As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER TASK CARD 78273000 FOUND ECONOMIC FAULT 77-20871 ON NUMBER ONE ENGINE. THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE. DEFERRED PER T/C 78273000. GROUNDED - YES. PERFORMED TASK CARD # 78273000. NO FAULTS FOUND, EITHER RECENT OR HISTORY