What was found
MESSAGE NR 77-20871 TOP LEFT EGT SIGNAL T495S4 IS OUT OF RANGE. REPLACED AND TESTED TOP LEFT EGT PROBE (T49.5 S4) FOR NR 1 ENGINE REF MM 77-21-01. EEC BITE/TEST NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MESSAGE NR 77-20871 TOP LEFT EGT SIGNAL T495S4 IS OUT OF RANGE. REPLACED AND TESTED TOP LEFT EGT PROBE (T49.5 S4) FOR NR 1 ENGINE REF MM 77-21-01. EEC BITE/TEST NORMAL.