As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN TO YYZ FLIGHT 7546 DURING TAKEOFF ROLL THE CREW SMELLED SMOKE. THE CREW EXECUTED A REJECTED TAKEOFF AT APPROX 100KTS THEN RECEIVED A PACK-1 FAIL EICAS MESSAGE. THE SMOKE SMELL DIMINISHED AT THIS TIME. AIRCRAFT RETURNED TO THE GATE. MAINTENANCE PLACED THE NR 1 AIR CONDITIONING PACK ON MEL. REMAINS ON MEL. NO COMPONENTS CHANGED AS OF THIS DATE. WILL UP DATE WHEN CORRECTIVE ACTION IS ACCOMPLISHED.