What was found
WHILE CLIMBING THROUGH HIGH 20S AT 3201/.792 COST INDEX 45, FUEL HAD DEVELOPED A 600 LBS IMBALANCE WITH LT SIDE HEAVY. TURNED LT CENTER PUMP OFF, CROSSFEED CLOSED AND ALL OTHER BOOST PUMPS ON. ABOUT 4 MINUTES LATER AT ABOUT 33,000 LEFT ENGINE VARIED AT MODERATE RATE FROM 101 TO 87. SLOW RETARD TO 86 SETTLED ENG NR 1 AND IT RAN FINE FOR REST OF FLIGHT. -PERFORMED NR 1 ENG EXCEEDANCE FIM TASK 71-00-00-740-801, NO ENGINE EXCEEDANCES NOTED. PERFORMED NR 1 EEC BITE FIM TASK 73-00 TASK 801 FOUND FAULT CODE 73-20331 THE FMV DEMAND AND POSITION SIGNALS DISAGREE. PULLED PCMCIA CARD DOWN LOADED TO DOWNLOADED DATA & REINSTALLED PCMCIA CARD HMU. R & R NR 1 HMU IAW EA 800-73EA-09873. EA 800-73EA-09873 COMPLIED WITH.