Saturday, September 04, 2021

Collision During Landing: Brunner-Winkle Bird CK, N933V; accident occurred September 09, 2020 at Enterprise Municipal Airport (8S4), Wallowa County, Oregon

Aviation Accident Final Report - National Transportation Safety Board

The National Transportation Safety Board did not travel to the scene of this accident. 

Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; Boise 

Investigation Docket - National Transportation Safety Board: Enterprise, Oregon
Accident Number: WPR20LA309
Date & Time: September 10, 2020, 19:00 Local 
Registration: N933V
Aircraft: Bird CK Aircraft
Damage: Substantial
Defining Event: Collision during takeoff/landing 
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Personal


The pilot reported that, before landing, the throttle was increased to maintain altitude to correct his position over the runway, however, the engine sputtered and the airplane lost altitude and the main landing gear touched the runway. Being angled on the runway, the pilot applied full power to go-around and change direction away from hangars. The pilot expected to climb; however, the airplane would not maintain altitude or climb. The engine was running, but it would not develop enough power to get positive response on the flight controls. The pilot subsequently landed in a field to the right side of the runway. The landing gear collapsed, and both the upper and lower wings were substantially damaged.

While securing the airplane, the pilot reported that the carburetor heat was in the on position during the landing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot’s failure to maintain directional control during landing, which resulted in a runway excursion and collision with terrain. 


Aircraft Directional control - Not attained/maintained
Personnel issues Aircraft control - Pilot
Aircraft (general) - Incorrect use/operation
Environmental issues Rough terrain - Contributed to outcome

Factual Information

History of Flight

Approach-VFR go-around Collision during takeoff/land (Defining event)

Pilot Information

Certificate: Private
Age: 61,Male
Airplane Rating(s): Single-engine land
Seat Occupied: Rear
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None 
Second Pilot Present:
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 With waivers/limitations 
Last FAA Medical Exam: February 25, 2020
Occupational Pilot: No 
Last Flight Review or Equivalent: August 15, 2020
Flight Time: 868 hours (Total, all aircraft), 43 hours (Total, this make and model), 682 hours (Pilot In Command, all aircraft), 39 hours (Last 90 days, all aircraft), 12 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

Passenger Information

Age: Male
Airplane Rating(s): 
Seat Occupied: Front
Other Aircraft Rating(s): 
Restraint Used: 3-point
Instrument Rating(s):
Second Pilot Present:
Instructor Rating(s): 
Toxicology Performed:
Medical Certification: 
Last FAA Medical Exam:
Occupational Pilot: No 
Last Flight Review or Equivalent:
Flight Time:

Aircraft and Owner/Operator Information

Aircraft Make: Bird 
Registration: N933V
Model/Series: CK
Aircraft Category: Airplane
Year of Manufacture: 1931 Amateur Built:
Airworthiness Certificate: Normal
Serial Number: 4018
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: September 15, 2019 Condition
Certified Max Gross Wt.: 2335 lbs
Time Since Last Inspection: 23.6 Hrs
Engines: 1 Reciprocating
Airframe Total Time: 
Engine Manufacturer: Continental
ELT: C91 installed, activated, did not aid in locating accident
Engine Model/Series: W-670-6A-3
Registered Owner: 
Rated Power: 220 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: 
Distance from Accident Site: -1 Nautical Miles
Observation Time: 18:30 Local
Direction from Accident Site:
Lowest Cloud Condition: Clear
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: 30.06 inches Hg 
Temperature/Dew Point: 25.6°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Enterprise, OR
Type of Flight Plan Filed:
Destination: Enterprise, OR 
Type of Clearance: None
Departure Time: 
Type of Airspace: Class G

Airport Information

Airport: Enterprise Municipal Airport 8S4 
Runway Surface Type: Asphalt
Airport Elevation: 3957 ft msl 
Runway Surface Condition: Dry
Runway Used: 30 
IFR Approach: None
Runway Length/Width: 2850 ft / 50 ft
VFR Approach/Landing: Traffic pattern

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: Aircraft
Explosion: None
Total Injuries: 2 None 
Latitude, Longitude: 45.424999,-117.26499(est)


  1. Why is the owner reporting the tail number as NC933V? It is N933V in the registry. NC is not valid.

    1. Using the "C" is optional, when you have an "N" number with the "C"

    2. The CAA to FAA changed in 1958. "N"'s for United States registry, "C"'s for commercial/standard; "R"'s for restricted, "X"'s for experimental, "L"'s for limited.

