DEN89DTI01

NTSB accident investigation · Piper PA-25-235 · Conrad, MT · June 20, 1989

Accident · FatalFinal report
Date
June 20, 1989, 06:30 local (12:30 UTC)
Place
Conrad, MT
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N7001ZPiper PA-25-235
Weather
Visual (VMC) · Day
Status
Completed · report August 22, 1990
Report
Approved by Office Director
FAA report
19890620016259A
Case key
17555

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 see the guy wire in time to avoid colliding with it.

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 - guy wireFactor
Visual lookout - inadequatePilot in commandCause
Clearance - not maintainedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot was applying herbicide on wheat. He was working alone and there were no witnesses to the accident. Examination of the accident site revealed that the aircraft collided with a guy wire supporting a powerline tower. The left wing tip hit the guy wire as the aircraft passed under the wire and the right wing collided with the ground 30 ft beyond the wire. The weather and sun glare were not considered factors in the accident.

Aircraft

Registration
N7001Z
Reported as
Piper PA-25-235
Category
Airplane
Serial number
25-2753
Airframe hours
2,428
Engine
Lycoming O-540-B2B5, 235 horsepower, reciprocating
Damage
Destroyed
Flight
Aerial application · Part 137
Operator
Mellott, Thomas H.
Registered owner
Mellott, Thomas H
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 13, 1989 · 100 hours before
Departed
S01 · Conrad, MT

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
48
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Toxicology
Performed
Flight hours
3,850 total · 1,400 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 32 knots, gusting 48
Visibility
50 statute miles
Lowest ceiling
20,000 ft broken
Temperature
63 °F
Altimeter
29.00 inHg
Observed at
CTB, 29 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.