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NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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April 11, 1991 · Brault Glasair SH2F · N1490

Green Bay, WI

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 11, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Green Bay, WI
Aircraft
Brault Glasair SH2F
Tail Number
N1490
Operator
R G Brault
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI91DEP04

THE AIRCRAFT WAS MANEUVERING IN ATTITUDES THAT IMPOSED NEGATIVE 'G' FORCES ON THE AIRFRAME WHEN ENGINE POWER WAS LOST. ATTEMPTS TO RESTART THE ENGINE WERE UNSUCCESSFUL. AN EMERGENCY LANDING WAS INITIATED TO A PAVED ROAD. THE AIRCRAFT STRUCK A WIRE ON APPROACH AND SUBSEQUENTLY IMPACTED A DITCH. EXAMINATION REVEALED THAT THE FUEL PICKUP LINE WAS CAPABLE OF UNPORTING WITH LOW FUEL LEVEL DURING NEGATIVE 'G' MANEUVERS. TOTAL FUEL CAPACITY WAS 34.5 GALLONS. APPROXIMATELY 10 GALLONS OF FUEL WERE PRESENT WHEN THE ENGINE POWER FAILURE OCCURRED.

NTSB Probable Cause

THE PILOT IN COMMAND'S FAILURE TO REFUEL THE AIRCRAFT PRIOR TO DEPARTURE. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS THE UNPORTING OF THE FUEL PICK UP LINE IN FUEL TANK DURING ABRUPT OR NEGATIVE 'G' MANEUVERS.

Full Narrative

THE AIRCRAFT WAS MANEUVERING IN ATTITUDES THAT IMPOSED NEGATIVE 'G' FORCES ON THE AIRFRAME WHEN ENGINE POWER WAS LOST. ATTEMPTS TO RESTART THE ENGINE WERE UNSUCCESSFUL. AN EMERGENCY LANDING WAS INITIATED TO A PAVED ROAD. THE AIRCRAFT STRUCK A WIRE ON APPROACH AND SUBSEQUENTLY IMPACTED A DITCH. EXAMINATION REVEALED THAT THE FUEL PICKUP LINE WAS CAPABLE OF UNPORTING WITH LOW FUEL LEVEL DURING NEGATIVE 'G' MANEUVERS. TOTAL FUEL CAPACITY WAS 34.5 GALLONS. APPROXIMATELY 10 GALLONS OF FUEL WERE PRESENT WHEN THE ENGINE POWER FAILURE OCCURRED.

Flight

Event TypeAccident
Event Time10:27 CDT
Nearest AirportAustin Straubel (0nm N)
Runway0
Runway Length7699 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBrault Glasair SH2F
Tail NumberN1490
Aircraft CategoryAir
DamageSubstantial
OperatorR G Brault
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · I0-360 · Reciprocating · 180
Seats2

People & Injuries

Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 59 · Third Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingOvercast 25000 ft
Temperature / Dew Point39 C / 25 C
Altimeter0
Weather SourcePILO

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Appendix: Source Data