Tuesday, March 22, 2022

Loss of Control on Ground: Piper L-18C Super Cub, N968SW; accident occurred March 07, 2022 at Nampa Municipal Airport (KMAN), Canyon County, Idaho

Aviation Accident Final Report - National Transportation Safety Board

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

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

Investigation Docket - National Transportation Safety Board:

Location: Nampa, Idaho
Accident Number: WPR22LA120
Date and Time: March 7, 2022, 15:21 Local
Registration: N968SW
Aircraft: Piper PA-18 
Aircraft Damage: Substantial
Defining Event: Loss of control on ground 
Injuries: 1 None
Flight Conducted Under: Part 91: General aviation - Personal


The pilot in the tailwheel equipped airplane reported that while landing with a crosswind from the right, the airplane veered left. The pilot applied aft pressure to the control stick and brakes, but the airplane nosed over substantially damaging the rudder. The pilot reported that there were no preaccident mechanical malfunctions or failures 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 with a crosswind.


Aircraft Directional control - Not attained/maintained
Personnel issues Aircraft control - Pilot
Environmental issues Crosswind - Effect on equipment

Factual Information

History of Flight

Landing-flare/touchdown Loss of control on ground (Defining event)
Landing-landing roll Runway excursion
Landing-landing roll Nose over/nose down

Pilot Information

Certificate: Private 
Age: 59,Male
Airplane Rating(s): Single-engine land 
Seat Occupied: Front
Other Aircraft Rating(s): None 
Restraint Used: 4-point
Instrument Rating(s): None 
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed:
Medical Certification: Class 3 Without waivers/limitations
Last FAA Medical Exam: March 1, 2022
Occupational Pilot: No 
Last Flight Review or Equivalent: July 14, 2020
Flight Time: (Estimated) 1606 hours (Total, all aircraft), 823 hours (Total, this make and model), 1503 hours (Pilot In Command, all aircraft), 0.6 hours (Last 90 days, all aircraft), 0.6 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Piper 
Registration: N968SW
Model/Series: PA-18 
Aircraft Category: Airplane
Year of Manufacture: 1953 
Amateur Built:
Airworthiness Certificate: Unknown 
Serial Number: 18-1444
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: May 6, 2021 Annual
Certified Max Gross Wt.: 1500 lbs
Time Since Last Inspection: 34 Hr
s Engines: 1 Reciprocating
Airframe Total Time: 3044 Hrs at time of accident
Engine Manufacturer: Continental
ELT: C91 installed, not activated
Engine Model/Series: C-90-8F
Registered Owner: 
Rated Power: 90 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: KMAN,2537 ft msl 
Distance from Accident Site: 0 Nautical Miles
Observation Time: 15:15 Local 
Direction from Accident Site: 173°
Lowest Cloud Condition: Few / 9000 ft AGL 
Visibility: 10 miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: 7 knots / 
Turbulence Type Forecast/Actual: None / None
Wind Direction: 20° 
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.3 inches Hg
Temperature/Dew Point: 9°C / -7°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Nampa, ID 
Type of Flight Plan Filed: None
Destination: Nampa, ID
Type of Clearance: VFR
Departure Time: 
Type of Airspace: Class E

Airport Information

Airport: Nampa Municipal Airport KMAN 
Runway Surface Type: Asphalt
Airport Elevation: 2537 ft msl 
Runway Surface Condition: Dry
Runway Used: 11 
IFR Approach: None
Runway Length/Width: 5000 ft / 75 ft
VFR Approach/Landing: Full stop; Stop and go; Traffic pattern

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries:
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 43.581341,-116.52306 (est)

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