What was found
LOWERED GEAR HANDLE FOR LANDING, RECEIVED GEAR DISAGREE WARNING. BOTH MAIN GEAR FAILED TO EXTEND. RAN QRH. MANUAL EXTENSION SUCCESSFUL, EMERGENCY ACTIONS, R & R MLG EXTENTION AND RETRACTION SELECTOR VLAVE IAW AMM 32-32-10 AND IPC 32-32-10, FIG 1 ITEM 30. OPS CHECKS AND FUNCTIONAL CHECK GOOD ACFT OK FOR SVC, ALL RII COMPLIED IAW GMM 3-3.