What was found
LEFT MANIFOLD AIR TEMP DID NOT EXCEED 170C N1 WERE AT 88 PERCENT, ENGINE ANTI-ICE ON, AIRFOIL DEICE ON, TAIL DEICE SYSTEM ON, THIS IS THE 3RD WRITTEN UP SEE PAGES 7686-24 AND 7686-23 MIN NEED IS 190C NOTE LEFT PACK ON 80 PERCENT. REMOVED AND REPLACED NR 1 ENG PRECOOLER CONTROL VALVE IAW DC8 MM 36-12-59 AND REMOVED AND REPLACED NR 1 ENG PNEU BLEED REG VALVE IAW DC8 MM 36-12-1 ENG RUN ACCOMPLISHED, SYSTEM OPS CHECK NORMAL IAW DC8 MM 36-12-58.