WPR23LA303

NTSB accident investigation · Aldinger Albert John Cozy Mark III · McDermitt, OR · August 3, 2023

Accident · Minor injuriesClass 3 · LimitedFinal report
Date
August 3, 2023, 11:45 local (18:45 UTC)
Place
McDermitt, OR · Open desert road
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N964ALAldinger Albert John Cozy Mark III
Defining event
Enroute: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20230803014459A
Case key
192813

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 preflight fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.

Findings · 4

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 levelAldinger Albert John COZY: 1 caseAll aircraft: 1,695 casesProbable cause
Inspection: preflight inspectionPersonnel issues › Task performance · PilotAldinger Albert John COZY: 1 caseAll aircraft: 551 casesProbable cause
Terrain: rough terrainEnvironmental issues › Physical environment · Contributed to outcomeAldinger Albert John COZY: 1 caseAll aircraft: 442 cases

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

According to the pilot, he had recently purchased the airplane and was in the process of relocating it to his home airport. During the flight, he had no way to monitor the fuel burn during the flight other than the fuel sight gauges, which he could not see due to objects blocking his view. While the pilot was not able to monitor the fuel burn during the flight, he did lean the fuel and routinely switched fuel tanks; he believed he had plenty of fuel for the flight. After flying for about 2 hours and 20 minutes, the airplane sustained a complete loss of engine power. Unable to maintain altitude, he conducted an off-airport landing to a dirt road. During the landing roll, the airplane encountered uneven terrain, nosed over, and came to rest inverted. A visual inspection of the fuel system was conducted, and continuity was established from the main fuel tanks throughout the system; however, there was no fuel observed. A functional engine test was conducted, and a ground run was performed at various power settings uneventfully for about 5 minutes. Postaccident examination of the airplane revealed no evidence of preaccident mechanical malfunctions or failures that would have precluded normal operation. The total amount of fuel onboard the airplane before the flight could not be determined; however, given the lack of fuel found in the tanks after the accident and no indications of engine anomalies, it is likely that the loss of engine power was due to fuel exhaustion.

Factual narrative

On August 3, 2023, about 1145 Pacific daylight time, an experimental amateur-built Cozy, N964AL, was substantially damaged when it was involved in an accident near McDermitt, Oregon. The pilot sustained minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he recently purchased the airplane and was in the process of relocating the airplane. He had two prior flights in the accident airplane. On the day of the accident flight, he departed from Shelton, Washington, with the intended destination of Battle Mountain, Nevada. During the flight he had no way to monitor the fuel burn rate other than the fuel sight gauges, which he couldn't see due to objects blocking his view. During the flight, he leaned the fuel to slightly lean of peak, routinely switched fuel tanks, and believed he had plenty of fuel for the flight. After flying for about 2 hours and 20 minutes at an altitude of about 9,500 ft mean sea level (msl), the airplane sustained a complete loss of engine power. Unable to maintain altitude, the pilot elected to conduct an off-airport landing to a dirt road. During the landing roll, the airplane encountered uneven terrain, nosed over, and came to rest inverted. Postaccident examination of the airplane identified crushing of the forward fuselage. Flight control continuity was established from all primary flight control surfaces to the cockpit controls. Wreckage recovery personnel reported that they did not observe any fuel residue in the wreckage, detect any odor of fuel, or recover any fuel. They did not observe any noticeable discoloration of the surrounding vegetation. Examination of the recovered airframe and engine revealed no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. No visible damage was observed to the left and right fuel tanks and no fuel or liquid was observed in the fuel tanks. A visual inspection of the fuel system was conducted, and continuity was established from the main fuel tanks to the carburetor. A small amount of fuel was observed in the airframe fuel strainer. The carburetor bowl was void of fuel. A functional engine test was conducted. An external fuel tank was attached to the right-wing fuel inlet line. During an initial attempt to start the engine, the airplane’s battery did not have a sufficient charge to crank the engine. An external power source was attached to the battery and the engine started. Due to the damage to the forward fuselage, the throttle was not advanced to the full forward position. However, the engine did run at various power settings.

Aircraft

Registration
N964AL
Reported as
Aldinger Albert John Cozy Mark III
Category
Airplane, amateur-built
Serial number
263
Built
1996
Airframe hours
834.8
Engine
Lycoming O-360-A3A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · July 18, 2023
Departed
SHN · Shelton, WA
Destination
BAM · Battle Mountain, NV
Flight plan
VFR
Equipment
Onboard weather, Electronic primary flight display, Auto-pilot, ADS-B

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
75
Injuries
Minor
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
BasicMed, With waivers/limitations
Last flight review
July 30, 2023
Seat
Left
Restraint
3-point
Flight hours
2,880 total · 4 in this make and model · 900 as pilot in command · 6 in the last 90 days · 6 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Temperature
88 °F, dew point 46 °F
Altimeter
30.06 inHg
Observed at
KREO, 21 nm away
METAR
METAR KREO 031852Z AUTO 00000KT 31/08 A3006 RMK AO1 SLP128 T03110083=

Docket · 6

The files NTSB released with the investigation on February 13, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.1 MB 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.