NTSB Identification: LAX87LA022.
The docket is stored on NTSB microfiche number 32841.
Accident occurred Monday, October 20, 1986 in BIG BEAR CITY, CA
Aircraft: PIPER PA-22-160, registration: N9206D
Injuries: 4 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT VEERED OFF RWY 7 DURING LANDING ROLL. THE PLT INDICATED THE ACFT VEERED TO THE RIGHT. THERE WAS A SINGLE RUBBER SKID MARK APRX 150 FT LONG FOUND ON THE RWY. THE WIND WAS REPORTED BY ANOTHER PLT TO BE 'DOWN THE RUNWAY AT 10-15 KNOTS.' EXAMINATION OF THE ACFT REVEALED THE LEFT BRAKE MASTER CYLINDER FAILED. METAL PARTICLES HAD CONTAMINATED THE BRAKE FLUID. VISUAL INSPECTION OF THE CYLINDER WALLS SHOWED SIGNS OF DETERIORATION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LANDING GEAR,NORMAL BRAKE SYSTEM..WORN

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

BRAKES(NORMAL)..NOT POSSIBLE..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DIRECTIONAL CONTROL..NOT POSSIBLE..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LANDING GEAR,NORMAL BRAKE SYSTEM..FAILURE,PARTIAL


Contributing Factors

FLUID,HYDRAULIC..CONTAMINATION

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