LAX07CA100

NTSB accident investigation · Hirsch Thorp T-18 · San Diego, CA · March 3, 2007

Accident · Minor injuriesData collectionFinal report
Date
March 3, 2007, 11:00 local (19:00 UTC)
Place
San Diego, CA
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N78DHHirsch Thorp T-18
Weather
Visual (VMC) · Day
Status
Completed · report May 29, 2007
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20070303003929A
Case key
65373

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 improper bounced landing recovery and improper use of the flight controls that resulted in a porpoise and a nose over.

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.

Nose overLanding
Recovery from bounced landing - improperPilot in commandCause
Porpoise/pilot-induced oscillation - not correctedPilot in commandCause
Aborted landing - attemptedPilot in command
Flight controls - improper use ofPilot in commandCause

Analysis

The conventional gear airplane bounced two times after touchdown and nosed over. On the first bounce, the pilot added a small amount of power to allow the airplane to settle back onto the runway. However, the airplane bounced again, and he added full power in an attempt to go around and pushed forward on the control stick. The propeller then contacted the runway and the airplane nosed over. The pilot stated that there were no mechanical failures or malfunctions during the flight.

Factual narrative

On March 3, 2007, about 1100 Pacific standard time, an amateur built experimental Hirsch Thorp T-18, N78DH, nosed over during landing at Brown Field Municipal Airport (SDM), San Diego, California. The owner/pilot was operating the airplane under the provisions of 14 CFR Part 91. The private pilot and one passenger received minor injuries; the airplane sustained substantial damage. The local personal flight departed SDM about 1000. Visual meteorological conditions prevailed, and no flight plan had been filed. The approximate global positioning system (GPS) coordinates of the primary wreckage were 32 degrees 34 minutes north latitude and 116 degrees 58 minutes west longitude.

The pilot operator stated in a written report that while landing on runway 8L the airplane bounced and became airborne. The pilot added a small amount of power and let the airplane settle back onto the runway. The airplane bounced again, and the pilot noticed that the airplane was close to the right edge of the runway. He applied full power and pushed forward on the control stick. The propeller struck the runway and the airplane nosed over.

The pilot stated that the airplane and engine had no mechanical failures or malfunctions during the flight.

Aircraft

Registration
N78DH
Reported as
Hirsch Thorp T-18
Category
Airplane, amateur-built
Serial number
125
Airframe hours
1,778.4
Engine
Lycoming O-320-D25, 170 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · March 1, 2006 · 6 hours before
Departed
SDM · San Diego, CA
Destination
San Diego, CA
Airport
SDM · Brown Field Muni, runway 8L, 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
61
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
March 1, 2006
Seat
Left
Flight hours
284 total · 4 in this make and model · 76 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 25 °F
Altimeter
30.20 inHg
Observed at
SDM

FAA reports on this event · 1

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