What was found
(CAN) DURING APPROACH, LANDING GEARS WERE SELECTED DOWN: BOTH MLG EXTENDED AND LOCKED IN THE EXTENDED POSITION, NLG DOORS AMBER INDICATION ILLUMINATED BUT THE NOSE LANDING GEAR DID NOT EXTEND. LANDING GEAR LEVER WAS RETURNED TO THE RETRACT POSITION: BOTH MLG RETRACTED AND LOCKED, NLG RED LIGHT STAYED ON AND DOOR AMBER LIGHT STAYED ON LANDING GEAR LEVER RETURNED TO EXTEND POSITION: ALL GEARS DOWN AND LOCKED, DOORS CLOSED INSPECTION ON THE GROUND REVEALED: NLG DOOR SRPING BROKE IN FLIGHT JAMMING NLG DOOR AND PREVENTING THE NLG TO EXTEND.