What was found
UPON MLG EXTEND, LEVER DISAGREE MESSAGE ILLUM WITH BOTH MAINS GREEN & NOSE RED. NLG WOULD NOT EXTEND. RAN CKLST. CYCLED MLG LEVER UP & DOWN, NO CONDITION CHANGE. PULLED FREE-FALL HANDLE. RECEIVED 3 GREEN. LANDED & TAXIED WITHOUT INCIDENT. PERFORMED CHECK OF EXTEN & RETRACT SYS. FOUND THE LG CMD C/B TRIPPED. AFTER PRESSED IN, & CYCLING MLG, C/B TRIPPED. TROUBLESHOT, A FAULTY MLG CONTROL LEVER IAW WD 32-61-50-1. R & R MLG CONTROL LEVER IAW AMM 32-31-01. R & R MLG SELECTOR VALVE LAW AMM 32-31-04, PERFORMED MLG EXTEND & RETRACT SYS CHECKS IAW AMM 32-31-00, & EMER EXTEND TEST IAW AMM 32-35-00, NO FAULTS. BLED MAIN HYD SYS IAW AMM 29-10-00 & PERFORMED BRAKE & EMER PARKING BRAKE SYS BLEEDING LAW AMM 12-13-00.