      You can still write the "NC" in your NTSB and FAA reports.




      Subpart C--Nationality and Registration Marks

      Sec. 45.22 Exhibition, antique, and other aircraft: Special rules.

      (a) When display of aircraft nationality and registration marks in
      accordance with Secs. 45.21 and 45.23 through 45.33 would be
      inconsistent with exhibition of that aircraft, a U.S.-registered
      aircraft may be operated without displaying those marks anywhere on the
      aircraft if:
      (1) It is operated for the purpose of exhibition, including a motion
      picture or television production, or an airshow;
      (2) Except for practice and test fights necessary for exhibition
      purposes, it is operated only at the location of the exhibition, between
      the exhibition locations, and between those locations and the base of
      operations of the aircraft; and
      (3) For each flight in the United States:

      (i) It is operated with the prior approval of the Flight Standards
      District Office, in the case of a flight within the lateral boundaries
      of the surface areas of Class B, Class C, Class D, or Class E airspace
      designated for the takeoff airport, or within 4.4 nautical miles of that
      airport if it is within Class G airspace; or

      (ii) It is operated under a flight plan filed under either
      Sec. 91.153 or Sec. 91.169 of this chapter describing the marks it
      displays, in the case of any other flight.
      (b) A small U.S.-registered aircraft built at least 30 years ago or
      a U.S.-registered aircraft for which an experimental certificate has
      been issued under Sec. 21.191(d) or 21.191(g) for operation as an
      exhibition aircraft or as an amateur-built aircraft and which has the
      same external configuration as an aircraft built at least 30 years ago
      may be operated without displaying marks in accordance with Secs. 45.21
      and 45.23 through 45.33 if:
      (1) It displays in accordance with Sec. 45.21(c) marks at least 2
      inches high on each side of the fuselage or vertical tail surface
      consisting of the Roman capital letter ``N'' followed by:
      (i) The U.S. registration number of the aircraft; or
      (ii) The symbol appropriate to the airworthiness certificate of the
      aircraft (``C'', standard; ``R'', restricted; ``L'', limited; or ``X'',
      experimental) followed by the U.S. registration number of the aircraft;

      (2) It displays no other mark that begins with the letter ``N''
      anywhere on the aircraft, unless it is the same mark that is displayed
      under paragraph (b)(1) of this section.
      (c) No person may operate an aircraft under paragraph (a) or (b) of
      this section--
      (1) In an ADIZ or DEWIZ described in Part 99 of this chapter unless
      it temporarily bears marks in accordance with Secs. 45.21 and 45.23
      through 45.33;
      (2) In a foreign country unless that country consents to that
      operation; or
      (3) In any operation conducted under Part 121, 133, 135, or 137 of
      this chapter.

      [[Page 869]]

      (d) If, due to the configuration of an aircraft, it is impossible
      for a person to mark it in accordance with Secs. 45.21 and 45.23 through
      45.33, he may apply to the Administrator for a different marking

      [Doc. No. 8093, Amdt. 45-5, 33 FR 450, Jan. 12, 1968, as amended by
      Amdt. 45-13, 46 FR 48603, Oct. 1, 1981; Amdt. 45-19, 54 FR 39291, Sept.
      25, 1989; Amdt. 45-18, 54 FR 34330, Aug. 18, 1989; Amdt. 45-21, 56 FR
      65653, Dec. 17, 1991; Amdt. 45-22, 66 FR 21066, Apr. 27, 2001]