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NTSB Report
August 29, 2023 · Yamaha Fazer SAR · N53GR
Reno, NV
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 29, 2023
Injury Outcomes
No injuries (2 uninjured)
Location
Reno, NV
Aircraft
Yamaha Fazer SAR (2021)
Tail Number
N53GR
Operator
Drone America
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR23LA330
The operator of the uncrewed aircraft system (UAS) reported that, he and an external emergency safety pilot were conducting an engineering test flight to fine tune the autopilot’s tail rotor yaw limits. While hovering at 50 ft agl, the operator incorrectly input a full left tail rotor command, causing the UAS to begin a rapid counterclockwise rotation. The auto pilot was unable to maintain a level attitude or stabilize the UAS during the rotation, and descended uncontrollably. The safety pilot attempted to stabilize the UAS manually, using the emergency RC controller, to no avail. The UAS impacted the surface, resulting in substantial damage to the tailboom. The operator of the UAS reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.
NTSB Probable Cause
The operator’s incorrect input into the ground station controller, resulting in a loss of control during flight and subsequent impact with terrain.
Full Narrative
The operator of the uncrewed aircraft system (UAS) reported that, he and an external emergency safety pilot were conducting an engineering test flight to fine tune the autopilot’s tail rotor yaw limits. While hovering at 50 ft agl, the operator incorrectly input a full left tail rotor command, causing the UAS to begin a rapid counterclockwise rotation. The auto pilot was unable to maintain a level attitude or stabilize the UAS during the rotation, and descended uncontrollably. The safety pilot attempted to stabilize the UAS manually, using the emergency RC controller, to no avail. The UAS impacted the surface, resulting in substantial damage to the tailboom. The operator of the UAS reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.
Flight
Event TypeAccident
Event Time10:05 PDT
Nearest AirportReno/Stead (1nm NNW)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftYamaha Fazer SAR
Tail NumberN53GR
Aircraft CategoryHeli
DamageSubstantial
OperatorDrone America
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsYamaha Motor Co · Fazer R · Reciprocating · 27
Seats0
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 72 · Second Class · None
Crew 2Age 38 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 8 kt, gusting 14 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point23 F
Altimeter30.16 inHg
Observation Time09:55
Weather SourceWFAC