As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 3998 - AFTER TAKEOFF, THE LANDING GEAR WOULD NOT RETRACT WHEN COMMANDED UP. THE AIRCRAFT RETURNED TO IAH WITHOUT INCIDENT WHERE MAINTENANCE FOUND THE RT HAND SQUAT SWITCH OUT OF ADJUSTMENT. MAINTENANCE RE-RIGGED THE RT HAND SQUAT SWITCH IAW BEECH 1900D MM CH 32-60-05, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE AFTER A SATISFACTORY TEST FLIGHT. (X)