LAX07CA009

NTSB accident investigation · Finney Thorp T-18 · San Diego, CA · October 13, 2006

Accident · No injuriesData collectionFinal report
Date
October 13, 2006, 13:25 local (21:25 UTC)
Place
San Diego, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N467JFFinney Thorp T-18
Weather
Visual (VMC) · Day
Status
Completed · report February 26, 2007
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20061013029299A
Case key
64714

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 inadequate compensation for the crosswind conditions and failure to maintain directional control during landing.

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
Compensation for wind conditions - inadequatePilot in commandCause
Weather condition - crosswind
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - encountered
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - runway

Analysis

The airplane ground looped during the landing rollout and the right wing was bent. The pilot reported that the approach and touchdown were normal, but he lost directional control during the rollout due to crosswind conditions. The pilot stated that there were no mechanical anomalies with the airplane.

Factual narrative

On October 13, 2006, about 1325 Pacific standard time, an experimental Finney Thorpe T-18, N467JF, ground looped after landing on runway 28L at Montgomery Field (MYF), San Diego, California. The private pilot/owner operated the airplane under the provisions of 14 CFR Part 91 as a personal flight. The airplane sustained substantial damage to the right wing. The pilot was not injured. Visual meteorological conditions prevailed for the local area flight. The airplane departed at an unknown time from MYF.

The National Transportation Safety Board investigator-in-charge (IIC) interviewed the pilot. The pilot reported that there was a direct crosswind of about 10-15 knots. He made a normal approach and landing. On the landing rollout, the airplane ground looped, and bent the right wing. The pilot stated that there were no mechanical anomalies with the airplane.

According to tower personnel, the airplane bounced on landing, porpoised down the runway, and struck the ground in a right wing low nose down attitude.

The recorded routine aviation weather report (METAR) issued for MYF at 1253 indicated: winds from 170 at 7 knots; visibility 10 statue miles; a scattered cloud layer at 6,000 feet; temperature 21 degrees Celsius; dew point 11 degrees Celsius; and altimeter 29.81 inches of Mercury (inHg). At 1325, the recorded winds were from 230 degrees at 9 knots. At 1353, the recorded winds were from 220 degrees at 11 knots.

Aircraft

Registration
N467JF
Reported as
Finney Thorp T-18
Category
Airplane, amateur-built
Serial number
467
Engine
Lycoming O-320, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
MYF · San Diego, CA
Destination
MYF · San Diego, CA
Airport
MYF · Montgomery Field, runway 28L, 3,401 × 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
42
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2
Flight hours
500 total · 100 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 52 °F
Altimeter
29.80 inHg
Observed at
MYF

FAA reports on this event · 1

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

Other investigations on N467JF · 1

Matched to the same aircraft by N-number and date.