What was found
(CAN) AIRCRAFT ENCOUNTERED PRESSURIZATION PROBLEMS SPIKING UP TO 2000 FEET MIN. IN ASSOCIATION WITH POWER LEVER MOVEMENT. HIGH BLEED CYCLING ON AND OFF. TURNING RATE KNOB TO MINIMUM HAD NO EFFECT. PRESSURE CONTROLLER REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) AIRCRAFT ENCOUNTERED PRESSURIZATION PROBLEMS SPIKING UP TO 2000 FEET MIN. IN ASSOCIATION WITH POWER LEVER MOVEMENT. HIGH BLEED CYCLING ON AND OFF. TURNING RATE KNOB TO MINIMUM HAD NO EFFECT. PRESSURE CONTROLLER REPLACED.