What was found
LEFT MAIN LANDING GEAR WOULD NOT RETRACT. RETURNED TO FIELD REPLACED INBOARD GEAR DOOR LATCH ASSEMBLY ON LEFT MAIN GEAR. OPERATED GEAR DOORS SEVERAL TIMES, OPS CHECKS GOOD. SWUNG GEAR SEVERAL TIMES AND FOUND LANDING GEAR CONTROL BOX WOULD NOT LET GEAR RETRACT. REPLACED LANDING GEAR CONTROL AND SWUNG GEAR SEVERAL TIMES, OPS CHECKS GOOD.