What was found
CREW REPORTED – AIRCRAFT DECOMPRESSED AND LOST ALL CABIN PRESSURE. CREW ON O2. CABIN ALTITUDE CLIMBED TO 15,000 FEET. DECLARED EMERGENCY/RETURNED TO KYIP. USA JET MAINTENANCE AT KYIP PRESSURIZED AIRCRAFT I/A/W DA-20 MM 21-30-05. OPS CHECK WAS GOOD. NO DEFECTS NOTED. ALSO INSPECTED AIRCRAFT FOR LEAKS. NO LEAKS. PERFORMED OPS CHECK OF R/H MLG SQUAT SWITCH 17G2 I/A/W DA-20 MM 32-60-10. OPS CHECK GOOD, SWITCH OPERATES NORMAL. ALSO MANUALLY PRESSURIZED AIRCRAFT I/A/W DA-20 MM 21-30-05. AIRCRAFT REACHES MAX CABIN ALTITUDE, OPS CHECK NORMAL. AIRCRAFT WAS SUBSEQUENTLY TEST FLOWN TO OPS CHECK THE PRESSURIZATION SYSTEM. THE TEST FLIGHT WAS SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE.