As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AS ACFT APPROACHED FIRE TO DROP LOAD, ENG NR 1 SURGE WAS NOTICED, FOLLOWED BY OVER TEMP CONDITION, POWER LEVER WAS RETARDED. AS ACFT PASSED THROUGH SMOKE ENGINE OPS RETURNED TO NORMAL. ENG PRECAUTIONARY SHUTDOWN WAS DONE DUE TO OVER TEMP.