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NTSB Report
March 12, 2018 · Cessna 140 Undesignat · N2011N
Madison, SD
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
March 12, 2018
Injury Outcomes
No injuries (2 uninjured)
Location
Madison, SD
Aircraft
Cessna 140 Undesignat (1947)
Tail Number
N2011N
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA18CA166
The flight instructor, acting as a safety pilot, in the tailwheel-equipped airplane reported that, to expedite takeoff, he decided to take off from the grass runway instead of the concrete runway. He added that, about midway into the soft-field takeoff roll, he observed that the airplane was "struggling to build airspeed." He added that the runway had previously thawed and was "wet spongy sod." He reduced power and began to apply the brakes to abort the takeoff, but the airplane overran the runway, impacted a snow bank, and nosed over. The airplane sustained substantial damage to the fuselage. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
NTSB Probable Cause
The flight instructor’s delayed aborted takeoff on a soft, wet, grass runway, which resulted in a runway overrun.
Full Narrative
The flight instructor, acting as a safety pilot, in the tailwheel-equipped airplane reported that, to expedite takeoff, he decided to takeoff from the grass runway instead of the concrete runway. He added that, about midway into the soft-field takeoff roll, he observed that the airplane was "struggling to build airspeed". He added that the runway had previously thawed and was "wet spongy sod". He reduced power and began to apply the brakes to abort the takeoff, but the airplane overran the runway, impacted a snow bank, and nosed over. The airplane sustained substantial damage to the fuselage. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time17:15 CDT
Nearest AirportMadison Muni (0nm SSW)
Runway03
Runway Length2380 ft
Runway Width200 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 140 Undesignat
Tail NumberN2011N
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · C-85-12F · Reciprocating · 85
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 30 · First Class · None
Crew 2Unknown · None
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 6 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point32 C / 32 C
Altimeter30.36 inHg
Observation Time21:55
Weather SourceWFAC