DERBY, KS, USA
N6951D
PIPER PA-22-150
THE PLT WAS PACTICING LANDINGS & STOPPED AFTER EACH TOUCHDOWN. AFTER APRX THE 5TH LANDING, THE BRAKES FAILED TO OPERATE & THE ACFT CONTINUED OFF THE END OF THE RWY. BEFORE STOPPING, THE NOSE GEAR WENT IN A DITCH & COLLAPSED, AND THE ACFT NOSED OVER. THE PLT STATED THAT HE COULD NOT SEE THE DITCH BEFORE THE ENCOUNTER SINCE IT WAS COVERED WITH VEGETATION (GRASS). AN INVESTIGATION REVEALED THAT THE LEFT BRAKE BLEEDER PORT O-RING WAS IMPROPERLY SEATED ALLOWED HYDRAULIC FLUID TO LEAK WITH EACH APPLICATION OF THE BRAKES. THE HYDRAULIC RESERVOIR WAS FOUND TO BE EMPTY.
Source: NTSB Aviation Accident Database
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