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NTSB Report
September 5, 2010 · Weber ACRO Sport II · N819WW
Plum City, WI
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
September 5, 2010
Injury Outcomes
2 injuries (2 minor injuries)
Location
Plum City, WI
Aircraft
Weber ACRO Sport II
Tail Number
N819WW
Operator
Stephen J Weber
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CEN10CA525
According to the pilot, he departed with approximately 10 gallons of fuel onboard the experimental amateur-built airplane. About 20 minutes into the cross-country flight, the airplane's engine lost power and the pilot performed a forced landing to rolling terrain. A postaccident examination of the airplane and engine revealed no mechanical malfunctions or failures that would have precluded normal operation. Additionally, the on-scene inspection revealed that the fuel system was intact and that the fuel sight gauge indicated that the fuel level was low.
NTSB Probable Cause
The pilot’s improper fuel planning, which resulted in a loss of engine power due to fuel exhaustion.
Full Narrative
The pilot indicated that the experimental amateur-built biplane lost engine power during cruise about 20 minutes into a cross-country flight. The terrain where the airplane sustained substantial damage to its lower left spar during an off field landing consisted of rolling hills. He reported that he departed with approximately 10 to 11 gallons of 100 low lead aviation gasoline. The pilot’s accident report stated the airplane remained intact following the accident. An on-scene examination of the wreckage revealed no pre-impact anomalies and the fuel system was intact. The indicated on-scene fuel level was in a red colored range on the fuel sight gauge.
Flight
Event TypeAccident
Event Time08:45 CDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftWeber ACRO Sport II
Tail NumberN819WW
Aircraft CategoryAir
DamageSubstantial
OperatorStephen J Weber
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-B2A · Reciprocating · 160
Seats2
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 58 · First Class · Minor
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 3 kt
Visibility7 sm
CeilingOvercast 6500 ft
Temperature / Dew Point54 / 54
Altimeter29.92 inHg
Observation Time13:35
Weather SourceWFAC