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Aviation safety reports, made easier to study

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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NTSB Report

July 28, 1992 · Beech H35 · N7957D

Baraboo, WI

Overview

Report Status
Probable Cause
Event Type
Accident
Date
July 28, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Baraboo, WI
Aircraft
Beech H35
Tail Number
N7957D
Operator
David R & Wanda L Swanson
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI92LA213

THE PILOT WAS PERFORMING A NIGHT TAKEOFF WHEN THE COCKPIT ENTRANCE DOOR OPENED. THE PILOT STATED HE WAS UNABLE TO CLOSE THE DOOR AND DECIDED TO ABORT THE TAKEOFF. ACCORDING TO THE PILOT, THE BRAKES DID NOT FUNCTION PROPERLY DURING HIS ATTEMPT TO STOP THE AIRPLANE. THE AIRPLANE DEPARTED THE DEPARTURE END OF THE RUNWAY AND COLLIDED WITH TREES AND FENCE POSTS. AN ON-SCENE INVESTIGATION REVEALED THE HYDRAULIC SYSTEM WAS MECHANICALLY SOUND. THE BRAKE SYSTEM HYDRAULIC FLUID RESERVOIR WAS FOUND EMPTY OF FLUID. EVIDENCE OF LEAKING BRAKE FLUID ON THE AIRFRAME AND LANDING GEAR LEG WAS NOT OBSERVED.

NTSB Probable Cause

INADEQUATE MAINTENANCE SERVICE AND AIRCRAFT PREFLIGHT BY THE PILOT. A FACTOR CONTRIBUTING TO THIS ACCIDENT WAS A PARTIAL FAILURE OF THE BRAKE SYSTEM.

Full Narrative

THE PILOT WAS PERFORMING A NIGHT TAKEOFF WHEN THE COCKPIT ENTRANCE DOOR OPENED. THE PILOT STATED HE WAS UNABLE TO CLOSE THE DOOR AND DECIDED TO ABORT THE TAKEOFF. ACCORDING TO THE PILOT, THE BRAKES DID NOT FUNCTION PROPERLY DURING HIS ATTEMPT TO STOP THE AIRPLANE. THE AIRPLANE DEPARTED THE DEPARTURE END OF THE RUNWAY AND COLLIDED WITH TREES AND FENCE POSTS. AN ON-SCENE INVESTIGATION REVEALED THE HYDRAULIC SYSTEM WAS MECHANICALLY SOUND. THE BRAKE SYSTEM HYDRAULIC FLUID RESERVOIR WAS FOUND EMPTY OF FLUID. EVIDENCE OF LEAKING BRAKE FLUID ON THE AIRFRAME AND LANDING GEAR LEG WAS NOT OBSERVED.

Flight

Event TypeAccident
Event Time22:41 CDT
Nearest AirportBaraboo-Dell Muni (1nm N)
Runway1
Runway Length4900 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech H35
Tail NumberN7957D
Aircraft CategoryAir
DamageSubstantial
OperatorDavid R & Wanda L Swanson
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-470-G · Reciprocating · 240
Seats4

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 30 · Third Class

Conditions

ConditionsVMC
LightDark Night
Wind10° @ 2 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point64 F / 57
Altimeter29.00 inHg
Observation Time02:00
Weather SourceWFAC

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Appendix: Source Data