Saturday, December 25, 2021

Collision During Takeoff: Cessna 150L, N1972L; accident occurred June 30, 2021 at Mud Lake Airport (1U2), Terreton, Jefferson County, Idaho

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; Salt Lake City

Investigation Docket - National Transportation Safety Board:

Location: Terreton, Idaho 
Accident Number: WPR21LA255
Date and Time: June 30, 2021, 12:20 Local 
Registration: N1972L
Aircraft: Cessna 150 
Aircraft Damage: Substantial
Defining Event: Collision during takeoff/land 
Injuries: 2 Serious
Flight Conducted Under: Part 91: General aviation - Personal


The pilot reported that, he had just landed when he thought that he saw a crop duster airplane descending for a short base for landing on the opposite runway. The pilot initiated a go around with the flaps still extended and with a high-density altitude. The airplane attained an altitude of about 50 to 100 ft above ground level when the airplane stalled, and the left wing dropped. The pilot attempted to recover but did not have enough altitude before the airplane collided with the ground. The airplane nosed over and came to rest inverted. The wings and fuselage were substantially damaged. 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 exceedance of the airplane's critical angle of attack during a go-around, which resulted in an aerodynamic stall and subsequent impact with terrain. 


Personnel issues Decision making/judgment - Pilot
Aircraft Angle of attack - Not attained/maintained
Personnel issues Aircraft control - Pilot
Environmental issues High density altitude - Effect on operation

Factual Information

History of Flight

Landing-aborted after touchdown Collision during takeoff/land (Defining event)

Pilot Information

Certificate: Airline transport; Commercial; Flight instructor; Private
Age: 51, Male
Airplane Rating(s): Single-engine land; Multi-engine land
Seat Occupied: Right
Other Aircraft Rating(s): None 
Restraint Used: Lap only
Instrument Rating(s): Airplane
Second Pilot Present:
Instructor Rating(s): Airplane multi-engine; Airplane single-engine; Instrument airplane
Toxicology Performed:
Medical Certification: Class 1 Without waivers/limitations
Last FAA Medical Exam: April 26, 2021
Occupational Pilot: Yes
Last Flight Review or Equivalent: June 19, 2021
Flight Time: (Estimated) 12960 hours (Total, all aircraft), 500 hours (Total, this make and model), 10730 hours (Pilot In Command, all aircraft), 185 hours (Last 90 days, all aircraft), 46 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N1972L
Model/Series: 150L 
Aircraft Category: Airplane
Year of Manufacture: 1972 
Amateur Built:
Airworthiness Certificate: Utility 
Serial Number: 15073272
Landing Gear Type: Tricycle 
Seats: 2
Date/Type of Last Inspection: June 16, 2021 Annual 
Certified Max Gross Wt.: 1500 lbs
Time Since Last Inspection: 2.5 Hrs
Engines: 1 Reciprocating
Airframe Total Time: 7135.9 Hrs as of last inspection
Engine Manufacturer: Continental
ELT: Installed
Engine Model/Series: O-200-A
Registered Owner: 
Rated Power: 100 Horsepower
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KRXE,4862 ft msl 
Distance from Accident Site: 30 Nautical Miles
Observation Time: 11:10 Local 
Direction from Accident Site: 92°
Lowest Cloud Condition: Clear 
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: 30.23 inches Hg 
Temperature/Dew Point: 32°C / 10.6°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Terreton, ID 
Type of Flight Plan Filed: None
Destination: Terreton, ID 
Type of Clearance: None
Departure Time: 
Type of Airspace: Class G

Airport Information

Runway Surface Type: Asphalt
Airport Elevation: 4794 ft msl 
Runway Surface Condition: Dry
Runway Used: 02/20
IFR Approach: None
Runway Length/Width: 3300 ft / 40 ft 
VFR Approach/Landing: Go around; Traffic pattern

Wreckage and Impact Information

Crew Injuries: 1 Serious
Aircraft Damage: Substantial
Passenger Injuries: 1 Serious
Aircraft Fire: None
Ground Injuries:
Aircraft Explosion: None
Total Injuries: 2 Serious 
Latitude, Longitude: 43.850944,-112.50136(est)

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