CEN15LA112

NTSB accident investigation · Mooney M20C · Lonoke county, AR · January 17, 2015

Accident · No injuriesLimited investigationFinal report
Date
January 17, 2015, 16:30 local (22:30 UTC)
Place
Lonoke county, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6474UMooney M20C
Defining event
Initial climb: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report August 11, 2015
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20150117001409A
Case key
90627

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 loss of engine power due to fuel starvation.

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.

Engine controls: mixture controlAircraft › Aircraft power plant · Incorrect service/maintenanceMooney M20C: 1 caseAll aircraft: 41 cases
Fuel system: fuel distributionAircraft › Aircraft systems · Not specifiedMooney M20C: 1 caseAll aircraft: 141 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelMooney M20C: 16 casesAll aircraft: 1,695 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeMooney M20C: 3 casesAll aircraft: 933 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

The pilot reported that, before departure, he conducted an engine run-up, and everything was in the normal operating range. The pilot then departed, and, shortly after takeoff, the engine lost power. During the forced landing, the airplane impacted trees and then came to rest on its belly. Examination of the airplane revealed that no fuel was visible in the right fuel tank and that about 1/2 inch of fuel was visible in the left fuel tank. The carburetor's float bowl was empty of fuel. The carburetor heat and mixture control cables were broken, and they were not attached to their respective points. The end of the mixture control cable was found wrapped around the attachment's bolt to connect it to the mixture control arm. The mixture control arm was removed from the carburetor; the spring under the control arm appeared intact. The cable's break, located under the bolt head, had both a dull and a shiny section, indicating that it may have been partially fractured for some time. A broken mixture control cable or an inadequate fuel supply can cause a loss of engine power due to fuel starvation.

Factual narrative

On January 17, 2015, about 1630 central standard time, a Mooney M20C airplane, N6474U, lost engine power shortly after departing a private airstrip in Lonoke County, Arkansas. The airline transport rated pilot was not injured and the airplane was substantially damaged. The airplane was registered to and operated by a private individual under the provisions of the 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time of the accident. The pilot reported that he performed an engine a run-up with the engine instruments; everything was in the normal operating range. Just after takeoff, he retracted the gear, and shortly thereafter, the engine lost power. He immediately applied carburetor heat; however, he only got a moment of partial power back. The pilot then selected a nearby highway for the forced landing. The airplane collided with several trees just short of the highway, before coming to rest upright on its belly. The responding Federal Aviation Administration inspector, noted extensive damage to the right wing, and forward section of the fuselage. A inspection of the fuel tank filler ports revealed, fuel was not visible in the right fuel tank and about half-inch of fuel was visible in the left fuel tank. An examination of the engine was conducted by the NTSB IIC. The engine was rotated by hand; a thumb compression test was done on each cylinder. Engine and valve train continuity was confirmed to the accessory drive section. The magnetos produced a spark at each sparkplug terminal. The electric-driven fuel pump operated, when electrical power was supplied. Both the carburetor heat and mixture control cables were broken and not attached to their respective points. For attachment to the carburetor's mixture control arm, the cable end had been wrapped around the attachment's bolt. The cable's break, which was located under the bolt head, had both a dull and a shiny section. The mixture control arm attached to the carburetor, and would remain at whichever position it was placed. The arm was removed from the carburetor and the spring under the mixture control arm appeared intact. The carburetor float bowl drain plug was removed; no fuel exited the bowl. At 1658, the automated weather reported station located about 15 miles west of the accident site, recorded a temperature of 57 degrees F and a dew point of 36 degrees F. A review of the carburetor icing probability chart, indicated that the airplane was operating in an area that was associated with a risk of carburetor ice at glide power setting.

Aircraft

Registration
N6474U
Reported as
Mooney M20C
Category
Airplane
Serial number
2221
Built
1962
Engine
Lycoming O-360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 28, 2014
Departed
Lonoke county, AR
Destination
Lonoke county, AR

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
30
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Seat
Left
Restraint
Lap only
Flight hours
6,000 total · 200 in this make and model · 3,500 as pilot in command · 150 in the last 90 days · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 36 °F
Altimeter
29.95 inHg
Observed at
KLEF, 15 nm away

Docket · 2

The files NTSB released with the investigation on June 24, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.9 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.