LAX04LA320

NTSB accident investigation · Hebb Avid Magnum · Bridgeport, CA · September 17, 2004

Accident · Serious injuriesLimited investigationFinal report
Date
September 17, 2004, 13:41 local (20:41 UTC)
Place
Bridgeport, CA
Injuries
1 serious
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N970JHHebb Avid Magnum
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2005
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20040917024339A
Case key
60201

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 adequately compensate for the crosswind condition and his failure to maintain an adequate airspeed while using crossed controls, which led to a stall.

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
Weather condition - crosswind
Compensation for wind conditions - inadequatePilot in commandCause
Airspeed - not maintainedPilot in commandCause
Stall - encounteredPilot in command
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

Shortly after takeoff in a 90-degree, 10-knot crosswind the pilot lost control of the airplane and it impacted terrain. The pilot said that during preflight preparations for the accident flight, he noted a crosswind from the left that he estimated to be greater than 10 nautical miles per hour, and at 90 degrees to the departure runway 34. Concerned about the crosswind, the pilot decided not to take passengers on the flight, as he had previously planned. The pilot stated that he was familiar with operating the airplane in similar crosswind conditions, and did not encounter difficulty taxing the airplane to the departure runway. After beginning the takeoff roll and becoming airborne, the airplane was upset and the pilot experienced a loss of control. A witness reported that the airplane took off with an estimated 90-degree crosswind to the runway. The windsock was about 90 percent full. During takeoff, the airplane drifted to the left, and climbed to about 100 feet. The airplane then rolled to the right and impacted terrain nose down, 30 to 40 feet east of the runway. The witness said the rudder was deflected fully to the right, and the right aileron was fully deflected down just before the airplane rolled off to the right and hit the ground. The pilot reported no preimpact mechanical malfunctions or failures with the airplane.

Factual narrative

On September 17, 2004, about 1341 Pacific daylight time, a Hebb Avid Magnum, N970JH, collided with the ground 15 seconds after takeoff at Bryant Field, Bridgeport, California. The owner was operating the airplane under the provisions of 14 CFR Part 91. The private pilot was seriously injured and the airplane was destroyed. The personal cross-country flight departed Bryant Field with the intended destination of Nevada County Air Park, Grass Valley, California. Visual meteorological conditions prevailed, and a flight plan had not been filed.

In a telephone interview with a National Transportation Safety Board investigator, the pilot reported that he arrived at the Bridgeport airport around 1200. He experienced light turbulence crossing the surrounding mountains, but classified the arrival to Bryant Field as smooth.

During preflight preparations for the accident flight, the pilot noted a crosswind from the left that he estimated to be greater than 10 nautical miles per hour, and at 90 degrees to the departure runway 34. Concerned about the crosswind, the pilot decided not to take passengers on the flight, as he had previously planned. The pilot stated that he was familiar with operating the airplane in similar crosswind conditions, and did not encounter difficulty taxing the airplane to the departure runway. After beginning the takeoff roll and becoming airborne, the airplane was upset and the pilot experienced a loss of control.

The pilot reported no preimpact mechanical malfuncitions or failures with the airplane.

In a telephone interview with a Safety Board Investigator, a witness reported that the airplane took off toward the east, with an estimated 90-degree crosswind to the runway. The windsock was about 90 percent full. During takeoff, the airplane drifted to the left, and climbed to about 100 feet. The airplane then rolled to the right and impacted terrain nose down, 30 to 40 feet east of the runway. The witness stated that the rudder was deflected fully to the right, and the right aileron was fully deflected down just before the airplane rolled off to the right and hit the ground.

Aircraft

Registration
N970JH
Reported as
Hebb Avid Magnum
Category
Airplane, amateur-built
Serial number
77M
Airframe hours
420.6
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 1, 2004 · 28.6 hours before
Departed
KO57 · Bridgeport, CA
Destination
O17 · Grass Valley, CA
Airport
O57 · Bryant Field Airport, runway 34, 4,329 × 60 ft, asphalt

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
71
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
May 1, 2003
Seat
Left
Flight hours
2,123 total · 400 in this make and model · 2,123 as pilot in command · 16 in the last 90 days · 3 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 54 °F
Altimeter
29.75 inHg
Observed at
KMOD, 70 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.