LAX06CA146

NTSB accident investigation · Grumman American AA-1C · San Diego, CA · April 23, 2006

Accident · Minor injuriesData collectionFinal report
Date
April 23, 2006, 16:32 local (23:32 UTC)
Place
San Diego, CA
Injuries
2 minor
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N9756UGrumman American AA-1C
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 2007
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20060423005369A
Case key
63559

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 maintain adequate airspeed, which resulted in a stall during initial climb. A contributing factor was his diverted attention.

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
Airspeed(vso) - not maintainedPilot in commandCause
Diverted attentionPilot in commandFactor
Stall/mush - inadvertentPilot in command
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground
Object - fence

Analysis

The airplane stalled during the turn onto the crosswind leg, and it impacted the ground and a fence. The pilot reported that no mechanical malfunction was experienced during the flight. Regarding the sequence of events leading to the accident, the pilot reported that he had received permission from the local air traffic controller to perform an early turn onto the crosswind leg following takeoff. According to the pilot, during the climb the passenger spoke, and he diverted his attention toward the passenger. Upon looking forward, the pilot noticed that the airplane was stalling. The airplane impacted the ground before he was able to regain control.

Factual narrative

On April 23, 2006, at 1632 Pacific daylight time, a Grumman American AA-1C, N9756U, descended to impact with the ground and a fence during the takeoff initial climb from the Brown Field Municipal Airport, San Diego, California. The airplane came to rest on airport property and was destroyed. The private pilot and one passenger received minor injuries. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight. The flight was performed under the provisions of 14 CFR Part 91, and it originated from the airport about 1631.

On May 2, 2006, the pilot verbally reported to the National Transportation Safety Board investigator that no mechanical malfunction was experienced during the flight. Regarding the sequence of events leading to the accident, the pilot reported that he had received permission from the local air traffic controller to perform an early turn onto the crosswind leg following takeoff. During the turn, he experienced a departure stall.

In the pilot's "Aircraft Accident Report," he described the events that transpired following the crosswind turn as follows: "As I leveled off at approximately 300 feet above ground level, my passenger said something and I glanced over at him as I realized that I was getting slow. I looked forward, and my right wing had dropped. I realized that I had stalled. I remember thinking that I needed to be wings level before I recovered from the stall, so I added left aileron and the wing started to drop more. I added full left aileron and it snapped into a left bank. I tried to arrest the roll and it snapped back to the right, but not quite as far. I tried again, and it snapped to the left again. I realized that this was not going to work. I needed to do something else. I pushed forward on the yoke, started to pick up speed, and regained some roll control. I rolled as level as I could but realized that we had lost too much altitude. I tried to keep from hitting the ground too hard."

Aircraft

Registration
N9756U
Reported as
Grumman American AA-1C
Category
Airplane
Serial number
AA1C0115
Engine
Lycoming O-235, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
First Flight Corp.
Airworthiness certificate
Standard, Utility; Standard, Normal
Departed
SDM · San Diego, CA
Destination
SDM · San Diego, CA
Airport
SDM · Brown Field Municipal Airport, runway 26R, 7,972 × 150 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
51
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Flight hours
309 total · 3 in this make and model · 7 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 12 knots, gusting 17
Visibility
10 statute miles
Lowest ceiling
None
Altimeter
30.09 inHg

Docket · 2

The files NTSB released with the investigation on November 3, 2006, on NTSB’s docket system: statements, records, photos and specialists’ reports. 701 KB in all.

FAA reports on this event · 1

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