What was found
DURING TAXI GOT MULTIPLE AVIONICS SMOKE WARNINGS WITH NO SMOKE SMELL . THE WARNING WOULD COME AND GO. DURING TAXI, RECEIVED MULTIPLE AVIONICS SMOKE WARNINGS, WITH NO SMOKE ODOR. THE WARNING WOULD COME & GO WORKED WITH MTSI 53-21/9289. WHILE ACCOMPLISHING MAIN CARGO DRAINAGE WORK CARD, FOUND ALL FUNNEL DRAINS & FUSELAGE VALVE BODY DIRTY & CLOGGED, CLEANED AND FLUSHED OUT DIRT AND WATER. REMOVED AND REPLACED 4 VALVE BODIES AND CLEANED 2 IAW AMM 51-80-21-06, FOUND EQUIP RACK 80VU PAN WITH WATER, CLEARED THE LINE AND DRAINED, ALSO FOUND AVIONICS COMP SMOKE DETECTOR FILLED WITH WATER, R & R THE SAME IAW AMM 26-15-12-04. OPERATIONAL TEST IS GOOD IAW AMM 26-15-00. ACFT OK FOR SERVICE.