DFW07CA098

NTSB accident investigation · Flagg Kitfox IV · Centerville, TX · April 28, 2007

Accident · No injuriesData collectionFinal report
Date
April 28, 2007, 18:00 local (23:00 UTC)
Place
Centerville, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N674FFlagg Kitfox IV
Weather
Visual (VMC) · Day
Status
Completed · report June 27, 2007
Report
Approved by Office Director
Parties
Houston, Texas
Case key
65656

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 loss of engine power due to the failure of the air induction ducting. A contributing factor was the lack of suitable terrain for the forced landing.

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(total) - mech failure/malfTakeoff - initial climb
Induction air ducting - failureCause
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - none suitableFactor
Object - tree(s)
Loss of control - in flightEmergency descent/landing

Analysis

The 80-horsepower engine on the single-engine experimental airplane lost power during the initial takeoff climb from runway 06. The 133-hour private pilot added that the engine began sputtering and running rough during the initial climb. The pilot added that he tried to pull the choke and alter the throttle settings in an attempt to regain engine power, to no avail. The pilot initiated a forced landing to a nearby clearing; however, the pilot did not have sufficient altitude and the airplane landed in trees. The airplane came to rest suspended in trees in a near vertical nose low attitude. The pilot was able to exit the airplane without injuries. Post-accident inspection of the engine revealed that the carburetor rubber flange coupler had failed, which resulted in the reported loss of engine power. The pilot added that the coupler (part number 267788) needs to have Kevlar material added in the injection mold process to prevent similar mishaps. The airplane sustained structural damage to both wings. The longeron and horizontal stabilizer were both bent. The airplane and engine were reported to have accumulated a total of 275-hours since new. The weather at the nearest weather reporting station located approximately 29 miles to the north north-east of the accident site reported calm winds, clear skies, and 20-statute mile visibility.

Factual narrative

The 80-horsepower engine on the single-engine experimental airplane lost power during the initial takeoff climb from runway 06. The 133-hour private pilot added that the engine began sputtering and running rough during the initial climb. The pilot added that he tried to pull the choke and alter the throttle settings in an attempt to regain engine power, to no avail. The pilot initiated a forced landing to a nearby clearing; however, the pilot did not have sufficient altitude and the airplane landed in trees. The airplane came to rest suspended in trees in a near vertical nose low attitude. The pilot was able to exit the airplane without injuries. Post-accident inspection of the engine revealed that the carburetor rubber flange coupler had failed, which resulted in the reported loss of engine power. The pilot added that the coupler (part number 267788) needs to have Kevlar material added in the injection mold process to prevent similar mishaps. The airplane sustained structural damage to both wings. The longeron and horizontal stabilizer were both bent. The airplane and engine were reported to have accumulated a total of 275-hours since new. The weather at the nearest weather reporting station located approximately 29 miles to the north north-east of the accident site reported calm winds, clear skies, and 20-statute mile visibility.

Aircraft

Registration
N674F
Reported as
Flagg Kitfox IV
Category
Airplane, amateur-built
Serial number
1674
Airframe hours
275
Engine
Rotax 912ul, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Marwynne Kuhn
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · July 1, 2006
Departed
TE01 · Centerville, TX
Destination
0TE4
Airport
TE01 · Dillard Ranch Airport, runway 06, 3,100 × 90 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
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
133 total · 3 in this make and model · 106 as pilot in command · 7 in the last 90 days · 7 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
20 statute miles
Lowest ceiling
None
Temperature
61 °F
Observed at
KPSN, 29 nm away