CHI87DEP09

NTSB accident investigation · Ayres 600S-2D · Bancroft, WI · July 20, 1987

Accident · No injuriesFinal report
Date
July 20, 1987, 09:00 local (14:00 UTC)
Place
Bancroft, WI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N4436FAyres 600S-2D
Weather
Visual (VMC) · Day
Status
Completed · report May 16, 1989
Report
Approved by Office Director
FAA report
19870720035529A
Case key
13580

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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.

Airframe/component/system failure/malfunctionLanding - flare/touchdown
Landing gear,wheel - lockedCause
Maintenance,inspection - inadequateCompany maintenance personnelCause
Loss of control - on ground/waterLanding - roll
Directional control - not possible
On ground/water collision with objectLanding - roll
Object - fence postFactor

Analysis

On landing the aircraft veered to the right. Application of left brake and rudder did not arrest the turn. The aircraft impacted a fence post rendering substantial damage to the aircraft. Subsequent investigation revealed an axle spacer on the right wheel was worn beyond limits. This prevented the wheel from turning.

Aircraft

Registration
N4436F
Reported as
Ayres 600S-2D
Category
Airplane
Serial number
1386D
Airframe hours
9,646
Engine
P&W R-1340-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Farmers Flying Service, doing business as Farmers Flying Service, Inc.
Registered owner
Farmer'S Flying Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · June 18, 1987 · 52 hours before
Airport
12 · Bancroft International, runway 17, 2,600 × 18 ft, asphalt

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
54
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
19,610 total · 2,000 in this make and model · 19,460 as pilot in command · 50 in the last 90 days · 6 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 7 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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