What was found
(CAN) THRU 10,000 FEET CABIN ALTITUDE EICAS WARNING. QRH ACTIONED. AIRCRAFT RETURNED TO YYZ WITHOUT INCIDENT. CABIN PRESSURE SELECTOR REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) THRU 10,000 FEET CABIN ALTITUDE EICAS WARNING. QRH ACTIONED. AIRCRAFT RETURNED TO YYZ WITHOUT INCIDENT. CABIN PRESSURE SELECTOR REPLACED.