What was found
(CAN) NLG LIGHT WOULD NOT COME ON TO INDICATE DOWN AND LOCKED. FLY-BY INDICATED NLG IN LANDING POSITION. AIRCRAFT LANDED AND NOSE GEAR COLLAPSED SHORTLY AFTER TOUCHDOWN. MOST FLUID LOST DUE TO PERFORATED PRESSURE LINE P/N 95153-43 AFTER GEAR SELECTED UP. EMERGENCY GEAR DOWN MECHANISM FAILED TO LOCK THE GEAR DOWN DUE TO SPRING P/N 96178-00 WAS OFF ITS HOOKS. SPRING RECONNECTED AND LINE REPLACED.