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Aviation safety reports, made easier to study

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April 17, 2022 · Cessna 170B · N2929D

Boise, ID

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 17, 2022
Injury Outcomes
No injuries (2 uninjured)
Location
Boise, ID
Aircraft
Cessna 170B (1956)
Tail Number
N2929D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR22LA155

The flight instructor reported that, the pilot receiving instruction performed a wheel landing in the tailwheel equipped airplane. During the landing roll, with the tailwheel still off the ground, the airplane drifted left, which was counteracted with right rudder control. Shortly after, the right wing suddenly lifted, and the airplane veered to the right. Despite left rudder input, the airplane ground looped to the right. During the ground loop, the left main landing gear axle bolts broke, and the left wing was substantially damaged when it struck the ground. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. He added that he felt the loss of control was due to a dust devil. At the time of the accident, the pilot was landing the airplane on runway 10R with wind from 180° at 4 knots.

NTSB Probable Cause

The pilot receiving instructions failure to maintain directional control during landing. Contributing to the accident was the flight instructor’s delayed remedial action.

Full Narrative

The flight instructor reported that, the pilot receiving instruction performed a wheel landing in the tailwheel equipped airplane. During the landing roll, with the tailwheel still off the ground, the airplane drifted left, which was counteracted with right rudder control. Shortly after, the right wing suddenly lifted, and the airplane veered to the right. Despite left rudder input, the airplane ground looped to the right. During the ground loop, the left main landing gear axle bolts broke, and the left wing was substantially damaged when it struck the ground. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. He added that he felt the loss of control was due to a dust devil. At the time of the accident, the pilot was landing the airplane on runway 10R with wind from 180° at 4 knots.

Flight

Event TypeAccident
Event Time10:45 PDT
Nearest AirportBoise Air Terminal (0nm N)
Runway10R
Runway Length9763 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 170B
Tail NumberN2929D
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360-M1B · Reciprocating · 180
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 63 · Second Class · None
Crew 2Age 50 · Third Class · None

Conditions

ConditionsVMC
LightDaylight
Wind180° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point46 F / 21 F
Altimeter30.29 inHg
Observation Time11:53
Weather SourceWFAC

Appendix: Source Data