What was found
DURING CLIMB, CREW WAS UNABLE TO RETRACT LANDING GEAR. GEAR HANDLE WOULD NOT MOVE PAST THE OFF POSITION TO THE UP POSITION. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. MAINTENANCE REMOVED AND REPLACED THE GROUND SPOILER INTERLOCK VALVE AND GROUND SPOILER INTERLOCK VALVE PROXIMITY SENSOR IAW AMM 27-62-61 AND EA 262506. ACCOMPLISHED MAIN LANDING GEAR OPERATIONAL TEST IAW AMM 32-32-00. SYSYTEM CHECKS NORMAL.