GAA16CA023

NTSB accident investigation · Cessna 140 · Fort Benton, MT · October 20, 2015

Accident · Serious injuriesData collectionFinal report
Date
October 20, 2015, 17:50 local (23:50 UTC)
Place
Fort Benton, MT
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N76001Cessna 140
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed · report February 8, 2016
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FEDERAL AVIATION ADMINISTRATION
Case key
92210

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

A hard landing which resulted in a loss of directional control, main landing gear collapse, and damage to the left wing spar.

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: descent rateAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 140: 2 casesAll aircraft: 242 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 140: 56 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 140: 27 casesAll aircraft: 3,958 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 140: 5 casesAll aircraft: 594 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 he landed with a 5 to 8 knot tailwind and landed hard. The pilot lost directional control of the airplane and side loaded the landing gear which caused the left main landing gear to collapse and the left wing impacted the runway. The airplane sustained substantial damage to the left wing spar. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that he landed with a 5 to 8 knot tailwind and landed hard. The pilot lost directional control of the airplane and side loaded the landing gear which caused the left main landing gear to collapse and the left wing impacted the runway. The airplane sustained substantial damage to the left wing spar. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N76001
Reported as
Cessna 140
Category
Airplane
Serial number
10395
Built
1946
Airframe hours
1,556
Engine
Lycoming O-290-D, 125 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 22, 2008
Departed
79S · Fort Benton, MT
Destination
79S · Fort Benton, MT
Airport
79S · Fort Benton, runway 23, 4,300 × 75 ft, asphalt

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
79
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Seat
Left
Flight hours
1,538 total · 1,538 in this make and model · 1,538 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 3 knots
Visibility
10 statute miles
Lowest ceiling
8,000 ft broken
Temperature
55 °F, dew point 43 °F
Altimeter
29.79 inHg
Observed at
KGFA, 30 nm away

Docket · 2

The files NTSB released with the investigation on January 20, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 MB in all.

Other investigations on N76001 · 1

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