CHI98LA271

NTSB accident investigation · Vollmers Sonerai II L · Lincoln, ND · July 11, 1998

Accident · Minor injuriesLimited investigationFinal report
Date
July 11, 1998, 09:25 local (14:25 UTC)
Place
Lincoln, ND
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N317WMVollmers Sonerai II L
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980711016459A
Case key
43656

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

Loss of engine power due to a corroded ignition wire. Related factors were the tailwind, and ditch.

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 powerDescent - normal
Ignition system,low tension wiring - corrodedCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ditchFactor
Weather condition - tailwindFactor

Analysis

The pilot said that the engine suffered a total loss of power and he initiated a forced landing to a dirt road. On approach to the road he realized that the landing would have a tailwind. He then attempted to turn the airplane more into the wind; however, he temporarily lost control. Coincident with his recovery of control of the airplane, the landing was made in a ditch. During the rollout, the airplane nosed over. A subsequent examination of the engine revealed a corroded wire in the electronic (automotive) ignition system of the amateur built airplane.

Factual narrative

On July 11, 1998, at 0925 central daylight time, a Vollmers Sonerai II L (amateur built airplane), N317WM, impacted the terrain during a forced landing after loss of engine power. The private pilot received minor injuries and the airplane sustained substantial damage. The pilot stated he was descending to land at Bismarck Municipal Airport when the airplane lost power. The airplane was being operated as a personal flight under 14 CFR Part 91 when the accident occurred. Visual meteorological conditions prevailed at the time and no flight plan was filed. The flight originated in Jamestown, North Dakota at 0845.

The pilot said that he did not know why the engine lost power. He said in his written statement that after the loss of power, he attempted to land on a dirt road landing to the north; however found the wind to be from the south. He attempted to make a low level turn to land more into the wind, but temporarily lost control of the airplane. When he regained control the airplane touched down in a ditch and after rolling a "few hundred feet," nosed over.

An examination of the engine subsequent to the accident revealed a corroded wire in the electronic ignition system. There was no spark available to the spark plugs. The ignition system on the engine was an automotive installation on this amateur built airplane.

Aircraft

Registration
N317WM
Reported as
Vollmers Sonerai II L (SONERAI II)
Category
Airplane, amateur-built
Serial number
559
Airframe hours
107
Engine
Volkswagen 82-2-DEH, 75 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Karl W. Vollmers
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · July 9, 1998 · 2 hours before
Departed
JMS · Jamestown, ND
Destination
BIS · Bismarck, ND

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
64
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
1,565 total · 108 in this make and model · 1,535 as pilot in command · 54 in the last 90 days · 27 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 14 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 70 °F
Altimeter
29.00 inHg
Observed at
BIS, 3 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.