As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/O CABIN SPIKED AT ABOUT 3000 FPM, DECENT & THERE WAS SIGNIFIGANT AMOUNT OF AIR COMING OUT OF THE WINDSHIELD DEFROSTER VENTS. ABORTED T/O AROUND 50 KIAS THEN NOTED ALL SWITCHES IN CORRECT POSITION, SYSTEM OPERATES NORMALLY DURING ANTI-ICE CHECK. REMOVED AND REPLACED FAULTY LT FLOW CONTROL VALVE IAW CE 560 M/M 21-11. OP AND LEAK CHECKED GOOD. C/W PRESSURIZATION OPERATIONAL CHECK REF M/M 21-31. OP CHECKED GOOD.