GAA18CA100

NTSB accident investigation · Cessna 170 · Auburn, NY · January 11, 2018

Accident · No injuriesData collectionFinal report
Date
January 11, 2018, 11:00 local (16:00 UTC)
Place
Auburn, NY
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N1997CCessna 170
Defining event
Taxi-from runway: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report April 23, 2018
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180111000749A
Case key
96599

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 wind correction inputs while taxiing with a quartering tailwind.

Findings · 4

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.

Performance/control parameters: crosswind correctionAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 170B: 2 casesAll aircraft: 184 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 170B: 12 casesAll aircraft: 594 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 170B: 13 casesAll aircraft: 1,199 cases
Runway/land/takeoff/taxi surface: soft surfaceEnvironmental issues › Physical environment · Effect on operationCessna 170B: 4 casesAll 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 taxi after landing, he initially applied forward and right yoke inputs because of the tailwind but transitioned to back and left yoke inputs because the runway was soft and wet. He added that the airplane encountered a left quartering tailwind gust and spun into an adjacent soy bean field. The pilot exited the airplane to examine the damage, at which point another wind gust flipped the airplane inverted. The pilot reported that, after he exited the airplane, he observed windshield damage before the second wind gust occurred. The airplane sustained substantial damage to the windshield. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot reported that the wind was from the southwest between 8 and 15 knots. The airplane was taxiing north. The Federal Aviation Administration's Airplane Flying Handbook, FAA-H-8083-3B, contained a section titled "Taxiing," which stated the following: When taxiing with a quartering tailwind, the elevator should be held in the DOWN position, and the upwind aileron, DOWN. Since the wind is striking the airplane from behind, these control positions reduce the tendency of the wind to get under the tail and the wing and to nose the airplane over. The application of these crosswind taxi corrections helps to minimize the weathervaning tendency and ultimately results in making the airplane easier to steer.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that, during taxi after landing, he initially applied forward and right yoke inputs because of the tailwind, but transitioned to back and left yoke inputs because the runway was soft and wet. He added that the airplane encountered a left quartering tailwind gust and spun into an adjacent soy bean field. The pilot exited the airplane to examine the damage, when another gust of wind flipped the airplane inverted. The pilot reported that, after he exited the airplane, he observed windshield damage prior to the second wind gust. The airplane sustained substantial damage to the windshield. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot reported that the wind was from the southwest at 8 to 15 knots. The airplane was taxiing north. Federal Aviation Administration's Airplane Flying Handbook, FAA-H-8083-3B, contains a section titled "Taxiing" which states: When taxiing with a quartering tailwind, the elevator should be held in the DOWN position, and the upwind aileron, DOWN. Since the wind is striking the airplane from behind, these control positions reduce the tendency of the wind to get under the tail and the wing and to nose the airplane over. The application of these crosswind taxi corrections helps to minimize the weathervaning tendency and ultimately results in making the airplane easier to steer.

Aircraft

Registration
N1997C
Reported as
Cessna 170 (B)
Category
Airplane
Serial number
26142
Built
1954
Airframe hours
2,056.9
Engine
Cont Motor C145 SERIES, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 17, 2017
Departed
6B9 · Skaneateles, NY
Destination
06NY · Auburn, NY
Flight plan
VFR
Airport
06NY · Murphy Field
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
63
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
December 1, 2016
Seat
Left
Flight hours
5,215 total · 82 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 11 knots
Visibility
10 statute miles
Temperature
46 °F, dew point 36 °F
Altimeter
30.20 inHg
Observed at
KITH, 22 nm away

Docket · 3

The files NTSB released with the investigation on March 20, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 MB 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.

Other investigations on N1997C · 1

Matched to the same aircraft by N-number and date.