WPR20CA056

NTSB accident investigation · Cosmos Phase II · Lake Havasu City, AZ · December 22, 2019

Accident · Serious injuriesData collectionFinal report
Date
December 22, 2019, 13:00 local (20:00 UTC)
Place
Lake Havasu City, AZ
Injuries
1 serious, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N5057ZCosmos Phase II
Defining event
Enroute-cruise: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report June 16, 2020
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Adminsitration
FAA report
20191222019889A
Case key
100758

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 total loss of engine power due to fuel exhaustion, which resulted from the pilot's inadequate preflight fuel inspection.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelBjornstad Norman L COSMOS PHASE II: 1 caseAll aircraft: 1,695 casesProbable cause
Object/animal/substanceEnvironmental issues › Physical environment · Effect on operationBjornstad Norman L COSMOS PHASE II: 1 caseAll aircraft: 224 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that, while the trike was at cruise flight about 800 ft above ground level, the engine lost power. He attempted to restart the engine to no avail and then initiated a landing in open desert. During the landing roll, the trike impacted a large boulder. Postaccident examination of the trike revealed that it had run out of fuel. The pilot added that the trike was not equipped with a fuel quantity gauge and that the only way to verify the fuel level was to visually look in the fuel tank. Additionally, he thought he had a full tank of fuel before takeoff. The trike sustained substantial damage to the forward upright wing support tubes. The pilot reported that there were no preaccident mechanical failures or malfunctions with the trike that would have precluded normal operation.

Factual narrative

The private pilot reported that during cruise flight at an altitude of about 800 ft above ground level, the engine lost power. Despite his attempt, he could not restart the engine and initiated a landing in the open desert. During the landing roll, the aircraft impacted a large boulder. The pilot stated that the examination of the trike after the accident revealed that he had ran out of gas. The pilot added that the trike was not equipped with a fuel quantity gauge, and that the only way to verify the fuel level was visually looking into the fuel tank. Additionally, he thought he had a full tank of gas prior to takeoff.The trike sustained substantial damage to the forward upright wing support tubes. The pilot reported that there were no preaccident mechanical failures or malfunctions with the trike that would have precluded normal operation.

Aircraft

Registration
N5057Z
Reported as
Cosmos Phase II
Category
Airplane, amateur-built
Serial number
B21479
Built
2000
Engine
Rotax 503, 50 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
Lake Havasu, AZ
Destination
Lake Havasu, AZ
Equipment
Unknown

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
66
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
50 °F, dew point 34 °F
Altimeter
30.07 inHg
Observed at
KEED, 24 nm away

Docket · 2

The files NTSB released with the investigation on February 28, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 631 KB in all.

FAA reports on this event · 1

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