As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LANDING GEAR LEVER WOULD NOT MOVE TO THE UP POSITION AFTER TAKEOFF FROM MSY. QRH PROCEDURES WERE COMPLIED WITH AND THE AIRCRAFT WAS RETURNED TO MSY WHERE IT LANDED SAFELY. MAINTENANCE FOUND THE GROUND SPOILER INTERLOCK VALVE AT FAULT. THE GROUND SPOILER INTERLOCK VALVE WAS REMOVED AND REPLACED AND SAFETY SENSORS WERE ADJUSTED IAW MM 27-62-61. THE GEAR WAS SWUNG SEVERAL TIMES AND OPERATIONAL CHECKS WERE GOOD.