As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPW - PILOT TRAINING, GEAR WILL NOT RETRACT. MAINTENANCE COULD NOT DUPLICATE IN HANGAR ON JACKS. REMOVED AND REPLACED SERVICE VALVE. GEAR SWINGS AND OPERATIONAL CHECK WAS GOOD. TEST FLIGHT FAILED. REMOVED AND REPLACED LANDING GEAR RELAY. GEAR OPERATIONAL NORMAL. (M)