As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EGT IND FLUCTUATED BETWEEN 190-490 DEGREES AFTER TAKEOFF, WENT AS LOW AS 75 DEGREES DURING RETURN. T/S IAW AMM 77-21-43-05. REPLACED JUNCTION BOX IAW 77-21-43-04. OPERATED LEFT ENG AT VARIOUS POWER SETTINGS, ALL EGT PARAMETERS NORMAL. OK FOR SERVICE.