SEA88LA009

NTSB accident investigation · Napper Vancraft · Pocatello, ID · October 17, 1987

Accident · No injuriesLimited investigationFinal report
Date
October 17, 1987, 13:00 local (19:00 UTC)
Place
Pocatello, ID
Injuries
1 uninjured
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N49694Napper Vancraft
Weather
Visual (VMC) · Day
Status
Completed · report December 27, 1988
Report
Approved by Office Director
FAA report
19871017059949A
Case key
40753

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/malfunctionManeuvering
Flight control,rudder - separationCause
Flt control syst,rudder control - disabledCause
Loss of control - in flightManeuvering
Spiral - uncontrolledPilot in command
Autorotation - performedPilot in command
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The experimental gyrocopter was on a test flight when the right rudder pedal pivot bolt broke. The aircraft began a spiral in a counter-clockwise direction with the rudder separating from the aircraft at the hinge points. The aircraft continued to spiral to the ground to impact.

Aircraft

Registration
N49694
Reported as
Napper Vancraft
Category
Airplane, amateur-built
Serial number
519489457
Airframe hours
9
Engine
Volkswagen 2200CC, 60 horsepower, reciprocating
Damage
Destroyed
Flight
Part 91
Registered owner
Paul R. Napper
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Continuous airworthiness · September 1, 1986
Airport
PIH · Pocatello Municipal

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
45
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
280 total · 17 in this make and model · 236 as pilot in command · 19 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 9 knots
Visibility
40 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 30 °F
Altimeter
30.00 inHg
Observed at
PIH, 2 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.