As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR WOULD NOT RETRACT. MAIN BOTTLE PSI 2000. PILOT ELECTED TO ABORT FLIGHT AND RETURNED TO AIRPORT. LANDING GEAR RETRACTION TEST REVEALED MALFUNCTIONING FOLLOW UP CONTROL VALVE. FOLLOW UP CONTROL VALVE REPLACED. NOSE GEAR NOW FUNCTIONS NORMALLY. (M)