CHI00LA105

NTSB accident investigation · Weinzierl Titan Tornado II · Maple Plain, MN · April 2, 2000

Accident · Minor injuriesLimited investigationFinal report
Date
April 2, 2000, 10:26 local (15:26 UTC)
Place
Maple Plain, MN
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N196KWWeinzierl Titan Tornado II
Weather
Visual (VMC) · Day
Status
Completed · report May 17, 2001
Report
Approved by Office Director
FAA report
20000402006339A
Case key
48897

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

the obstructed fuel system filter, the inadequate silicone material the builder used, and the rough and uneven terrain. A factor was that suitable landing terrain was not available.

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 powerTakeoff
Fuel system,filter - obstructedCause
Material inadequate,improperOwner/builderCause
Forced landingEmergency descent/landing
On ground/water encounter with terrain/waterEmergency landing
Terrain condition - rough/unevenCause
Terrain condition - none suitableFactor

Analysis

The airplane sustained substantial damage on contact with terrain during a forced landing after a loss of engine power on takeoff. The pilot and passenger sustained minor injuries. The pilot stated, 'I was departing to the east. I climed to about 200 ft. when the engine stoped I turned back for a field. I hit the field and the plane overturned.' The field was rough and uneven. The airplane sustained substantial damage to the hull, wing tips, and tail. The engines fuel filter was found clogged with silicone used as a fuel tank sealant. The plugged filter was a sintered bronze filter. The Rotax installation manual states, 'A suitable fuel filter of 0.15 mm mesh size must be fitted between pump and carburetor. Do not use paper filters. The fuel tank must have a drain cock for condensed water. A screen of 0.3 mm mesh size should be fitted to the fuel line in the tank.' The pilot's safety recommendation was, 'Don't use silicone to seal any type of fuel tanks or exc.'

Factual narrative

On April 2, 2000, at 1026 central daylight time, a Weinzierl Titan Tornado II, piloted by a private pilot sustained substantial damage on contact with terrain during a forced landing after a loss of engine power on takeoff from Maple Airport, near Maple Plain, Minnesota. The local flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. The pilot and passenger sustained minor injuries. No flight plan was on file. The personal flight was originating at the time of the accident.

The pilot stated, "I was departing to the east. I climed to about 200 ft. when the engine stoped I turned back for a field." The airport owner stated that the field was rough and uneven. He stated, "I hit the field and the plane overturned." He further stated that the airplane sustained substantial damage to the hull, wing tips, and tail.

The pilot examined the wreckage and found a clogged fuel filter. The fuel filter was plugged with silicone used as a sealant in the fuel tank. See appended photo.

The plugged filter was identified as a Plastisonics, Inc., sintered bronze, model FF704C series filter. The fuel filter was designed for 1/4-inch fuel lines. See appended filter specification sheet.

The Rotax installation manual states, "A suitable fuel filter of 0.15 mm mesh size must be fitted between pump and carburetor. Do not use paper filters. The fuel tank must have a drain cock for condensed water. A screen of 0.3 mm mesh size should be fitted to the fuel line in the tank." See appended installation manual.

The pilot's safety recommendation was, "Don't use silicone to seal any type of fuel tanks or exc."

Aircraft

Registration
N196KW
Reported as
Weinzierl Titan Tornado II (TITAN TORN)
Category
Airplane, amateur-built
Serial number
D96618SOK020
Engine
Rotax, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Kevin Leon Weinzierl
Airworthiness certificate
Special, Experimental (Special)
Departed
MN69 · MN
Airport
MN69 · Maple Airport

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
33
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
490 total · 325 in this make and model · 38 in the last 90 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 12 knots
Visibility
10 statute miles
Lowest ceiling
11,000 ft broken
Temperature
55 °F, dew point 34 °F
Altimeter
29.00 inHg
Observed at
MSP, 21 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.