LAX90DUM02

NTSB accident investigation · Cunningham Prescott Pusher · San Diego, CA · May 17, 1990

Accident · FatalFinal report
Date
May 17, 1990, 09:46 local (16:46 UTC)
Place
San Diego, CA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N58PPCunningham Prescott Pusher
Weather
Visual (VMC) · Day
Status
Completed · report September 21, 1992
Report
Approved by Office Director
FAA report
19900517016509A
Case key
26551

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

Engine failure due to mechanical failure of he internal components to the engine.

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 engine power(total) - mech failure/malfTakeoff - initial climb
Engine assembly,piston - seizedCause
Maintenance,installation - performedPilot in commandCause
Engine assembly,cylinder - binding(mechanical)Factor
Fuel system,carburetor float - low levelFactor
Maintenance,adjustment - selectedPilot in commandCause
Ignition system,spark plug - burnedCause
Ignition system,spark plug - improperCause
Maintenance,replacement - improperPilot in commandCause
In flight collision with terrain/waterDescent - emergency

Analysis

The pilot reported that immediately after takeoff the engine lost power. The aircraft crashed into the side of a hill during the attempt to return to the airport. Examination of the spark plug to the no. 3 cylinder had burned/melted with the others indicating excessive heat damage. The no. 3 piston was found seized on the connecting rod. The float in the carburetor was found set to a very lean condition with the float chamber vent line plugged/capped off. The total engine time was 1.9 hours with a total flight time approximately three minutes.

Aircraft

Registration
N58PP
Reported as
Cunningham Prescott Pusher (PRESCOTT P)
Category
Airplane, amateur-built
Serial number
42
Airframe hours
2
Engine
Ford V-6, 260 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Cunningham, Coulter
Registered owner
Ewc Cunningham
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Unknown · May 16, 1990 · 2 hours before
Departed
SDM · San Diego, CA
Destination
CA

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
74
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
27,000 total · 2 in this make and model · 21,500 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Lowest ceiling
None

FAA reports on this event · 1

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