GAA17CA204

NTSB accident investigation · Cessna 170 · Death Valley, CA · March 26, 2017

Accident · Minor injuriesData collectionFinal report
Date
March 25, 2017, 18:06 local (Mar 26, 2017, 01:06 UTC)
Place
Death Valley, CA
Injuries
2 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9953ACessna 170
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report May 15, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20170325003299A
Case key
94914

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot’s improper compensation for crosswind conditions during the landing flare and his subsequent failure to maintain directional control during the landing.

Findings · 5

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 170A: 33 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 170A: 23 casesAll aircraft: 3,958 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Response/compensationCessna 170A: 9 casesAll aircraft: 1,199 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Response/compensationCessna 170A: 11 casesAll aircraft: 1,008 casesProbable cause
Runway/land/takeoff/taxi surface: soft surfaceEnvironmental issues › Physical environment · Contributed to outcomeCessna 170A: 1 caseAll aircraft: 264 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot of the tailwheel-equipped airplane reported that, during landing on a backcountry dirt airstrip in a crosswind, the airplane touched down and bounced. He added that he attempted to maintain directional control, but a "[wind] gust weathervaned the aircraft nose left," and the right main landing gear wheel dug into the ground during the second touchdown. Subsequently, the airplane ground looped to the left, and the right wing impacted the ground. The airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that during landing on a backcountry dirt airstrip in a crosswind, the airplane touched down and bounced. He added that he attempted to maintain directional control, but a "[wind] gust weathervaned the aircraft nose left" and the right main landing gear wheel dug into the ground during the second touchdown. Subsequently, the airplane ground looped to the left and the right wing impacted the ground. The airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N9953A
Reported as
Cessna 170 (A)
Category
Airplane
Serial number
19313
Built
1950
Airframe hours
4,841.1
Engine
Cont Motor O-300A, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 2016
Departed
L00 · Rosamond, CA
Destination
Death Valley, CA
Equipment
None

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
36
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
September 27, 2015
Seat
Right
Restraint
3-point
Flight hours
971 total · 404 in this make and model · 894 as pilot in command · 8 in the last 90 days · 6 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 12 °F
Altimeter
29.93 inHg
Observed at
KBIH, 44 nm away

Docket · 2

The files NTSB released with the investigation on April 20, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 424 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.