As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O AIRSPEED INDICATOR GOT MACH AND UMO FLAGS IN VIEW DURING TAXI-OUT. UMO FLAG IN VIEW ON F/O MACH A/S INDICATOR NR 2 MACH A/S AURAL WARNING WOULD NOT TEST. UMO FLAG MOVED TO ITEM 2M, MACH FLAG DEF PER MEL 34-3-2 CTRL NR 4287 CAT C PLA INSTALLED. SEE RESTRICTIONS. 2) DEF PER MEL 34-4-1 CTRL NR 4288 CAT B PLA INSTALLED SEE RESTRICTIONS.