MKC90LA081

NTSB accident investigation · Air Tractor AT-401 · Hornersville, MO · April 5, 1990

Accident · No injuriesLimited investigationFinal report
Date
April 5, 1990, 13:00 local (18:00 UTC)
Place
Hornersville, MO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N1015AAir Tractor AT-401
Weather
Visual (VMC) · Day
Status
Completed · report March 5, 1993
Report
Approved by Office Director
FAA report
19900405007739A
Case key
34957

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

Failure of an engine cylinder.

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 engine power(total) - mech failure/malfTakeoff - initial climb
Engine assembly,cylinder - failure,totalCause
Forced landingDescent - emergency
Nose overLanding
Terrain condition - none suitableFactor
Terrain condition - softFactor
Terrain condition - wetFactor

Analysis

The pilot said that shortly after takeoff, during an aerial application operation, the engine failed. An emergency landing was made in a soft, muddy farm field, resulting in a nose over and substantial damage to the acft. A post-accident investigation revealed the #9 cylinder on the powerplant had failed.

Aircraft

Registration
N1015A
Reported as
Air Tractor AT-401
Category
Airplane
Serial number
401-0735
Airframe hours
57
Engine
P&W R-1340-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Simonton & Winborn
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · September 27, 1989 · 57 hours before
Departed
37M · Hornersville, MO
Airport
37M · Hornersville, runway 18, 2,640 × 50 ft, dirt

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
44
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
3,750 total · 150 in this make and model · 3,650 as pilot in command · 130 in the last 90 days · 110 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point -0 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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