What was found
PILOT REPORT, DURING TAKEOFF IN SKCL AT 60 KNOTS AND ADJUSTING TAKEOFF FLEX THRUST AID PRESSURIZATION IN AUTO NR 1 OUT FLOW VALVE WENT TO FULL CLOSED, TAKEOFF WAS DISCONTINUED. PRESSURIZATION WAS SWITCHED TO AUTO, NR 2 WORKING NORMALLY. AS PER AMM 21-32-00 PG 201 ACCOMPLISHED BITE PROCEDURE TO BOTH CABIN PRESSURE CONTROLLER, NO HELP. TRANSFER TO DMI 21-24-CATEGORY-C. CABIN PRESSURE CONTROLLER NUMBER 1 WAS REPLACED. TEST ON GROUND WAS SATISFACTORY IN ACCORDANCE WITH AMM 21-32-03 PAGE 2001.