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NTSB Report
September 30, 1986 · Beech 60 · N3694D
Boulder, CO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 30, 1986
Injury Outcomes
No injuries (2 uninjured)
Location
Boulder, CO
Aircraft
Beech 60
Tail Number
N3694D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN86LA262
AT TOUCHDOWN, THE PLT APPLIED BRAKES NORMALLY. HE NOTICED SOFTENING OF THE LEFT BRAKE PEDAL AND THE ACFT TURNED RIGHT LEAVING THE RWY AND INTERSECTING A TAXIWAY AT APRX A 30 DEGREE ANGLE. THE TAXIWAY HAD A SIX INCH RISE AT THE EDGE WHICH CAUSED THE LEFT MAIN GEAR TO COLLAPSE UPON IMPACT. INVESTIGATION REVEALED THAT THE BRAKE FLUID LEAKED OUT DURING FLT BECAUSE OF A COCKED BRAKE PUCK.
Full Narrative
AT TOUCHDOWN, THE PLT APPLIED BRAKES NORMALLY. HE NOTICED SOFTENING OF THE LEFT BRAKE PEDAL AND THE ACFT TURNED RIGHT LEAVING THE RWY AND INTERSECTING A TAXIWAY AT APRX A 30 DEGREE ANGLE. THE TAXIWAY HAD A SIX INCH RISE AT THE EDGE WHICH CAUSED THE LEFT MAIN GEAR TO COLLAPSE UPON IMPACT. INVESTIGATION REVEALED THAT THE BRAKE FLUID LEAKED OUT DURING FLT BECAUSE OF A COCKED BRAKE PUCK.
Flight
Event TypeAccident
Event Time18:45 MDT
Nearest AirportBOULDER (0nm N)
Runway0
Runway Length4100 ft
Runway Width75 ft
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 60
Tail NumberN3694D
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · TIO-541-E1C4 · Reciprocating · 380
Seats6
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 47 · Third Class
Conditions
ConditionsVMC
LightDark Night
Wind310° @ 13 kt
Visibility25 sm
CeilingBroken clouds 1500 ft
Temperature / Dew Point61 F / 36 C
Altimeter29.00 inHg
Observation Time00:45
Weather SourceWFAC