LAX93LA374

NTSB accident investigation · Ercoupe 415C · Columbia, CA · September 26, 1993

Accident · No injuriesLimited investigationFinal report
Date
September 26, 1993, 11:50 local (18:50 UTC)
Place
Columbia, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N3561HErcoupe 415C
Weather
Visual (VMC) · Day
Status
Completed · report September 26, 1994
Report
Approved by Office Director
FAA report
19930926037769A
Case key
28494

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 use of the elevator control during the takeoff ground roll which resulted in a porpoise and nose gear collapse. A factor in the accident was the pilot's low total experience and lack of total time in type.

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 gear collapsedTakeoff - roll/run
Elevator - improper use ofPilot in commandCause
Lack of total experiencePilot in commandFactor
Lack of familiarity with aircraftPilot in commandFactor
Porpoise/pilot-induced oscillation - not correctedPilot in commandCause
Landing gear,nose gear - overload

Analysis

The pilot had recently purchased the aircraft and had only 6 hours in type. He reported that on the takeoff ground roll as the aircraft accelerated through 42 mph indicated, the aircraft began to liftoff. The pilot noted that he had been instructed to lift off at 55 mph, and, 'not wanting to stall or mush,' he applied down elevator to keep the aircraft on the runway. The aircraft began to porpoise, then veered off the runway after the collapse of the nose landing gear.

Factual narrative

On September 26, 1993, at 1150 Pacific daylight time, a Ercoupe 415C, N3561H, sustained substantial damage following an on ground loss of control during the takeoff ground run at Columbia, California. According to the pilot's verbal statement, the aircraft began porpoising during the takeoff run and the nose gear collapsed during repeated impacts with the runway. The aircraft was owned and operated by the pilot. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft incurred substantial airframe damage to the engine firewall. The certificated private pilot, the sole occupant, was not injured. The flight was originating as a personal cross country flight to Livermore, California.

The pilot had recently purchased the aircraft and had only 6 hours in type. He reported that on the takeoff ground roll as the aircraft accelerated through 42 mph indicated, the aircraft began to liftoff. The pilot noted that he had been instructed to lift off at 55 mph, and, "not wanting to stall or mush," he applied down elevator to keep the aircraft on the runway. The aircraft began to porpoise, then veered off the runway after the collapse of the nose landing gear.

Aircraft

Registration
N3561H
Reported as
Ercoupe 415C
Category
Airplane
Serial number
4186
Engine
Continental C85-12F, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Timothy E. Roberts
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 24, 1993 · 6 hours before
Departed
O22
Destination
LVK · Livermore, CA
Flight plan
VFR
Airport
O22 · Columbia, runway 17, 4,670 × 75 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
39
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
82 total · 6 in this make and model · 50 as pilot in command · 6 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
20 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 55 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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