LAX94LA319

NTSB accident investigation · Perth Amboy Bird BK · El Cajon, CA · August 12, 1994

Accident · No injuriesLimited investigationFinal report
Date
August 12, 1994, 11:30 local (18:30 UTC)
Place
El Cajon, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
NC731YPerth Amboy Bird BK
Weather
Visual (VMC) · Day
Status
Completed · report January 12, 1995
Report
Approved by Office Director
Case key
28825

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's inadequate compensation for the wind conditions and his failure to maintain directional control of the aircraft. The unfavorable wind was a factor.

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 - on ground/waterLanding - roll
Weather condition - unfavorable windFactor
Compensation for wind conditions - inadequatePilot in commandCause
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in command
On ground/water encounter with terrain/waterLanding - roll

Analysis

The pilot reported that he performed a normal landing on runway 27 right. As the airplane slowed to about 15 mph, a 'swirling gust of wind' lifted the tail and turned the airplane to the left. The pilot noted that at this slow speed the rudder and elevator were not effective and his efforts to counteract the left turn were not effective. The aircraft left the pavement and ground looped when the left main wheel encountered soft soil. The right wing contacted the ground and was damaged during the uncontrolled swerve.

Factual narrative

On August 12, 1994, at 1130 Pacific daylight time, an antique Perth Amboy Bird BK airplane, NC731Y, ground looped on landing at the Gillespie airport, El Cajon, California. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft sustained substantial damage to the lower outboard right wing. The certificated airline transport pilot and the one passenger on board were not injured. The flight originated at the Gillespie airport on the day of the accident at 1100 hours as a local area personal flight.

In his written statement, the pilot reported that he performed a normal landing on runway 27 right. As the airplane slowed to about 15 mph, a "swirling gust of wind" lifted the tail and turned the airplane to the left. The pilot noted that at this slow speed the rudder and elevator were not effective and his efforts to counteract the left turn were not effective. The aircraft left the pavement and ground looped when the left main wheel encountered soft soil. The right wing contacted the ground and was damaged during the uncontrolled swerve.

Aircraft

Registration
NC731Y
Reported as
Perth Amboy Bird BK
Category
Airplane
Serial number
2039-19
Engine
Kinner K-5, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
San Diego Aerospace Museum
Registered owner
San Diego Aerospace Museum
Airworthiness certificate
Standard, Normal
Departed
SEE
Destination
SEE
Airport
SEE · Gillespie Field, runway 27R, 5,371 × 100 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
73
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
25,000 total · 9 in this make and model · 25,000 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
20 statute miles
Lowest ceiling
20,000 ft broken
Temperature
97 °F
Altimeter
29.00 inHg
Observed at
SEE, 1 nm away