CEN23LA010

NTSB accident investigation · Zenith CH 750 · Libby, MN · October 7, 2022

Accident · No injuriesClass 4 · LimitedFinal report
Date
October 7, 2022, 16:30 local (21:30 UTC)
Place
Libby, MN · Wooded area along the Mississippi River shoreline
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N550ZFZenith CH 750
Defining event
Enroute-cruise: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
Federal Aviation Administration - Minneapolis FSDO
FAA report
20221007017339A
Case key
106094

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The total loss of engine power due to the pilot’s improper fuel management, which led to fuel starvation. Contributing to the accident was the low altitude at which the loss of engine power occurred.

Findings · 2

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 managementKingery Michael C ZENITH CH-750: 1 caseAll aircraft: 1,695 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 was conducting a personal flight when the airplane had a total loss of engine power during cruise flight. The pilot stated that the flight departed with about 16 gallons of fuel distributed evenly between the left- and right-wing tanks, and both fuel tank gauges indicated about ¾ full before departure. About 30-45 minutes into the flight, the pilot noted that the left fuel tank gauge indicated about ¼ full while the right fuel tank gauge remained about ¾ full. The pilot decided to reposition the fuel selector valve to the right fuel tank to correct the fuel imbalance. The pilot stated that the location of his Apple iPad in the cockpit blocked his view of the right fuel tank gauge, so he made a “mental note” to check the right fuel tank gauge in about 30-45 minutes. The pilot reported that the flight continued uneventfully at 300 ft above ground level until the airplane had a total loss of engine power due to a lack of fuel in the right fuel tank. The engine did not restart after the pilot repositioned the fuel selector valve to BOTH, turned on the electric fuel boost pump, and engaged the electric starter. Both wings were substantially damaged during the subsequent forced landing in a wooded area. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The low altitude at which the loss of engine power occurred significantly reduced the amount of time available to the pilot to troubleshoot and restore engine power before the forced landing.

Aircraft

Registration
N550ZF
Reported as
Zenith CH 750 (NO SERIES)
Category
Airplane, amateur-built
Serial number
75-7677
Built
2010
Airframe hours
510
Engine
Continental O-200, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
McGregor Communications LLC
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · September 6, 2022 · 4 hours before
Departed
AIT · Aitkin, MN
Destination
HZX · McGregor, MN
Equipment
Electronic flight bag or handheld device

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
79
Injuries
None
Certificates
Flight engineer, Airline transport
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Sport pilot
Seat
Left
Restraint
3-point
Flight hours
13,000 total · 10 in this make and model · 8,000 as pilot in command · 5 in the last 90 days · 3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
45 °F, dew point 28 °F
Altimeter
30.42 inHg
Observed at
HZX, 10 nm away
METAR
METAR KHZX 072135Z AUTO 27005KT 10SM SCT043 07/M02 A3042 RMK AO2=

Docket · 5

The files NTSB released with the investigation on April 20, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.0 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.