SEA87LA107

NTSB accident investigation · Aerodynamics . Hawk Mkii · Ellensburg, WA · June 1, 1987

Accident · No injuriesLimited investigationFinal report
Date
May 31, 1987, 20:10 local (Jun 1, 1987, 03:10 UTC)
Place
Ellensburg, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N5832MAerodynamics . Hawk Mkii
Weather
Visual (VMC) · Day
Status
Completed · report May 2, 1988
Report
Approved by Office Director
FAA report
19870531080669A
Case key
40633

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.

In flight encounter with weatherCruise
Weather condition - mountain waveFactor
Flight into known adverse weather - selectedPilot in commandCause
Weather condition - turbulenceFactor
Unsafe/hazardous condition warning - disregardedPilot in commandCause
Airframe/component/system failure/malfunctionCruise
Design stress limits of aircraft - exceededPilot in commandFactor
Forced landingDescent - emergency
Precautionary landing - performedPilot in command

Analysis

Despite warnings from the flight service station about turbulence, high winds aloft, severe low level wind shear, and low ceilings along the pilots intended route of flight, the pilot elected to depart the airport for his destination. Standing lenticular altocumulus clouds were also present. Within 1/2 hour of departure the aircraft encountered severe turbulence causing structural damage to the aircraft. The pilot was able to land the aircraft safely at a nearby airport.

Aircraft

Registration
N5832M
Reported as
Aerodynamics . Hawk Mkii
Category
Airplane, amateur-built
Serial number
8411-2
Airframe hours
200
Engine
Rotax 532, 48 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Rod Pederson
Registered owner
Rod Pederson
Airworthiness certificate
Special, Experimental (Special)
Departed
EAT · Wenatchee, WA
Destination
S88 · Arlington, WA
Flight plan
VFR

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
37
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine sea, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
6,500 total · 100 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 14 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 36 °F
Altimeter
29.00 inHg
Observed at
EAT, 15 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.