As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND SHORT TIME FAULT 73-10351 THE FMV POSITION SIGNALS DISAGREE ON THE NR 1 ENGINE. ACFT GROUNDED. DID FIM 73-25, TASK 804, STEP F-G(1) - (5). WIRING CK'S NORMAL. R & R THE NR 1 HMU IAW T/C'S N8473000 & N8473001 ENG OPS, LEAK & OPS CHECKED GOOD. OK FOR CONTINUED SERVICE.