As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISP - FLT 4622 - CREW REPORTED THE LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR CONTROL VALVE IAW SAAB MM 32-31-20. OPS AND LEAK CHECK WERE GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)