NTSB Identification: DEN85LA024.
The docket is stored on NTSB microfiche number 26305.
Accident occurred Thursday, November 08, 1984 in WILLISTON, ND
Aircraft: CESSNA 185C, registration: N5831T
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 COLLIDED WITH A BRIDGE DURING AN ABORTED TAKEOFF AFTER FAILING TO GET AIRBORNE. THE PLT ABORTED THE TAKEOFF BUTTHE ACFT FAILED TO STOP IN TIME TO AVOID A COLLISION WITH A RAILROAD BRIDGE ABUTMENT MADE OF CONCRETE. THE PLT STATED THAT THE ACFT HAD BEEN SUBJECTED TO SUB-FREEZING TEMPS WITH WATER INSIDE THE PONTOONS. THE SWELLING FROM THE FREEZING WATER (ICE) COMPROMISED THE FLOATS WHICH DEVELOPED LEAKS OF SEVERE NATURE; ENOUGH TO ALLOW THE ACFT TO SINK IN AN EST TWO HOURS. THE REASON THE ACFT DID NOT SINK WHEN LEFT UNATTENTED FOR 2 WKS WAS BECAUSE IT WAS AGROUND. WHEN THE PLT PUMPED THE WATER (NO ICE INSIDE ACCORDING TO HIM) OUT AND LAUNCHED THE ACFT HE MADE NO FURTHER PRE-FLT CHECKS BUT IMMEDIATELY STARTED A TAKEOFF TAXI.

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

AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND

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

JUDGMENT..POOR..PILOT IN COMMAND

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

ABORTED TAKEOFF..DELAYED..PILOT IN COMMAND


Contributing Factors

LANDING GEAR,FLOAT ASSEMBLY..BUCKLED


Contributing Factors

LANDING GEAR,FLOAT ASSEMBLY..LEAK


Contributing Factors

LANDING GEAR,FLOAT ASSEMBLY..PREVIOUS DAMAGE

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