CEN12LA074

NTSB accident investigation · Beech S35 · Elkhart Lake, WI · November 15, 2011

Accident · No injuriesLimited investigationFinal report
Date
November 15, 2011, 10:40 local (16:40 UTC)
Place
Elkhart Lake, WI
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N5858SBeech S35
Defining event
Enroute: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report March 28, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20111115027199A
Case key
82362

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

Findings · 3

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 managementBeech S35: 3 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelBeech S35: 3 casesAll aircraft: 1,695 casesProbable cause
Engine (reciprocating)Aircraft › Aircraft power plant · FailureBeech S35: 3 casesAll aircraft: 497 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 departed for the planned 1 hour, 40 minute flight with 58 total gallons of fuel. While in cruise flight at 2,500 feet mean sea level, the engine suddenly lost power. The pilot noticed no anomalies prior to the loss of engine power. After switching fuel tanks and several unsuccessful engine restart attempts, the pilot executed a forced landing to a field. The pilot stated that, at the time of the accident, he estimated that the left and right fuel tanks were about half-full of fuel. Postaccident examination of the airplane showed about 35 gallons of fuel in the left fuel tank and no fuel in the right fuel tank. The fuel selector was selected to the right tank. The right fuel tank was intact, and the left fuel tank bladder contained a tear, in which the fuel drained until it reached a level below the tear. No fuel was in the fuel lines from the right tank and through the engine fuel system, which was consistent with fuel starvation.

Factual narrative

On November 15, 2011, at 1040 central standard time, a Beech S35 single-engine airplane, N5858S, sustained substantial damage when it impacted terrain during a forced landing following a loss of engine power near Elkhart Lake, Wisconsin. The private pilot and passenger were not injured. The airplane was registered to N5858S, LLC, Brookfield, Wisconsin, and operated by the pilot. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The flight departed the Sawyer International Airport (SAW), Marquette, Michigan, at 0920, and was destined for Capitol Airport (02C), Brookfield, Wisconsin. According to the pilot, he departed for the planned 1 hour and 40 minute flight with 58 total gallons of fuel. While in cruise flight at 2,500 feet mean sea level, the engine suddenly lost power. The pilot noticed no anomalies prior to the loss of engine power. After switching fuel tanks and several unsuccessful engine restart attempts, the pilot executed a forced landing to a field. During the forced landing, the airplane struck trees adjacent to the field, and the airplane landed with the landing gear partially extended. The airplane impacted terrain and came to rest upright. The pilot stated that at the time of the accident, he estimated the left and right fuel tanks were approximately 1/2 full of fuel. Postaccident examination of the airplane showed the firewall and forward fuselage were bent. After recovery from the field, approximately 35 gallons of fuel was noted in the left fuel tank and no fuel was noted in the right fuel tank. The fuel selector was found in the right tank position. The right fuel tank was intact, and the left fuel tank bladder contained a tear, in which the fuel drained until it reached a level below the tear. No fuel was noted in the fuel lines from the right tank and through the engine fuel system. When the fuel selector was turned to the left tank, fuel flowed out of the fuel selector valve. When the fuel selector was turned to the right tank, no fuel was noted.

Aircraft

Registration
N5858S
Reported as
Beech S35
Category
Airplane
Serial number
D-7750
Engine
Cont Motor IO-520-BA, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 6, 2011
Departed
SAW · Marquette, MI
Destination
02C · Brookfield, WI

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
54
Injuries
None
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
October 8, 2010
Seat
Left
Flight hours
3,038 total · 2,143 in this make and model · 2,889 as pilot in command · 33 in the last 90 days · 6 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 20 knots, gusting 25
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F

Docket · 2

The files NTSB released with the investigation on February 8, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 365 KB 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.