What was found
(REF CNTRL NR: 1-15-07) DURING THE TAKEOFF ROLL (APPROXIMATELY 100 KTS), THE CREW EXPERIENCED BOUNCING OF THE AIRCRAFT NOSE WITH INCREASING SEVERITY. THE CREW CONTINUED THE TAKE-OFF SEQUENCE, AND NOTED A RED NOSE GEAR (UNSAFE) INDICATION LIGHT AFTER THE LANDING GEAR WAS SELECTED TO THE RETRACT POSITION. THE NOISE LEVEL IN THE COCKPIT ALSO INDICATED AN EXTENDED NOSE GEAR. CREW SELECTED THE LANIND GEAR TO THE EXTENDED POSITION WHICH RESULTED IN ALL 3 GREEN LANDING GEAR (SAFE) INDICATION LIGHTS AND ADVISED THAT THEY WOULD BE RETURNING BACK DUE TO THE CONDITION AC LANDED WITHOUT INCIDENT. UPON AIRCRAFT SHUTDOWN, AN EXAMINATION OF THE NOSE GEAR REVEALED THE NOSE STRUT WAS COMPLETELY COLLAPSED WITH HYDRAULIC FLU