CEN14CA368

NTSB accident investigation · Mckenzie Douglas E Stol CH750 · Dodgeville, MI · July 13, 2014

Accident · Minor injuriesData collectionFinal report
Date
July 13, 2014, 16:30 local (20:30 UTC)
Place
Dodgeville, MI
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N792MCMckenzie Douglas E Stol CH750
Defining event
Takeoff: Loss of visual reference
Weather
Visual (VMC) · Day
Status
Completed · report October 20, 2014
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA Grand Rapids FSDO
FAA report
20140713012359A
Case key
89673

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 pilot's failure to maintain control of the airplane during takeoff resulting in an impact with a tree and terrain.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedDouglas E Mckenzie ZENITH STOL CH750: 1 caseAll aircraft: 1,269 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationDouglas E Mckenzie ZENITH STOL CH750: 1 caseAll aircraft: 1,008 cases
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeDouglas E Mckenzie ZENITH STOL CH750: 1 caseAll aircraft: 933 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he was performing a normal takeoff in the short take-off and landing (STOL) airplane on a short narrow grass runway. After the airplane became airborne about midfield it encountered unexpected crosswind turbulence near the edge of a tree line. The airplane drifted to the side, contacted the top of a tree, entered an aerodynamic stall, impacted terrain and came to rest on its nose resulting in substantial damage to the engine mount, forward fuselage, both wings, and both flaperons. The pilot credited the shoulder harness installation with saving him from more serious injury. The pilot also reported that there was no preimpact malfunction or failure.

Factual narrative

The pilot reported that he was performing a normal takeoff in the short take-off and landing (STOL) airplane on a short narrow grass runway. After the airplane became airborne about midfield it encountered unexpected crosswind turbulence near the edge of a tree line. The airplane drifted to the side, contacted the top of a tree, entered an aerodynamic stall, impacted terrain and came to rest on its nose resulting in substantial damage to the engine mount, forward fuselage, both wings, and both flaperons. The pilot credited the shoulder harness installation with saving him from more serious injury. The pilot also reported that there was no preimpact malfunction or failure.

Aircraft

Registration
N792MC
Reported as
Mckenzie Douglas E Stol CH750
Category
Airplane, amateur-built
Serial number
75-8144
Built
2012
Airframe hours
93
Engine
Jabiru 3300A, 120 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · October 4, 2013 · 19 hours before
Departed
CMX · Houghton, MI
Destination
NONE · Dodgeville, MI
Airport
NONE · McKenzie Highland Stables, runway 10, 800 × 50 ft, grass/turf

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
59
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine sea
Medical
Class 3, With waivers/limitations
Last flight review
July 13, 2013
Seat
Left
Restraint
3-point
Flight hours
2,090 total · 94 in this make and model · 2,057 as pilot in command · 15 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 17 knots, gusting 31
Visibility
10 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 45 °F
Altimeter
29.79 inHg
Observed at
KCMX, 9 nm away

Docket · 2

The files NTSB released with the investigation on October 9, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 MB in all.

FAA reports on this event · 1

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