What was found
AZO - FLT 3010 - AFTER TAKEOFF FROM AZO, LANDING GEAR WOULD NOT RETRACT. RETURNED TO AZO AND LANDED WITHOUT INCIDENT. MAINTENANCE ACCOMPLISHED SEVERAL UP AND DOWN CYCLES WITHOUT FAILURE. APPLIED REFRIGERANT TO RIGHT LANDING GEAR SQUAT SWITCH AND THE GEAR DID NOT RETRACT. REMOVED AND REPLACED THE RIGHT SQUAT SWITCH IAW BEECH 1900D MM CHAP 32-60-05. SYSTEM OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)