What was found
PILOT REPORTED BLEED VALVE NR 2 CLOSED ADVISORY MESSAGE PRESENT DURING CLIMBOUT, HIGH ALTITUDE WARNING PRESENT AT 17,000 FT, UNABLE TO REMAIN PRESSURIZED, DESCENDED TO 10,000FT TO REMAIN PRESSURIZED. MX R & R NR 1 HIGH STAGE VALVE, PRESSURE SWITCH, AND THE DIGITAL PRESSURE CONTROLLER WITH PRESSURIZATION CHECKED GOOD. ACFT WAS APPROVED FOR RETURN TO SERVICE.