What was found
FLT NR 9873 - STA 31J - THE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF FROM 31J (AERO CORP). THERE WAS NO GROUND SHIFT TO AIRBORNE. THE AIRCRAFT WAS RETURNED TO 31J WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE RE-RIGGED THE GROUND SENSE AND ANTI-RETRACTION LEVER IAW MM 32-23-1 AND OPERATION CHECKED GOOD. IN ADDITION, THE NLG POSITION INTERLOCK SWITCH WAS REMOVED AND REPLACED. A GEAR SWING WAS PERFORMED IAW MM 32-30 AND OPERATION CHECKED GOOD. (M)