CEN13CA134

NTSB accident investigation · Mooney M20C · Moriarty, NM · January 10, 2013

Accident · No injuriesData collectionFinal report
Date
January 10, 2013, 10:30 local (17:30 UTC)
Place
Moriarty, NM
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N6242UMooney M20C
Defining event
Enroute: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed · report April 3, 2013
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20130110000199A
Case key
86021

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 improper fuel management, which resulted in a loss of engine power during cruise flight due to fuel starvation.

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 managementMooney M20C: 16 casesAll aircraft: 1,695 casesProbable cause
Planning/preparation: fuel planningPersonnel issues › Task performance · PilotMooney M20C: 7 casesAll aircraft: 719 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

Before the accident flight, the pilot purchased 30 gallons of aviation gasoline, following which the fuel gauges indicated near half for each tank. During the accident flight, the pilot flew about 12 minutes south of the departure airport with the left fuel tank selected then turned north to return to the airport. About 5 minutes after turning north, the engine went to idle power. The pilot turned the carburetor heat on and activated the boost pump, and the engine returned to normal cruise power. The pilot indicated that, at this point, she should have switched the fuel selector valve to the right fuel tank but did not. The engine operated at cruise power for about 1 minute then quit completely. The pilot reported that because the airplane was about 1,500 feet above ground level and changing the fuel selector valve requires moving the pilot seat back about 18 inches “with no control of the aircraft,” she decided to perform a forced landing on a farm road directly ahead. During the landing, the right wing struck a fence post, and the airplane subsequently came to rest in a plowed field. Both wings sustained substantial damage. The pilot reported that the accident was caused by fuel starvation and that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot purchased 30 gallons of aviation gasoline (AVGAS) prior to a local flight. The purchased AVGAS was divided between the left and right fuel tanks. The fuel tanks showed a little over one-half on the right and a little less than one-half on the left. The pilot flew about two tenths of an hour south and then turned north back to the airport. About five minutes after turning north, the engine went to idle. The pilot pulled the carb heat on, activated the boost pump, and the engine returned to normal cruise power. The pilot indicated, "At this point I should have switch to the right tank." The engine ran about one minute then quit completely. The airplane was about 1,500 feet above ground level. The pilot reported that "the changing of the fuel select valve requires the pilot to move the seat back about 18 in[ches] with no control of the aircraft, I thought a controlled forced landing better than an uncontrolled one." The pilot reported that the accident was caused by fuel starvation and that there were no preaccident mechanical failures or malfunctions of the airplane.

Aircraft

Registration
N6242U
Reported as
Mooney M20C
Category
Airplane
Serial number
2081
Airframe hours
5,500
Engine
Lycoming O-360-A1D, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 17, 2012
Departed
0E0 · Moriarty, NM
Destination
Moriarty, NM

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
80
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
October 23, 2011
Seat
Left
Flight hours
2,357 total · 2,000 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
37 °F, dew point 14 °F
Altimeter
30.01 inHg
Observed at
0E0, 13 nm away

Docket · 1

The files NTSB released with the investigation on February 12, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.3 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.