What was found
LANDING GEAR FAILED TO COME UP. RAN QRH PROCEDURE USING LOCK OVERIDE AND GEAR CAME UP. UNCOVERD AND SELECTED TO ALTN POSITION. ALL 3 MLG PINS INSTALLED AND SAFETIED. GEAR LEVER LOCK CB ON P11 PANEL FOUND PULLED AND COLLARED. UNCOLLARED LEVER LATCH CB, ERASED PSEU MEMORY, SIMULATED FLT MODE IAW MM 32-09-02-2. PLACED GEAR HANDLE IN UP POSITION. LANDING GEAR LEVER LATCH CHECKS GOOD. RESTORED ACFT TO GROUND MODE IAW MM 32-09-02-2. REPLACED VMO/MMO S10471 TO THE NORMAL POSITION AND SHEAR WIRED. REMOVED ALL 3 GEAR PINS AND STOWED. ACFT OK TO CONTINUE, RII COMPLIED WITH.