PA-30 flight instructor reported that a student lost control of the aircraft during takeoff; resulti...

Attributes
ACN	1695950
Time
Date	201910
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	PA-30 Twin Comanche
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 1456 Flight Crew Type 45
Person 2
Function	Pilot Flying Trainee
Qualification	Flight Crew Student Flight Crew Instrument Flight Crew Private
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 233 Flight Crew Type 8
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Ground Strike - Aircraft Ground Event / Encounter Loss Of Aircraft Control

Narrative:

Upon completion of run up; engine failure on runway scenario was briefed; as well as engine fail scenarios after takeoff. We continued taxi to runway xxl. I took control of radios; got takeoff clearance from tower; student completed final pre-takeoff items. Once aligned with runway; student smoothly applied full power. Once the aircraft reached full power; I cut the power lever on the left engine; to simulate an engine failure. Student became confused by sudden left yaw; and lost control of the aircraft. I repeatedly said; 'abort' 'abort.' I was unable to apply any brake due to a lack of brakes on instructor side. (Brakes only installed on left side.) student confused and flustered; returned idle power lever to full position. I loudly said 'my controls' 'my controls.' student then passed me the controls. Once he let go of the control wheel; the aircraft ascended into ground effect; albeit at too slow a speed. I promptly reduced power; and the plane quickly descended to the runway in a slight left bank attitude; and hit the surface; when I believe the gear collapsed; and the aircraft skidded to the left edge of the runway.

Original NASA ASRS Text

Title: PA-30 flight instructor reported that a student lost control of the aircraft during takeoff; resulting in a gear collapse and damage to the aircraft.

Narrative: Upon completion of run up; engine failure on runway scenario was briefed; as well as engine fail scenarios after takeoff. We continued taxi to Runway XXL. I took control of radios; got takeoff clearance from Tower; Student completed final pre-takeoff items. Once aligned with runway; student smoothly applied full power. Once the aircraft reached full power; I cut the power lever on the left engine; to simulate an engine failure. Student became confused by sudden left yaw; and lost control of the aircraft. I repeatedly said; 'abort' 'abort.' I was unable to apply any brake due to a lack of brakes on instructor side. (Brakes only installed on left side.) Student confused and flustered; returned idle power lever to full position. I loudly said 'my controls' 'my controls.' Student then passed me the controls. Once he let go of the control wheel; the aircraft ascended into ground effect; albeit at too slow a speed. I promptly reduced power; and the plane quickly descended to the runway in a slight left bank attitude; and hit the surface; when I believe the gear collapsed; and the aircraft skidded to the left edge of the runway.

Data retrieved from NASA's ASRS site 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.