As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FAULT CODE 73 20341 FMV OUT OF RANGE ON NR 1 ENG SHORT TERM FAULT. ACCOMP FIM 73 25 803 & 75 34 819 CONTINUITY AND RESISTANCE CHECKS NORMAL. EEC BITE CTRL LOOPS INPUT MONITORING SHOWS NO FMV DATA CHANNEL B. ELECTRICALLY SLAVING IN SERVICEABLE HMU CAUSES EEC CHANNEL B FMV DATA TO APPEAR. REMOVED AND REPLACED NR 1 ENG HMU PER MM 73 21 10 000 801 F00 AND 73 21 10 400 801 F00. OPS CHECKS GOOD.