CARGO DET AIR. REMOVED AND REPLACED AFT CARGO AIR DETECT PRESSURE SWITCH IAW AMM 26-16-03, OPS CHECK GOOD FOR SWITCH BUT SUSPECT FWD NR 1 BLOWER IS INOPERATIVE. TS PER SRM 26-16-01, VERIFIED FWD 1 BLOWER MOTOR IS SETTING POWER AND MOTOR DOES NOT RUN. REMOVED AND REPLACED AFT SMOKE DETECTOR BLOWER 1 IAW AMM 26-16-02. NO HELP. REMOVED AND REPLACED AFT SMOKE DETECTOR PLENUM PRESSURE SWITCH S4-55 IAW AMM 26-16-03. NO HELP. R & R BLOWER 1 FOR CARGO DET AIR IAW AMM 26-16-02.