As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT SMOKE IN COCKPIT & CABIN FOLLOWED BY APU FAIL CAUTION ON EICAS. INSPECTED & COMPLIED WITH ETN-EM-72-034. FOUND APU TO BE SOURCE FOR THE SMELL. DEFERRED APU IAW MEL 49-1. R & R APU REF WC 49-800-05. OPERATIONS CHECKED GOOD AT THIS TIME & MEL RESTORED.