What was found
(CAN) FLT NR 2455, DURING TAXI OUT, FLT CREW REPORTED SMOKE IN THE CABIN WHEN THE APU BLEED WAS SELECTED. ACFT RETURNED TO GATE. MX REMOVED AND REPLACED APU ASSY IAW AMM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) FLT NR 2455, DURING TAXI OUT, FLT CREW REPORTED SMOKE IN THE CABIN WHEN THE APU BLEED WAS SELECTED. ACFT RETURNED TO GATE. MX REMOVED AND REPLACED APU ASSY IAW AMM.