CHI98LA219

NTSB accident investigation · Piper PA-36-300 · Mobridge, SD · June 25, 1998

Accident · No injuriesLimited investigationFinal report
Date
June 25, 1998, 13:45 local (18:45 UTC)
Place
Mobridge, SD
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3760EPiper PA-36-300
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980625015029A
Case key
10933

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 failure to maintain clearance from the power lines. Factors associated with the accident were the power lines, and the separation of the vertical stabilizer and rudder which resulted in the pilot's inability to maintain directional control of the airplane.

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.

In flight collision with objectManeuvering - aerial application
Object - wire,transmissionFactor
Clearance - not maintainedPilot in commandCause
Vertical stabilizer - separationFactor
Flight control,rudder - separationFactor
Loss of control - in flightManeuvering - aerial application
Directional control - not possiblePilot in commandFactor
In flight collision with terrain/waterEmergency landing

Analysis

The pilot was spraying a field of wheat and was working under non-active power lines going to an abandoned farmstead. During one of the passes the airplane hit one of the wires separating the vertical stabilizer and rudder from the aircraft. The pilot stated that the directional control was lost, but the aircraft continued to fly, wings level, in a skidding turn to the right. Due to an approaching tree line the pilot reduced the engine power and the aircraft impacted level terrain with the wings level. The pilot stated that the aircraft slid to the left, folding the left main gear under the wing.

Factual narrative

On June 25, 1998, at 1345 central daylight time, a Piper PA-36-300, N3760E, piloted by a commercial pilot, sustained substantial damage when it collided with a power line, loss control and impacted the terrain near Mobridge, South Dakota. Visual meteorological conditions prevailed at the time of the accident and the flight was not operating on a flight plan. The pilot reported no injuries. The 14 CFR Part 137 aerial application flight was being operated by Mott Aerial Spray, Mobridge, South Dakota. The flight originated at the Mobridge Municipal Airport, near Mobridge, South Dakota, at 1315.

According to the pilot's written statement, he was spraying a field of wheat and was working under non-active power lines going to an abandoned farmstead. During one of the passes under the power lines the airplane hit one of the wires separating the vertical stabilizer from the aircraft along with the rudder. The pilot stated that the directional control was lost, but the aircraft continued to fly, wings level, in a skidding turn to the right. Due to an approaching tree line the pilot reduced the engine power and the aircraft impacted level terrain with the wings level. The pilot stated that the aircraft slid to the left, folding the left main gear under the wing.

Aircraft

Registration
N3760E
Reported as
Piper PA-36-300
Category
Airplane
Serial number
36--790064
Airframe hours
3,457
Engine
Lycoming IO-540-K1G5, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Robert A. Mott
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · June 1, 1997 · 248 hours before
Departed
MBG · Mobridge, SD

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
49
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
14,120 total · 3,629 in this make and model · 13,868 as pilot in command · 135 in the last 90 days · 90 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 59 °F
Altimeter
29.00 inHg
Observed at
MBG, 360 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.