CHI08CA173

NTSB accident investigation · Beech A23A · Sheboygan, WI · June 29, 2008

Accident · Minor injuriesData collectionFinal report
Date
June 29, 2008, 13:35 local (18:35 UTC)
Place
Sheboygan, WI
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N701DWBeech A23A
Defining event
Approach-VFR pattern final: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report August 28, 2008
Report
Approved by Office Director
Parties
Federal Aviation Administration - Milwaukee FSDO
FAA report
20080629840769A
Case key
68577

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 that led to fuel starvation and the loss of engine power. Contributing to the accident was the drainage ditch.

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.

Airport facilities/designEnvironmental issues › Operating environment · Contributed to outcomeBeech A23A: 1 caseAll aircraft: 52 casesProbable cause
Engine fuel and control: fuel controlling systemAircraft › Aircraft power plant · Incorrect use/operationBeech A23A: 1 caseAll aircraft: 59 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 he departed with 30 gallons of fuel onboard. He estimated that the right and left fuel tanks contained 20 gallons and 10 gallons, respectively. He reported that the accident flight was 2 hours 20 minutes in duration. While on final approach the engine lost power and the airplane impacted a 6 foot wide drainage ditch. The airplane sustained damage to the left wing, the lower fuselage structure, and the nose and left landing gear. Post accident inspection of the airplane showed that the right tank was empty and there was fuel present in the left tank. The pilot reported that he planned on a fuel burn rate of 8-1/2 gallons per hour. Using that fuel burn, the calculated fuel consumption for the accident flight was 19.8 gallons. The pilot said the accident could have been prevented if he had switched fuel tanks before the loss of engine power.

Factual narrative

The pilot reported that he departed with 30 gallons of fuel onboard. He estimated that the right and left fuel tanks contained 20 gallons and 10 gallons, respectively. The pilot reported that the accident flight was 2 hours 20 minutes in duration. While on final approach the engine lost power and the airplane impacted a 6 foot wide drainage ditch. The airplane sustained damage to the left wing, the lower fuselage structure, and the nose and left landing gear. Post accident inspection of the airplane showed that the right tank was empty and there was fuel present in the left tank. The pilot reported that he planned on a fuel burn rate of 8-1/2 gallons per hour. Using that fuel burn, the calculated fuel consumption for the accident flight was 19.8 gallons. The pilot said the accident could have been prevented if he had switched fuel tanks before the loss of engine power.

Aircraft

Registration
N701DW
Reported as
Beech A23A
Category
Airplane
Serial number
M-977
Airframe hours
5,065
Engine
Teledyne Continental IO-346-A, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · June 1, 2006
Departed
SBM · Sheboygan, WI
Destination
SBM · Sheboygan, WI
Airport
SBM · Sheboygan County Memorial, runway 31, 5,000 × 75 ft, asphalt

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
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
June 1, 2006
Seat
Left
Flight hours
1,077 total · 400 in this make and model · 1,077 as pilot in command · 3 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 7 knots
Visibility
10 statute miles
Lowest ceiling
2,900 ft broken
Temperature
66 °F, dew point 57 °F
Altimeter
29.72 inHg
Observed at
SBM

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.