What was found
LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. CREW REPORTED HEARING THUMP, THEN GEAR RETRACTED. ACFT DOWN LINKED CFDS FAULT MAG LT LG EXT PROXIMITY SENSOR 23 GA & LT LG EXT SENSOR 21GA. REPACKED LT MLG STRUT, PERFORMED ADJUSTMENT TEST, OPERATIONS CHECKED GOOD IAW AMM 32-11-13.