As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT AT APPROX 8000, LEFT ENG EGT INCREASE INTO RED RADIAL MAX EGT OF 789. LEFT THROTTLE RETARD TO IDLE AFTER APPROX 2 MINUTES EGT WITHIN NORMAL LIMITS. THROTTLE ADVANCE BACK TO CLIMB POWER AND ALL ENGINES INDICATION ARE NORMAL. REPLACED NR 1 ENG PER TRANS 6T103.