Friday, January 01, 2021

Loss of Control on Ground: Kitfox S7 Super Sport, N399A; accident occurred January 25, 2020 at Phoenix Goodyear Airport (KGYR), Maricopa County, Arizona

Aviation Accident Factual Report - National Transportation Safety Board

Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; Scottsdale, Arizona

Investigation Docket - National Transportation Safety Board:

Location: Goodyear, Arizona
Accident Number: WPR20CA080
Date & Time: January 25, 2020, 08:50 Local
Registration: N399A
Aircraft: MERWIN Kitfox
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Personal

Pilot Information

Certificate: Airline transport; Commercial; Flight instructor
Age: 71, Male
Airplane Rating(s): Single-engine land; Multi-engine land
Seat Occupied: Right
Other Aircraft Rating(s): Gyroplane 
Restraint Used: 4-point
Instrument Rating(s): Airplane 
Second Pilot Present: Yes
Instructor Rating(s): Airplane multi-engine; Airplane single-engine; Gyroplane; Instrument airplane
Toxicology Performed: No
Medical Certification: Class 3 With waivers/limitations 
Last FAA Medical Exam: August 2, 2018
Occupational Pilot: No
Last Flight Review or Equivalent: February 22, 2018
Flight Time: (Estimated) 14000 hours (Total, all aircraft), 5 hours (Total, this make and model), 15 hours (Last 90 days, all aircraft)

Pilot-rated passenger Information

Certificate: Private
Age:  76, Male
Airplane Rating(s): Single-engine land
Seat Occupied: Left
Other Aircraft Rating(s): None Restraint Used: 4-point
Instrument Rating(s): None 
Second Pilot Present: Yes
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: BasicMed None
Last FAA Medical Exam:
Occupational Pilot: No 
Last Flight Review or Equivalent: January 25, 2020
Flight Time: (Estimated) 302 hours (Total, all aircraft), 6 hours (Total, this make and model), 302 hours (Pilot In Command, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: MERWIN 
Registration: N399A
Model/Series: Kitfox S7 Super S 
Aircraft Category: Airplane
Year of Manufacture: 2019 Amateur Built: Yes
Airworthiness Certificate: Experimental light sport (Special)
Serial Number: KA12273245
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: Unknown 
Certified Max Gross Wt.: 1320 lbs
Time Since Last Inspection: 
Engines: 1 Reciprocating
Airframe Total Time: 6 Hrs at time of accident
Engine Manufacturer: Rotax
ELT: C91 installed, not activated 
Engine Model/Series: 912ULS
Registered Owner: 
Rated Power: 100 Horsepower
Operator: On file 
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KGYR,968 ft msl 
Distance from Accident Site: 1 Nautical Miles
Observation Time: 08:47 Local 
Direction from Accident Site: 226°
Lowest Cloud Condition: Scattered / 25000 ft AGL 
Visibility: 10 miles
Lowest Ceiling: None 
Visibility (RVR):
Wind Speed/Gusts: /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.09 inches Hg 
Temperature/Dew Point: 12°C / 6°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Goodyear, AZ (GYR)
Type of Flight Plan Filed: None
Destination: Goodyear, AZ (GYR) 
Type of Clearance: None
Departure Time: 08:00 Local 
Type of Airspace: Class D

Airport Information

Airport: Phoenix Goodyear GYR
Runway Surface Type: Asphalt
Airport Elevation: 969 ft msl
Runway Surface Condition: Dry
Runway Used: 21
IFR Approach: None
Runway Length/Width: 8500 ft / 150 ft VFR
Approach/Landing: Touch and go;Traffic pattern

Wreckage and Impact Information

Crew Injuries: 2 None 
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: N/A 
Aircraft Explosion: None
Total Injuries: 2 None 
Latitude, Longitude: 33.423332,-112.375274(est)

1 comment:

  1. Possibly experience a severe shimmy while rolling out from a fast landing. Could have shook or thrown one or two of the chains making tailwheel uncontrollable without greater rudder imputs. Just guessing after reading pilots description during rollout. With two occupants the tail spring could compress or sag enough to create a negative castor of tailwheel shaft, causing worse shimmy. Weak tailwheel spring causing sag and negative castor could be contributing. Slowing down as much as possible helps prevent a violent shimmy. Having a correct setup is best solution. I notice this problem on many tailwheel planes.