PA-34-200T Turbo Seneca II
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 180; Flight Crew Total 1342; Flight Crew Type 10
Other / Unknown
Aircraft Equipment Problem Critical; Ground Event / Encounter Ground Strike - Aircraft
Aircraft Aircraft Damaged
Aircraft; Human Factors
While on an ATP training flight with a student; and after completing maneuvers; we came back for some pattern work.  The gear was exercised twice during the flight maneuvers; once for an approach to landing stall; and then again for a simulated emergency descent.  While on our initial visual approach; the student put the gear down; the gear warning light came on and then all three gears down lights came on and then the gear warning light went out.  Student verified that the nose wheel was down in the mirror.  Student landed the aircraft with about 5 knots of extra airspeed and only 10 degrees of flaps due to a 10 knot gust factor.  After a normal landing and initial deceleration; the student raised the flaps and then applied takeoff power.  Approaching 70 knots of airspeed (rotation speed); the nose gear abruptly collapsed.  The aircraft slid to a stop on the runway.  After bring mixtures to idle/cut off; throttles to idle and turning off the master switch; the student and I egressed the aircraft.
PA-34 instructor with ATP student in the left seat reports a nose gear collapse during a touch and go resulting damage to the aircraft.