As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, DURING LEFT ENGINE START EGT REACHED 541 EGT. AIRCRAFT RETURNED TO BLOCKS (BTB). PER AMM 71-00-00 AND FIM 71-08 FT 816. MOTORED LT ENGINE AND LET COOL. RESTARTED LT ENGINE, MAX EGT DURING START WAS 399 DEGREES. AIRCRAFT RELEASED FOR SERVICE.