NTSB Identification: CHI86LA021.
The docket is stored on NTSB microfiche number 29533.
Accident occurred Wednesday, October 30, 1985 in BANGOR, MI
Aircraft: Eagle Aircraft Co. DW-1, registration: N8807Z
Injuries: 1 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 NOSED OVER AFTER LANDING ON A GRASS LANDING STRIP. THE PILOT STATED THE TAIL CAME UP AND THE AIRCRAFT FLIPPED OVER ON ITS BACK AFTER LEFT BRAKE WAS APPLIED. AN EXAMINATION OF THE LANDING GEAR AND BRAKES REVEALED THAT THE RIGHT BRAKE WAS RELEASED BUT THE LEFT BRAKE WAS STILL APPLIED AND THE LEFT WHEEL LOCKED. THE LEFT BRAKE LINE WAS BLED REDUCING PRESSURE AND RELEASING THE LEFT BRAKE. EXAMINATION OF OF THE MASTER BRAKE CYLINDER REVEALED THAT THE CHECK VALUE SPRING DID NOT RELEASE ON THE LEFT SIDE WHEN BRAKE PEDAL PRESSURE WAS REMOVED.

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

LANDING GEAR,NORMAL BRAKE SYSTEM..PRESSURE EXCESSIVE

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