As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK DUE TO LANDING GEAR WOULD NOT RETRACT, FOLLOWED LANDING GEAR LEVER INTERLOCK CHECKLIST GEAR STILL WOULD NOT RETRACT. FOUND LANDING GEAR CONTROL MODULE (2GA) FAULTY. REMOVED AND REPLACED 2GA PER AMM 32-31-11-4 UP TO STEP C, INSTALLATION. PERFORMED TEST OF L/G NORMAL CONTROL MICROSWITCH UNIT IAW MM 32-31-11-4. PERFORMED NORMAL EXTENSION AND RETRACTION TEST IAW MM 32-31-00-5