WPR11CA066

NTSB accident investigation · Grumman American Avn. AA-5B · Coalinga, CA · November 26, 2010

Accident · No injuriesData collectionFinal report
Date
November 26, 2010, 15:15 local (23:15 UTC)
Place
Coalinga, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N74400Grumman American Avn. AA-5B
Defining event
Takeoff-rejected takeoff: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report April 12, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20101126053359A
Case key
77889

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 remove the gust lock prior to takeoff.

Findings · 2

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.

Flight control system: gust lock or damperAircraft › Aircraft systems · Incorrect use/operationGrumman American Avn. AA-5B: 1 caseAll aircraft: 14 casesProbable cause
Inspection: preflight inspectionPersonnel issues › Task performance · PilotGrumman American Avn. AA-5B: 1 caseAll aircraft: 551 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

According to the pilot, she did not perform a flight control check prior to takeoff. During the departure roll, when the airplane reached 70 miles per hour, she realized that the gust lock was still installed in the control column. She attempted to remove the device, but was unsuccessful. She reduced the engine power in an attempt to stop the airplane, but it continued off the end of the runway; the nose gear separated, and it came to rest in a dirt field. The airplane sustained substantial damage to the firewall and right wing.

Factual narrative

The pilot submitted a written statement. She said she did not conduct a control check prior to takeoff. During the departure roll when the airplane reached 70 miles per hour, she realized the gust lock was still installed. She attempted to remove it unsuccessfully and then reduced the throttle attempting to stop the airplane. The airplane went off the end of the runway, the nose gear separated, and it came to rest in a dirt field. The airplane sustained substantial damage to the firewall and right wing.

Aircraft

Registration
N74400
Reported as
Grumman American Avn. AA-5B
Category
Airplane
Serial number
AA5B-0213
Airframe hours
2,370
Engine
Textron Lycoming O-360-A4K, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Anna Longwell
Registered owner
Anna Longwell
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 15, 2010 · 16 hours before
Departed
3O8 · Coalinga, CA
Destination
PAO · Palo Alto, CA
Airport
3O8 · Harris Ranch, runway 14, 2,820 × 30 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
75
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
February 28, 2009
Seat
Left
Flight hours
1,282 total · 400 in this make and model · 921 as pilot in command · 6 in the last 90 days · 3 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 34 °F
Altimeter
30.15 inHg
Observed at
NLC, 15 nm away

Docket · 3

The files NTSB released with the investigation on December 20, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 MB 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.