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NTSB Report
August 23, 1992 · North American NA-64 · N3201U
Bakersfield, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 23, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Bakersfield, CA
Aircraft
North American NA-64
Tail Number
N3201U
Operator
Albert Pemberton
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX92LA363
THE PILOT SAID THAT DURING LANDING THE AIRCRAFT BEGAN TURNING TO THE LEFT. HE ATTEMPTED TO CORRECT THE TURNING TENDENCY WITH RIGHT RUDDER AND BRAKE APPLICATION; HOWEVER, THE AIRCRAFT SUDDENLY GROUND LOOPED AND COLLAPSED THE MAIN LANDING GEAR. THE BRAKES WERE EXAMINED AND BRAKE FLUID WAS OBSERVED ON THE BRAKE DRUM AND LINING. DISASSEMBLY OF THE LEFT BRAKE CYLINDER REVEALED DEEP CORROSION PITS ON THE INTERIOR SURFACE OF THE CYLINDER. DUE TO THE MANUFACTURE DATE OF THE AIRPLANE, VEGETABLE BASE (AUTOMOTIVE) BRAKE FLUID IS USED. IT WAS REPORTED THAT UNLIKE MINERAL BASE BRAKE FLUID USED IN MODERN AIRCRAFT, 'VEGETABLE BASE FLUID WILL NOT TOLERATE HIGH TEMPERATURE AND WILL CAUSE A BRAKE LINING TO 'GRAB' THE DRUM DURING HEAVY BRAKE APPLICATION.'
NTSB Probable Cause
LEAKAGE OF BRAKE FLUID FROM AN UNKNOWN SOURCE ONTO THE BRAKE LINING AND DRUM.
Full Narrative
THE PILOT SAID THAT DURING LANDING THE AIRCRAFT BEGAN TURNING TO THE LEFT. HE ATTEMPTED TO CORRECT THE TURNING TENDENCY WITH RIGHT RUDDER AND BRAKE APPLICATION; HOWEVER, THE AIRCRAFT SUDDENLY GROUND LOOPED AND COLLAPSED THE MAIN LANDING GEAR. THE BRAKES WERE EXAMINED AND BRAKE FLUID WAS OBSERVED ON THE BRAKE DRUM AND LINING. DISASSEMBLY OF THE LEFT BRAKE CYLINDER REVEALED DEEP CORROSION PITS ON THE INTERIOR SURFACE OF THE CYLINDER. DUE TO THE MANUFACTURE DATE OF THE AIRPLANE, VEGETABLE BASE (AUTOMOTIVE) BRAKE FLUID IS USED. IT WAS REPORTED THAT UNLIKE MINERAL BASE BRAKE FLUID USED IN MODERN AIRCRAFT, 'VEGETABLE BASE FLUID WILL NOT TOLERATE HIGH TEMPERATURE AND WILL CAUSE A BRAKE LINING TO 'GRAB' THE DRUM DURING HEAVY BRAKE APPLICATION.'
Flight
Event TypeAccident
Event Time08:10 PDT
Nearest AirportMeadows Field (0nm N)
Runway30R
Runway Length10857 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftNorth American NA-64
Tail NumberN3201U
Aircraft CategoryAir
DamageSubstantial
OperatorAlbert Pemberton
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsWright · R-975-E3 · Reciprocating · 440
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 59 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind150° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point45 C
Altimeter29.00 inHg
Weather SourcePILO