What was found
WHILE STILL AT GATE, PRIOR TO PUSH, FSS DISCHARGE LIGHT ILLUMD. SMELLED ODOR OF SUPPRESSION FOAM. NO ACTUAL FIRE IND. FSS POSITIONS 1L,R,C ARE MEL D ON ACFT. OPENED WINDOWS & DOORS. STAIRS WERE BROUGHT BACK. MX NOTED FOAM DISCHARGED. RELEASED FOR SERVICE PER MEL : 26-25-02 AMM: 26-23-40-0 CLEANED FIRE SUPPRESSION FOAM IAW AMM 26-23-40-0. FOR TROUBLESHOOTING PURPOSES NOTED THAT POSITION 1C WAS READING ABOUT 250 DEGREES WHEN ARM DEPLOYED WITH NO CAN IN THAT POSITION. R & R SCREEN TRAP. ALSO R & R CARGO FOAM TANK MAINIFOLD ASSEMBLY. PURGED POSITION 1R PENETRATOR MODULE. SERVICED FOAM & ARGON. REINSTALLED PENETRATOR TIP. LEAK AND RTS GOOD.