SEA08CA113

NTSB accident investigation · Air Tractor AT-502 · Waitsburg, WA · April 27, 2008

Accident · No injuriesData collectionFinal report
Date
April 27, 2008, 08:30 local (15:30 UTC)
Place
Waitsburg, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N1519UAir Tractor AT-502
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report June 30, 2008
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20080427832069A
Case key
67894

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 terrain while maneuvering at low altitude. Contributing to the accident was the rising terrain.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Terrain: mountainous/hilly terrainEnvironmental issues › Physical environment · Not specifiedAir Tractor AT-502: 1 caseAll aircraft: 329 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-502: 7 casesAll aircraft: 1,310 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

After arriving at the steep hillside field to which he was going to apply chemicals, the pilot maneuvered at low level over the field in an attempt to determine the best pattern to fly to accomplish the job. During that process he inadvertently allowed the airplane to get into a position from which it was not able to climb over the rising terrain. Although he dumped his chemical load and leveled the airplanes wings, the airplane impacted the terrain about 75 feet below the top of a ridge.

Factual narrative

After arriving at the steep hillside field to which he was going to apply chemicals, the pilot maneuvered at low level over the field in an attempt to determine the best pattern to fly to accomplish the job. During that process he inadvertently allowed himself to get in a position from which the airplane was not able to climb over the rising terrain. Although he dumped his chemical load and leveled the airplane's wings, the airplane impacted the terrain about 75 feet below the top of a ridge.

Aircraft

Registration
N1519U
Reported as
Air Tractor AT-502
Category
Airplane
Serial number
502-0154
Engine
Pratt & Whitney Canada PT6-15, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Gregory M. Beck
Airworthiness certificate
Special, Restricted (Special)
Departed
Waitsburg, WA

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
60
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2
Flight hours
17,900 total · 500 in this make and model · 65 in the last 90 days · 65 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
45 °F

FAA reports on this event · 1

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

Other investigations on N1519U · 1

Matched to the same aircraft by N-number and date.