FTW04LA174

NTSB accident investigation · Grumman AA-1 · Gordonville, TX · July 4, 2004

Accident · Minor injuriesLimited investigationFinal report
Date
July 4, 2004, 09:30 local (14:30 UTC)
Place
Gordonville, TX
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6241LGrumman AA-1
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20040704027589A
Case key
59555

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 premature lift-off and his failure to abort the takeoff. Contributing factors were the soft and muddy runway conditions and the unfavorable winds.

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 control - in flightTakeoff - initial climb
Lift-off - prematurePilot in commandCause
Weather condition - unfavorable windFactor
Soft field takeoff/procedure - attemptedPilot in command
Aborted takeoff - not performedPilot in commandCause
Airport facilities,runway/landing area condition - softFactor
Airport facilities,runway/landing area condition - muddyFactor
In flight collision with terrain/waterTakeoff
Terrain condition - water

Analysis

The 4,333-hour pilot stated that there was an "almost direct crosswind," as the airplane attempted to takeoff from a 3,000 feet long turf runway. The runway was reported to be "soft" and the pilot expected a longer than normal takeoff roll and elected to use the "soft field" takeoff procedure. The pilot further stated that acceleration was "a bit slower than he was used to, but seemed OK." Approximately halfway down the runway, "the airplane became airborne, with a short squawk from the stall warning system." The pilot "let off some back pressure, and the airplane touched down for a few feet before getting airborne again." As the airplane passed a large tree on the departure end of the runway, the pilot reported that a "gust of wind" caught the right win, and the nose dipped down. Subsequently, the left wing impacted water before the airplane came to rest in an inverted position in a lake.

Factual narrative

On July 4, 2004, approximately 0930 central daylight time, a Grumman AA-1 single-engine airplane, N6241L, was substantially damaged following a loss of control during takeoff from Cedar Mills Airport (3T0), a turf airstrip, near Gordonville, Texas. The commercial pilot and passenger sustained minor injuries. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The flight was originating at the time of the accident, with Hicks Airfield (T67), near Saginaw, Texas, as its intended destination.

The 4,333-hour pilot reported in the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) that there was an "almost direct crosswind," as the airplane departed from runway 07. The down-hill runway is 3,000 feet long and 60 feet wide, and is adjacent to a lake. The pilot further stated that the runway was soft. The pilot elected to use a "soft field" takeoff technique as he expected a longer than normal takeoff roll due to the soft runway condition. The pilot noted that the acceleration was "a bit slower than I was used to, but seemed OK." Approximately halfway down the runway, "the airplane became airborne, with a short squawk from the stall warning system." The pilot "let off some back pressure, and the airplane touched down for a few feet before getting airborne again." As the airplane passed a large tree on the departure end of the runway, the pilot reported that a "gust of wind" caught the right wing, and the nose dipped down. Subsequently, the left wing impacted water and the airplane came to rest in the inverted position in the lake.

Examination of the airplane by an Federal Aviation Administration (FAA) inspector, who responded to the accident site, revealed structural damage to both wings and the tail section. The cockpit area, fuselage, propeller, and engine cowling also received substantial damage.

At 0950, the automated surface observing system at Grayson County Airport (GYI), near, Sherman/Denison, Texas, located 10 miles southeast from the accident site, reported wind from 210 at 15 knots, visibility 10 statute miles, clouds scattered at 1,700 feet, temperature 82 degrees Fahrenheit, dew point 73 degrees Fahrenheit, and barometric pressure of 29.92 inches of Mercury. The density altitude was calculated by the NTSB investigator-in-charge at 2,333 feet.

Aircraft

Registration
N6241L
Reported as
Grumman AA-1
Category
Airplane
Serial number
AA1-0441
Airframe hours
1,995
Engine
Lycoming O-235-C2C, 108 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 91
Registered owner
Daniel Campbell
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 2003 · 25 hours before
Departed
3T0 · Cedar Mills, TX
Destination
T67 · Saginaw, TX
Airport
3T0 · Cedar Mills Airport, runway 07, 3,000 × 60 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
58
Injuries
Minor
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
August 24, 2002
Seat
Left
Flight hours
4,333 total · 88 in this make and model · 2,571 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 15 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 73 °F
Altimeter
29.92 inHg
Observed at
GYI, 10 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.