CHI98LA217

NTSB accident investigation · Air Tractor AT-301 · Ipswich, SD · June 25, 1998

Accident · No injuriesLimited investigationFinal report
Date
June 25, 1998, 09:00 local (14:00 UTC)
Place
Ipswich, SD
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N31677Air Tractor AT-301
Weather
Visual (VMC) · Day
Status
Completed · report May 19, 1999
Report
Approved by Office Director
FAA report
19980625015019A
Case key
10931

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

On this page

Probable cause

the pilot's inadequate evaluation of the weather conditions and his failure to maintain aircraft control which resulted in a stall/mush. Factors associated with the accident were the tailwind condition and the soft terrain.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Weather condition - tailwindFactor
Weather evaluation - inadequatePilot in commandCause
Aircraft handling - not maintainedPilot in commandCause
Stall/mushCause
In flight collision with terrain/waterDescent - uncontrolled
Nose overOther
Terrain condition - softFactor

Analysis

The pilot reported that shortly after rotating during a takeoff to the north, a sudden gust of wind from the south was experienced. He reported the airplane stalled and then 'mushed.' The airplane traveled off the end of the runway into a wet oat field where the airplane nosed over. The pilot reported the local winds were from the west at 6 knots. The 0856 cdt weather observation for Aberdeen, South Dakota, 19 miles east of the accident site, reported the winds were from 230 degrees at 7 knots.

Factual narrative

On June 25, 1998, at 0900 central daylight time, an Air Tractor AT-301, N31677, operated by Tri County Ag Service, Inc., collided with the terrain and nosed over following a loss of control on takeoff from Rappe Field, a private airstrip, in Ipswich, South Dakota. The pilot was not injured. The airplane was substantially damaged. The 14 CFR Part 137 aerial application flight was operating in visual meteorological conditions without a flight plan. The flight was originating at the time of the accident.

The airplane was taking off to the north when the accident occurred. The pilot reported that during the initial takeoff climb, shortly after rotation, a sudden gust of wind from the south was experienced. He reported the airplane stalled and then "mushed." The airplane traveled off the end of the runway into a wet oat field where the airplane nosed over.

The pilot reported the local winds were from the west at 6 knots. The 0856 cdt weather observation for Aberdeen, South Dakota, 19 miles east of the accident site, reported the winds were from 230 degrees at 7 knots.

Aircraft

Registration
N31677
Reported as
Air Tractor AT-301
Category
Airplane
Serial number
570
Engine
P&W R-1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Tri County Ag Service, Inc.
Last inspection
Annual · November 24, 1998
Departed
PVT
Airport
SD25 · Rappe Field, runway 36, 2,600 × 60 ft, grass/turf

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
34
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
2,150 total · 1,100 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 61 °F
Altimeter
29.00 inHg
Observed at
ABR, 19 nm away

FAA reports on this event · 1

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