Narrative:

Lesson with pre-private student (post solo). Lesson sheet was for specialty takeoff and landing. First time this was to be done with student. Also on the lesson sheet was a suggested item 'engine failure during takeoff.' generally most instructors fail the engine (by retarding the throttle) after leaving the ground. On an earlier lesson the student was introduced on the ground trainer to engine failures at 50 ft, 800 ft AGL and en route. Before the first takeoff, I told the student to do a short field takeoff and I called the tower and asked for an option on takeoff so we could abort the takeoff and tower would expect it. I do short field takeoffs to engine failure to bring about the point to the student how much they need to lower the nose in the event of a red engine failure on a solo. We took off and at 50 ft I pulled the throttle and told the student he lost his engine (as I always do during engine failures/forced lndgs). The student froze on the controls, pulling back. I tried to push forward and we hit the runway 'flat.' the nosewheel was slightly higher than the mains. There was some damage to the aircraft, but it does not fit the NTSB definition as an accident. The damage was far from substantial. In the future I will not surprise the student at this altitude (only in the ground training). I will first demonstrate the aborted takeoff at 50 ft then I will closely follow him/her as they do it knowing what will happen in advance.

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Original NASA ASRS Text

Title: STUDENT PLT MADE HARD LNDG DAMAGING ACFT AS A RESULT OF INSTRUCTOR INDUCED PRACTICE ENG FAILURE DURING INITIAL CLB AFTER TKOF.

Narrative: LESSON WITH PRE-PVT STUDENT (POST SOLO). LESSON SHEET WAS FOR SPECIALTY TKOF AND LNDG. FIRST TIME THIS WAS TO BE DONE WITH STUDENT. ALSO ON THE LESSON SHEET WAS A SUGGESTED ITEM 'ENG FAILURE DURING TKOF.' GENERALLY MOST INSTRUCTORS FAIL THE ENG (BY RETARDING THE THROTTLE) AFTER LEAVING THE GND. ON AN EARLIER LESSON THE STUDENT WAS INTRODUCED ON THE GND TRAINER TO ENG FAILURES AT 50 FT, 800 FT AGL AND ENRTE. BEFORE THE FIRST TKOF, I TOLD THE STUDENT TO DO A SHORT FIELD TKOF AND I CALLED THE TWR AND ASKED FOR AN OPTION ON TKOF SO WE COULD ABORT THE TKOF AND TWR WOULD EXPECT IT. I DO SHORT FIELD TKOFS TO ENG FAILURE TO BRING ABOUT THE POINT TO THE STUDENT HOW MUCH THEY NEED TO LOWER THE NOSE IN THE EVENT OF A RED ENG FAILURE ON A SOLO. WE TOOK OFF AND AT 50 FT I PULLED THE THROTTLE AND TOLD THE STUDENT HE LOST HIS ENG (AS I ALWAYS DO DURING ENG FAILURES/FORCED LNDGS). THE STUDENT FROZE ON THE CTLS, PULLING BACK. I TRIED TO PUSH FORWARD AND WE HIT THE RWY 'FLAT.' THE NOSEWHEEL WAS SLIGHTLY HIGHER THAN THE MAINS. THERE WAS SOME DAMAGE TO THE ACFT, BUT IT DOES NOT FIT THE NTSB DEFINITION AS AN ACCIDENT. THE DAMAGE WAS FAR FROM SUBSTANTIAL. IN THE FUTURE I WILL NOT SURPRISE THE STUDENT AT THIS ALT (ONLY IN THE GND TRAINING). I WILL FIRST DEMONSTRATE THE ABORTED TKOF AT 50 FT THEN I WILL CLOSELY FOLLOW HIM/HER AS THEY DO IT KNOWING WHAT WILL HAPPEN IN ADVANCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.