CHI05LA113

NTSB accident investigation · Mattson Zenith 601XL · Dike, IA · May 10, 2005

Accident · No injuriesLimited investigationFinal report
Date
May 10, 2005, 17:37 local (22:37 UTC)
Place
Dike, IA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N824MMattson Zenith 601XL
Weather
Visual (VMC) · Day
Status
Completed · report September 13, 2005
Report
Approved by Office Director
Parties
FAA
FAA report
20050510007759A
Case key
61475

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 loss of engine power for undetermined reasons and the pilot misjudged the forced landing approach. Factors associated with the accident were the fence and the ditch which the airplane contacted.

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 powerCruise - normal
Reason for occurrence undeterminedCause
Forced landingDescent - emergency
On ground/water collision with objectLanding - roll
Planned approach - misjudgedPilot in commandCause
Object - fenceFactor
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ditchFactor

Analysis

The airplane collided with a ditch during an off airport forced following a loss of engine power. The pilot reported that 15 minutes into the flight, the engine rpm started decreasing and he thought he smelled smoke in the cockpit. He reported that he turned off the battery switches and the engine rpm began to increase. The pilot reported he set the engine power to 2,500 rpm and began spiraling down over a private airstrip from an altitude of 4,500 feet above mean sea level (msl) when the engine lost all power. He stated he needed additional power to complete the last 360 degree turn so he elected to land in a field. The airplane struck a fence and a ditch during the landing. Inspection of the airplane and engine failed to reveal any mechanical failure/malfunction which would have resulted in a fire, smoke, or the loss of engine power. The engine was equipped with an electronic ignition system. The pilot reported the accident could have been avoided by making a "better landing on power off."

Factual narrative

On May 10, 2005, at 1737 central daylight time, an experiemental, amatuer-built Mattson Zenith 601XL, N824M, collided with a ditch during an off airport forced landing in Dike, Iowa, following a loss of engine power. The private pilot was not injured. The airplane was substantially damaged. The 14 CFR Part 91 personal flight was operating in visual meteorological conditions without a flight plan. The local flight originated from Waterloo, Iowa, at 1700.

The pilot reported that 15 minutes into the flight, the engine rpm started decreasing and he thought he smelled smoke in the cockpit. He reported that he turned off the battery switches and the engine rpm began to increase. The pilot reported he set the engine power to 2,500 rpm and began spiraling down over a private airstrip from an altitude of 4,500 feet above mean sea level (msl) when the engine lost all power. He stated he needed additional power to complete the last 360 degree turn so he elected to land in a field. The airplane struck a fence and a ditch during the landing.

Inspection of the airplane and engine by an inspector from the Federal Aviation Administration Flight Standards District Office in Des Moines, Iowa, failed to reveal any mechanical failure/malfunction which would have resulted in a fire, smoke, or the loss of engine power. The engine was equipped with an electronic ignition system.

The pilot reported the accident could have been avoided by making a "better landing on power off."

Aircraft

Registration
N824M
Reported as
Mattson Zenith 601XL
Category
Airplane, amateur-built
Serial number
6-4466
Airframe hours
24
Engine
Honda CAM 100, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Douglas L. Mattson
Airworthiness certificate
Special, Experimental (Special)
Last inspection
January 1, 2005
Departed
ALO · Waterloo, IA
Destination
ALO
Airport
PVT · Private

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
53
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
April 1, 2005
Seat
Left
Flight hours
123 total · 22 in this make and model · 87 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 52 °F
Altimeter
29.82 inHg
Observed at
ALO, 13 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.