What was found
PILOT WRITE-UP; "IN CRUISE "CABIN ALTITUDE" LIGHT ILLUMINATED." AFTER THE FLIGHT CREW NOTED THIS ISSUE, THEY CONTACTED ATC, DECLARED AN EMERGENCY, AND ACCOMPLISHED AN ATB TO KELP FROM WHICH THEY DEPARTED. THE CREW ALSO WROTE UP THAT ON THE BLEED OFF TAKE-OFF, A RT BLEED TRIP LIGHT ILLUMINATED. MX WAS FLOWN INTO KELP FROM KTOL (WHERE OUR MAIN MX BASE IS LOCATED) TO FIX THE ISSUE. THE RIGHT RT ENGINE HIGH STAGE BLEED VALVE WAS FOUND TO BE STUCK PARTIALLY OPEN AND WAS REPLACED IAW THE AMM. THIS STUCK VALVE WAS THE SOURCE OF THE BLEED TRIP LIGHT DUE TO THE 180 PSI SWITCH IN THE BLEED AIR REGULATOR BEING ACTUATED BY THE 9TH STAGE AIR AT T.O. POWER. THE PRESSURIZATION SYSTEM WAS INSPECTED PER THE AMM WITH NO DEFECTS NOTED. DUE TO THE FULL FUEL LOAD, AN OVERWEIGHT LANDING INSPECTION WAS ALSO ACCOMPLISHED IAW THE AMM. THE PIC DEEMED THE LANDING WAS NOT A "HARD LANDING" SO THE AMM WAS FOLLOWED DURING THE OVERWEIGHT LANDING INSPECTION.