As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AZO - FLT 3010 - AFTER TAKEOFF FROM AZO, LANDING GEAR WOULD NOT RETRACT. RETURNED TO AZO AND LANDED WITHOUT INCIDENT. MAINTENANCE ACCOMPLISHED SEVERAL UP AND DOWN CYCLES WITHOUT FAILURE, SIMULATING AIRLOAD AND VIBRATION ON WIRING. SYSTEM OPS CHECKED GOOD IAW BEECH 1900D MM CHAP 32-30-00. AIRCRAFT RETURNED TO SERVICE. (X)