Thursday, April 13, 2017

Tercel USA, Tinz Gyro LLC, N528WM: Accident occurred September 17, 2016 at Blairstown Airport (1N7), Warren County, New Jersey

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

NTSB Identification: GAA16CA499 
14 CFR Part 91: General Aviation
Accident occurred Saturday, September 17, 2016 in Blairstown, NJ
Probable Cause Approval Date: 05/15/2017
Aircraft: ALEX MICHAEL BANTUM/TERCEL USA TERCEL-GYROPLANE, registration: N528WM
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

According to the solo student pilot, the experimental, amateur-built gyrocopter was positioned for takeoff on the runway and stopped with the brakes set. 

He recalled that he engaged the prerotor, increased the main rotor speed to 180 rpm, then disengaged the prerotor, released the brake, and applied full throttle. 

He reported that, “this is where I made my mistake. At this point I should have brought the control stick all the way back, but did not.” He recalled that the gyrocopter was moving forward rapidly but that the rotor rpm decreased and that he then pulled the control stick aft. He reported that the rotor blades were flapping, the control stick became uncontrollable, and the gyrocopter exited the runway to the left. 

The student pilot reduced the throttle to idle, and during the runway excursion, the left main and the nose landing gear separated from the gyrocopter. The main rotor blade struck the ground, the blade grip sustained substantial damage, and the rotor head partially separated from the frame. 

The student pilot reported that there were no preaccident mechanical malfunctions or anomalies with the airframe or the engine that would have prevented normal operation. 

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The student pilot’s incorrect takeoff procedure, which resulted in a loss of main rotor rpm and the subsequent loss of directional control and runway excursion.

TINZ GYRO LLC: http://registry.faa.gov/N528WM

Docket And Docket Items - National Transportation Safety Board: https://dms.ntsb.gov/pubdms 

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf 

Federal Aviation Administration / Flight Standards District Office; Allentown, Pennsylvania 

NTSB Identification: GAA16CA499
14 CFR Part 91: General Aviation
Accident occurred Saturday, September 17, 2016 in Blairstown, NJ
Aircraft: ALEX MICHAEL BANTUM/TERCEL USA TERCEL-GYROPLANE, registration: N528WM
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

According to the solo student pilot, the experimental amateur built gyrocopter was positioned for takeoff on the runway, and stopped with the brakes set.

He recalled that he engaged the pre-rotor, increased the main rotor speed to 180 revolutions per minute (rpm), then disengaged the pre-rotator, released the brake, and applied full throttle. 

He reported that, "this is where I made my mistake. At this point I should have brought the control stick all the way back, but did not." He recalled that the gyrocopter was moving forward rapidly, but the rotor rpm decreased, and he then pulled the control stick aft. He reported that the rotor blades were flapping, the control stick became uncontrollable, and the gyrocopter exited the runway to the left. 

The student pilot reduced the throttle to idle, and during the runway excursion the left main and the nose landing gear separated from the gyrocopter. The main rotor blade struck the ground, the blade grip sustained substantial damage, and the rotor head partially separated from the frame. 

The student pilot reported that there were no mechanical malfunctions or anomalies with the airframe or the engine that would have prevented normal flight operation.

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