SEA94LA136

NTSB accident investigation · Ayres S2R · Burley, ID · June 2, 1994

Accident · No injuriesLimited investigationFinal report
Date
June 2, 1994, 15:30 local (21:30 UTC)
Place
Burley, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8542Ayres S2R
Weather
Visual (VMC) · Day
Status
Completed · report March 27, 1995
Report
Approved by Office Director
FAA report
19940602013419A
Case key
41939

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

A loose carburetor. Factors include no suitable terrain for making a forced landing, and trees in the field where the forced landing took place.

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/malfManeuvering
Fuel system,carburetor - looseCause
Forced landingDescent - emergency
On ground/water collision with objectLanding - roll
Terrain condition - none suitableFactor
Object - tree(s)Factor

Analysis

Just as the aerial application pilot was completing a spray run, the engine lost power. There was no suitable landing site available, and the pilot executed a forced landing in a nearby field. During the landing roll, the aircraft impacted a tree line that ran across the field. It was later discovered that the carburetor mounting bolts had come loose, allowing the fuel mixture to become too lean.

Factual narrative

On June 2, 1994, approximately 1530 mountain daylight time (MDT), an Ayres S2R, N8542, impacted trees during a forced landing seven miles east of Burley, Idaho. The commercial pilot, who was the sole occupant of the airplane, received no injuries, but the aircraft sustained substantial damage. The agricultural application flight, which departed a county road approximately 1430 MDT, was in visual meteorological conditions at the time of the accident. No flight plan had been filed, and there was no report of an ELT activation.

The pilot said that the engine lost power as he started a pull-up from an application run. He executed a forced landing in an adjacent field, and impacted a line of trees during the landing roll.

It was later discovered that the carburetor mounting bolts were loose, and the carburetor was not firmly seated against its mounting flange.

Aircraft

Registration
N8542
Reported as
Ayres S2R
Category
Airplane
Serial number
R-1820-0012
Airframe hours
2,200
Engine
Wright R-1820-71, 1,200 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Bates, Bruce E.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · September 30, 1993 · 150 hours before
Departed
County Road, ID
Destination
ID

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
43
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
14,421 total · 511 in this make and model · 150 in the last 90 days · 90 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 3 knots
Visibility
25 statute miles
Lowest ceiling
None
Temperature
91 °F

FAA reports on this event · 1

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