What was found
AIR TURNBACK, 1ST EVENT-- AFTER T/O, BLEEDS OFF, COULD NOT GET NR 2 ENG BLEED TO COME ON. ALSO, CABIN CLIMBING WITH THE A/C. REPLACED NR 2 BLEED AIR SHUT-OFF VALVE. 2ND EVENT REF LP 7730322 UNABLE TO PRESSURIZE CABIN. REMOVED AND REPLACED CABIN PRESS CONTROLLER (S/N 3182) AND PRESSURE CONTROL PANEL (S/N 2563). HISTORY: A/C HAS NO RELATED HISTORY IN LAST 9 MONTHS, CABIN PRESSURE CONTROLLER WAS REPLACED AFTER FERRYING TO PHX M+E= 03-2130-9-0003 (S/N 3182) ORIGINAL PART, (S/N 5112) WAS IN FOR SHOP VISIT 4/25/00 FOR CABIN PRESS CLIMBING -- REMAIN OPEN PENDING REVIEW OF TEARDOWN REPORT.