DEN08LA109

NTSB accident investigation · Flight Design Ctsw · Von Ormy, TX · June 21, 2008

Accident · No injuriesLimited investigationFinal report
Date
June 21, 2008, 16:13 local (21:13 UTC)
Place
Von Ormy, TX
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N460CTFlight Design Ctsw
Defining event
Enroute-cruise: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report September 26, 2008
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20080621841689A
Case key
68277

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's inadequate in-flight decision by failing to refuel while en route, resulting in fuel exhaustion. Contributing to the accident were a proper touchdown point was not possible and the inadequate display of the fuel quantity indicator.

Findings · 6

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.

Action: lack of actionPersonnel issues › Action/decision · PilotFlight Design CTSW: 3 casesAll aircraft: 792 casesProbable cause
Physical workspace: controls and displaysEnvironmental issues › Task environment · Contributed to outcomeFlight Design CTSW: 1 caseAll aircraft: 5 casesProbable cause
Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Not specifiedFlight Design CTSW: 2 casesAll aircraft: 358 cases
Object/animal/substance: fence/fence postEnvironmental issues › Physical environment · Not specifiedFlight Design CTSW: 1 caseAll aircraft: 313 cases
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedFlight Design CTSW: 2 casesAll aircraft: 809 casesProbable cause

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

As the pilot was being radar vectored through controlled airspace, the engine began to sputter and then it "stopped." The pilot was unable to restart the engine, so he moved the propeller to the horizontal position "to protect the engine during touchdown." He selected a "good field" in level pastureland for the forced landing. After turning onto the base leg, he noticed a number of horses grazing at the beginning of the field and he turned on final approach sooner than intended. This moved his touchdown point further downfield than he wanted. Indicated airspeed was 50 mph in the flare. He lowered the flaps to 40 degrees. As soon as he cleared the horses, he retracted the flaps to "increase the friction of the brakes on the grassy pasture surface. This made the pasture a little short" and the airplane overran the end and struck a wire fence, collapsing the nose gear and buckling the composite structure. The pilot admitted that the engine lost power due to fuel exhaustion "which could have been avoided by obtaining fuel at the last stop." He said the airplane was not equipped with in-flight readable fuel indicators, only a dipstick gauge, and this makes it "tricky to utilize the full 34 gallon capacity." He concluded that "an accurate fuel gauge and experience with timing and fuel usage at a certain RPM would have solved this fuel management problem." He recommended that "the fuel indicator tubes in the wing roots be changed at every annual inspection."

Factual narrative

On June 21, 2008, at 1613 central daylight time, a Flight Design GMBH CTSW, N460CT, piloted by a private pilot, was substantially damaged when it struck a fence and nosed over during a forced landing after the engine lost power near Von Ormy, Texas. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under the provisions of Title 14 CFR Part 91 without a flight plan. The pilot and passenger on board the airplane were not injured. The cross-country flight originated in Houston (SGR), Texas, at 1430, and was en route to Castorville (T89), Texas. According to the pilot's accident report, he was at 5,000 feet msl (above mean sea level) and was being vectored through San Antonio (SAT) airspace by SAT approach control. The engine began to sputter and then it "stopped." The pilot was unable to restart the engine, so he moved the propeller to the horizontal position "to protect the engine during touchdown." He selected a "good field" in level pastureland for the forced landing. After turning onto the base leg, he noticed a number of horses grazing at the beginning of the field and he turned on final approach sooner than intended. This moved his touchdown point further downfield than he wanted. Indicated airspeed was 50 mph in the flare. He lowered the flaps to 40 degrees. As soon as he cleared the horses, he retracted the flaps to "increase the friction of the brakes on the grassy pasture surface. This made the pasture a little short" and the airplane overran the end and struck a wire fence, collapsing the nose gear and buckling the composite structure. The pilot admitted that the engine lost power due to fuel exhaustion "which could have been avoided by obtaining fuel at the last stop." He said the airplane was not equipped with in-flight readable fuel indicators, only a dipstick gauge, and this makes it "tricky to utilize the full 34 gallon capacity." He concluded that "an accurate fuel gauge and experience with timing and fuel usage at a certain RPM would have solved this fuel management problem." He recommended that "the fuel indicator tubes in the wing roots be changed at every annual inspection."

Aircraft

Registration
N460CT
Reported as
Flight Design Ctsw
Category
Airplane
Serial number
05-07-06
Airframe hours
322
Engine
Rotax 912ULS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
John R. Rimmer III
Airworthiness certificate
Special, Special light-sport (Special)
Last inspection
Annual · February 1, 2008 · 33 hours before
Departed
SGR · Houston, TX
Destination
T89 · Castorville, TX

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
81
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Sport pilot, With waivers/limitations
Last flight review
February 1, 2008
Seat
Left
Flight hours
5,957 total · 9 in the last 90 days · 7 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 0 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 64 °F
Altimeter
30.10 inHg
Observed at
SAT

FAA reports on this event · 1

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

Other investigations on N460CT · 2

Matched to the same aircraft by N-number and date.