Challenger CL604
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 8230; Flight Crew Type 1500
Aircraft Equipment Problem Critical
Flight Crew Returned To Departure Airport; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
Challenger 604 (CL-604) departed for a reposition flight.  On the initial climb up to 36;000 FT the outer ply of the pilot's side windscreen broke.  The windscreen cracked completely from top to bottom vertically.  The crew donned the oxygen mask and asked to stop the climb.  The crew then asked to slow and descend.  The crew followed all checklist items.  The crew had to dump fuel to make landing weight.  Crew was cleared by Center to dump on our route back to [departure airport].  The crew's main concern was that the outer glass of the windscreen would break off and enter the left engine.  The aircraft landed safely.
CL-604 Captain reported pilot's windscreen cracked during climb.  Crew ran checklists; dumped fuel; and returned to departure airport.