What was found
(CAN) DURING CLIMB THROUGH LEVEL 280, CABIN PRESSURE RED WARNING LIGHT CAME ON. RAPID DEPRESSURIZATION DRILL CARRIED OUT, BUT CABIN REACHED 11,000 FEET. FLIGHT RETURNED TO BLOCKS. BOTH CONTROLLERS REPLACED SERVICEABLE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) DURING CLIMB THROUGH LEVEL 280, CABIN PRESSURE RED WARNING LIGHT CAME ON. RAPID DEPRESSURIZATION DRILL CARRIED OUT, BUT CABIN REACHED 11,000 FEET. FLIGHT RETURNED TO BLOCKS. BOTH CONTROLLERS REPLACED SERVICEABLE.