As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER ENGINE START AND WITH BLEEDS ON THERE WAS AN OIL ODOR AND SMOKE HAZE IN THE CABIN AND COCKPIT. THE ACFT WAS SHUTDOWN AND A RAPID DEPLANEMENT CARRIED OUT. CFR ATTENDED THE SCENE AND PRONOUNCED THE ACFT CLEAR. MAINTENANCE INVESTIGATION FOUND THE NR 1 ENGINE P2.5/P3 SWITCHING VALVE, INSTALLED INCORRECTLY. THE VALVE WAS REINSTALLED IAW THE EMM AND ENGINE RUNS CARRIED OUT WITH NO FURTHER ISSUES.