SEA98LA103

NTSB accident investigation · Casa BU-131 · Harrisburg, OR · June 17, 1998

Accident · No injuriesLimited investigationFinal report
Date
June 17, 1998, 11:00 local (18:00 UTC)
Place
Harrisburg, OR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1XWCasa BU-131
Weather
Visual (VMC) · Day
Status
Completed · report February 11, 2000
Report
Approved by Office Director
FAA report
19980617013989A
Case key
42803

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 failed bracket attaching the throttle linkage, which resulted in the inability to control power, and unsuitable terrain for a successful forced landing. Factors include soft terrain with high vegetation.

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(partial) - mech failure/malfDescent
Throttle/power lever,linkage - disconnectedCause
Forced landingDescent - emergency
Nose downEmergency landing
Terrain condition - high vegetationFactor
Terrain condition - softFactor
Terrain condition - none suitableCause

Analysis

The pilot stated that he throttled back to descend. At about 1500 feet, he opened the throttle and got no response; the engine remained at idle. At 1000 feet, he was committed to land and chose a 40 acre field rather than attempt a landing on the highway. He was down and rolling when the airplane nosed over in soft terrain and tall rye grass. FAA inspectors determined that a bracket attaching the throttle linkage broke, causing the pilot to be unable to modulate engine power. The airplane nosed over, damaging the upper wing and vertical fin.

Factual narrative

On June 17, 1998, approximately 1100 Pacific daylight time, a CASA BU-131 sustained substantial damage during a forced landing near Harrisburg, Oregon, after a loss of power while en route from Hillsboro, Oregon, to Cottage Grove, Oregon. The private pilot and his passenger were uninjured. Visual meteorological conditions prevailed at the time of the accident. There was no report of an ELT activating.

The pilot stated that he throttled back to descend. At about 1500 feet, he opened the throttle and got no response; the engine remained at idle. At 1000 feet, he was committed to land and chose a 40 acre field rather than attempt a landing on the highway. He was down and rolling when the airplane nosed over in soft terrain and tall rye grass.

FAA inspectors determined that a bracket attaching the throttle linkage broke, causing the pilot to be unable to modulate engine power. The airplane nosed over, damaging the upper wing and vertical fin.

Aircraft

Registration
N1XW
Reported as
Casa BU-131
Category
Airplane
Serial number
628
Engine
Emsa TIGRE, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert R. Mcausland
Airworthiness certificate
Special, Experimental (Special)
Departed
HIO · Hillsboro, OR
Destination
61S · Cottage Grove, OR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
69
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
2,823 total · 400 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
10° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 43 °F
Altimeter
30.00 inHg
Observed at
CV

FAA reports on this event · 1

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