WPR13CA425

NTSB accident investigation · Cessna M337B · Spanish Fork, UT · September 12, 2013

Accident · No injuriesData collectionFinal report
Date
September 12, 2013, 14:30 local (20:30 UTC)
Place
Spanish Fork, UT
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N87653Cessna M337B
Defining event
Maneuvering-low-alt flying: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report February 4, 2014
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
88142

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 failure to properly manage fuel which resulted in fuel exhaustion and subsequent loss of power to the forward engine.

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 managementCessna M337B: 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 reported that on the day of the accident, he elected to fly with a light, and slightly uneven, load of fuel to accommodate for the extra equipment and people onboard. During the low altitude flight, the pilot was not transferring fuel from the right wing fuel tanks to the left wing fuel tanks. Subsequently, the left wing fuel tanks ran empty and the forward engine lost power. The pilot elected to land in a nearby corn field. During the landing, the airplane's forward engine firewall sustained substantial damage. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engines that would have precluded normal operation.

Factual narrative

The pilot reported that on the day of the accident, he elected to fly with a light, and slightly uneven, load of fuel to accommodate for the extra equipment and people onboard. During the low altitude flight, the pilot was not transferring fuel from the right wing fuel tanks to the left wing fuel tanks. Subsequently, the left wing fuel tanks ran empty and the forward engine lost power. The pilot elected to land in a nearby corn field. During the landing, the airplane's forward engine firewall sustained substantial damage. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engines that would have precluded normal operation.

Aircraft

Registration
N87653
Reported as
Cessna M337B
Category
Airplane
Serial number
337M0222
Built
1968
Airframe hours
5,514
Engines
Continental IO-360, 210 horsepower, reciprocatingContinental IO-360, 210 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial observation · Part 91
Operator
Artemis Inc
Registered owner
Artemis Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · August 6, 2013
Departed
U77 · Spanish Fork, UT
Destination
U77 · Spanish Fork, UT
Airport
U77 · Spanish Fork Airport

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
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
October 5, 2011
Seat
Left
Restraint
Lap only
Flight hours
15,000 total · 560 in this make and model · 7,000 as pilot in command · 19 in the last 90 days · 13 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
340° at 10 knots
Visibility
15 statute miles
Lowest ceiling
8,000 ft broken
Temperature
59 °F, dew point 54 °F
Altimeter
30.18 inHg
Observed at
PVU, 5 nm away

Docket · 2

The files NTSB released with the investigation on January 9, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 MB in all.