What was found
GEAR DISAGREE WARNING MSG. T/S & FOUND ALL 3 GEAR TO CYCLE PROPERLY WITH THE NLG AFT DOOR DISCONNECTED UPON FURTHER INVESTIGATION FOUND NLG AFT DOOR LT UPPER HINGE LUG (AIRFRAME SIDE) TO BE INSTALLED UPSIDE DOWN WHICH CAUSED THE HINGE BUSHINGS TO CRACK/BREAK AND THE DOOR TO BIND. REMOVED & REINSTALLED NLG AFT DOOR LT UPPER HINGE LUG IN THE PROPER DIRECTION IAW SRM 51-42-21. THEN REMOVED & REPLACED NLG AFT DOOR UPPER BUSHINGS IAW AMM 32-22-05-960-801. REINSTALLED AFT NLG DOOR & RECONNECTED FWD NLG DOORS IAW AMM 32-22-05-400-801 & 32-22-01-400-801 CYCLED ALL GEAR NUMEROUS TIMES WITH NO ISSUES CHECKS GOOD