What was found
DURING ENGINE START, THE PILOT REPORTED THE NR 1 ENGINE EGT OVERLIMIT, DURING THE NR 1 ENGINE START, EGT INDICATION WENT TO MAX DISPLAYED EGT ON THE NEEDLE AND DIGITAL 818°C, NR 1 ENGINE MASTER WAS SET TO OFF, THEN THE NR 1 ENGINE INDICATIONS DISPLAY XX, THEN APPEARED AGAIN. MAINTENANCE PERSONNEL PERFORMED A FAULT ANALYSIS IAW TSM 77-00-00-810-930-A AND 77-20-00-810-801-B, PERFORMED DRY OUT PROCEDURE OF THE EGT JUNCTION BOX IAW AMM 77-21-43-350-801-A, THEN PERFORMED A NR 1 ENGINE IDLE RUN IAW AMM 71-00-00-710-012-B, VERIFIED THE EGT PARAMETERS ARE SHOWN NORMAL. THE AIRCRAFT WAS RETURNED TO SERVICE