As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTED ENGINE #3 USING MANUAL START PROCEDURE, CLEARED TO PUSHBACK AND THEN SMELLED SMOKE FOLLOWED BY VISUAL SMOKE. FOLLOWED FIM 21-61 TASK 924, R/R #3 PACK ACM PER AMM 21-51-04/401 AND PERFORMED OPS CHECK PER AMM 21-00-00/201. R/R ENG 3 PRSOV PER AMM 36-11-04/401 AND OPS CHECK COMPLETED PER AMM 71-00-00-705-152-J00.