What was found
ON DESCENT FROM FL250, THE CABIN PRESSURE SPIKED TO 12500, THE CABIN LIGHTS ILLUMINATED AND THE NO SMOKING/SEATBELT SIGNS ILLUMINATED. THE POWER LEVERS WERE AT IDLE DUE TO TURBULENCE. THE ALT WARN ANNUNCIATOR DID NOT ILLUMINATE AND THE PAX O2 MASKS DID NOT DEPLOY. WHEN POWER WAS ADDED AND THE RATE WAS INCREASED THE CABIN DESCENDED BELOW 10000 AND WORKED PROPERLY. NOTED THAT SYS ACTIVATED AT 12100 FT. BUT THE OXYGEN MASKS DID NOT DEPLOY. INSPECTED AND FOUND ALL OXYGEN MASK DOOR STRIKERS ADJUSTED TO LOWEST SETTING. READJUSTED THE STRIKERS ON ALL OXYGEN MASK BOX DOORS AND REINSTALLED DOORS. PERFORMED OPS CHECK OF OXYGEN MASK BLOW DOWN SYS WITH MANUAL DEPLOYMENT AND NOTED ALL MASKS DEPLOYED. RESTOWED MASKS AND OXYGEN MASK BOX DOORS.