As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WORKING TC78273000 FAULT CODE 77-20872 WAS NOTED. #2 ENG TOP LEFT EGT SIGNAL IS OUT OF RANGE, ECONOMIC FAULT. GROUNDED - YES. (RESOLVED ON W/O: 1967913 TASKCARD: N/R-00002 ) PERFORMED T/C 78273000 NO FAULTS DETECTED AT THIS TIME.THIS CLEARS PLT C/N 0308534 REMOVED, SEAMC TODD NOTIFIED.