CEN20LA397

NTSB accident investigation · Zenith CH 750 · Montgomery City, MO · September 16, 2020

Accident · No injuriesClass 3 · LimitedFinal report
Date
September 16, 2020, 12:53 local (17:53 UTC)
Place
Montgomery City, MO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N4744MZenith CH 750
Defining event
Approach: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
Flight Standards District Office
FAA report
20200916013109A
Case key
101985

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 pilot’s inadequate fuel management and flight planning, which led to a total loss of engine power due to fuel exhaustion and a forced landing into rough terrain.

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.

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, the airplane was fueled with 22-23 gallons of fuel before he departed, and the airplane’s fuel consumption rate was about 6 gallons of fuel per hour. He had been airborne about 4 hours and was approaching his destination when the engine sputtered and lost total power. The pilot made a forced landing into rough terrain and the airplane nosed over. Examination of the airplane revealed minimal fuel was onboard, with no leaks of the fuel system. No preimpact anomalies were observed during examination of the engine. The pilot’s preflight planning notes indicated he considered a fuel stop prior to the destination. After the accident, the pilot stated that the onboard fuel quantity indicating system was unreliable and a fuel stop may have been warranted. The pilot’s decision to proceed to the destination without a fuel stop likely resulted in a total loss of engine power due to exhaustion of usable fuel.

Factual narrative

On September 16, 2020, about 1253 central daylight time, an amateur-built Zenith CH 750 airplane, N4744M, was substantially damaged when it was involved in an accident near Montgomery City, Missouri. The private pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot planned the flight from Kyle-Oakley Field Airport (CEY) Murray, Kentucky to Mexico Memorial Airport, Mexico (MYJ), Missouri. The pilot was making the first long cross-country flight in the airplane and estimated 22-23 gallons of fuel were onboard, with an expected fuel consumption rate of about 6 gallons per hour. After departing CEY about 0958, the engine sputtered and lost total power while approaching MYJ about 1251. The pilot made a forced landing into a bean field and the airplane nosed over, which damaged both wings and tail. Examination of the airplane at the accident site the next day revealed all fuel lines were intact and undamaged, with no smell of fuel noticed. While the airplane was inverted, the right fuel tank cap was removed, and no fuel was observed. During recovery of the airplane four days after the accident, minimal fuel was noticed in the fuel lines and none of the soybean crops near the airplane were blighted. At the recovery location, about ¼ cup of fuel was drained from the fuel strainer, with no indication of water. Both fuel tanks were refilled and held about 12 gallons in each tank, which was consistent with the flight manual. The fuel was drained, with no contamination noticed. No preimpact anomalies were observed during examination of the engine. Review of the pilot’s handwritten flight notes revealed he considered a fuel stop between CEY and MYJ. Following the flight, the pilot stated the onboard fuel quantity indicating system was unreliable and that a fuel stop may have been warranted. Additionally, a new carburetor was installed about four months prior to the accident and the fuel consumption rate had not been verified with the new carburetor installed.

Aircraft

Registration
N4744M
Reported as
Zenith CH 750
Category
Airplane, amateur-built
Serial number
75-8874
Built
2017
Airframe hours
84
Engine
Continental O-200, 100 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · February 7, 2020 · 34 hours before
Departed
CEY · Murray, KY
Destination
MYJ · Mexico, MO
Equipment
Onboard weather, ADS-B, Auto-pilot, Electronic multifunction display, Handheld GPS

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
73
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
BasicMed, With waivers/limitations
Last flight review
November 25, 2019
Seat
Left
Restraint
3-point
Flight hours
836 total · 69 in this make and model · 747 as pilot in command · 10 in the last 90 days · 7 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 63 °F
Altimeter
30.09 inHg
Observed at
KCOU, 30 nm away

Docket · 4

The files NTSB released with the investigation on June 3, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.9 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.