DEN08LA102

NTSB accident investigation · Cessna 150G · Brenham, TX · June 10, 2008

Accident · No injuriesLimited investigationFinal report
Date
June 10, 2008, 12:50 local (17:50 UTC)
Place
Brenham, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4691RCessna 150G
Defining event
Initial climb: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report August 28, 2008
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
Case key
68204

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 sudden windshift (crosswind gust), rendering directional control impossible. Contributing factors in this accident were the high speed during the aborted takeoff and trees.

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.

Wind: sudden wind shiftEnvironmental issues › Conditions/weather/phenomena · Not specifiedAll aircraft: 114 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Not specifiedAll aircraft: 1,008 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Not specifiedAll aircraft: 1,199 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAll aircraft: 3,958 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not specifiedAll aircraft: 1,681 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeAll aircraft: 933 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

The pilot said he checked the weather and radar and noted "a few small showers in the area, nothing close." He said the airport was surrounded by 15-20 foot trees that jut out from the perimeter of the airport towards the runway. There was a 10-knot crosswind, so the pilot selected runway 16 "since it has a down slope." He used a crosswind takeoff procedure. When he rotated, "a tremendous gust of wind hit the aircraft from the rear-left quarter and forced the aircraft sideways off the runway and towards some trees" near the runway. The pilot aborted the takeoff but was unable to stop the airplane and it collided with the trees. According to the airport's AWOS, the wind was from 100 degrees at 5 knots, with "lightning distant east and southeast."

Factual narrative

On June 10, 2008, approximately 1250 central daylight time, a Cessna 150G, N4691R, piloted by a commercial pilot, was substantially damaged when it struck a grove of trees following a loss of control during takeoff from Brenham Municipal Airport (11R), Brenham, Texas. Visual meteorological conditions prevailed at the time of the accident. The aerial observation flight was being conducted under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91 without a flight plan. The pilot, the sole occupant on board, was not injured. The cross-country flight was originating at the time of the accident and was en route to Conroe, Texas (CXO).

In his accident report, the pilot said he checked the weather and radar and noted "a few small showers in the area, nothing close." He said the airport was surrounded by 15 to 20-foot trees that "jut out from the perimeter of the airport towards the runway." There was a 10 knot crosswind, so the pilot selected runway 16 "since it has a down slope." He used a crosswind takeoff procedure. When he rotated, "a tremendous gust of wind hit the aircraft from the rear-left quarter and forced the aircraft sideways off the runway and towards some trees" near the runway. The pilot aborted the takeoff but was unable to stop the airplane and it collided with the trees.

According to the 11R AWOS (Automated Weather Observation Station) report at 1246, the wind was from 100 degrees at 5 knots, with "lightning distant east and southeast."

Aircraft

Registration
N4691R
Reported as
Cessna 150G
Category
Airplane
Serial number
15064741
Airframe hours
6,339
Engine
Continental O-200-A, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial observation · Part 91
Operator
American Views, Inc.
Registered owner
A&G Aircraft Leasing, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 1, 2008 · 47 hours before
Departed
11R · Brenham, TX
Destination
CXO · Conroe, TX
Airport
11R · Brenham Municipal, runway 16, 5,496 × 75 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
50
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
July 1, 2006
Seat
Left
Flight hours
1,474 total · 625 in this make and model · 1,432 as pilot in command · 45 in the last 90 days · 45 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 66 °F
Altimeter
30.01 inHg
Observed at
11R