As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLT DECK HAD BURNED RUBBER SMELL AND PUFF OF BLUE SMOKE FROM VENTS IN FLT DECK ON START RT PACK AT FAULT FOR SMOKE, INSPECTION OF ACM DETERMINED SHAFT FAILURE OF ACM, REPLACED ACM AND OPS CHECKS C/O WITH NO FUTHER FAULTS NOTED IAW AMM 21-51-10-04. TEARDOWN REQUEST FROM REPAIR FACILITY REQUESTED.