What was found
WHILE ACCOMPLISHING T/C 78273000, INTERROGATE THE FMC CDU FOR FAULTS, FOUND FAULT 75-10441, VBV POSITION SIGNAL OUT OF RANGE, NR 1 ENG, LONG TERM FAULT. ACFT GROUNDED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE ACCOMPLISHING T/C 78273000, INTERROGATE THE FMC CDU FOR FAULTS, FOUND FAULT 75-10441, VBV POSITION SIGNAL OUT OF RANGE, NR 1 ENG, LONG TERM FAULT. ACFT GROUNDED.