What was found
L BLEED TRIP OFF LGT CAME ON AT 80KTS. TAKEOFF ABORTED. FOLLOWED FIM 36-10 TASK 809. UNABLE TO PERFORM TS OF PRECOOLER CHK AT LINE. REQUESTING MEL MEL 3603A CANNOT DEFER DUE TO ICING RESTRICTION REF AMM 36-11-00-700-801 ACCOMPLISHED HEALTH CHECK ON HIGH STAGE VALVE STEP I 1-5C. HIGH STAGE VALVE DID NOT OPEN WHEN SUPLYING 75 PSI AND DID NOT CLOSE FULLY. SUSPECTED HSV INOP. HSV NIS IN SFO ADD EMP:U367910 REMOVED AND REPLACED WITH A NEW HIGH STAGE VALVE AND SEAL. REF AMM 36-11-06-400-801PARTS USED: 99-3611-3-0013,QTY :1 29-3611-9-0002,QTY :1 1335101,QTY :1. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1335101 SN OFF 2451 VALVE, HIGH STA OFF 29-3611-9-0002 2451 ON 29-3611-9-0002 3884 PERFORMED LEAK CK.. GOOD.. NO LEAKING FOUND AT THIS TIME.. REF AMM 36-11-00-400-801 STEP G2B. PERFORMED RUN UP OPS TEST. OPS CK BLEED AIR CROSSOVER TEST GOOD. REF AMM 36-11-00-710-801. NO LIGHT CAME ON AT TAKE OFF POWER..