As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING T/C 78273000, LONG TIME FAULT 73-20811 "THE T12 SIGNAL IS OUT OF RANGE" WAS FOUND FOR LEGS 1, 2, & 3 ON ENG #1. GROUNDED - YES. REF LP 60206442 FOR T12 SENSOR REPLACEMENT THAT CLEARED THIS FAULT ON THE EEC BITE TEST. FLIGHT VERIFICATION RECOMMENDED TO CLEAR THIS FAULT FROM "RECENT FAULTS" ON CDU INTERROGATION.