NTSB Identification: CHI86FA194.
The docket is stored on NTSB microfiche number 32403.
Accident occurred Saturday, August 02, 1986 in OSHKOSH, WI
Aircraft: PIPER PA-24-250, registration: N5713P
Injuries: 2 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE AIRCRAFT RAN OUT OF FUEL AFTER 3+41 HOURS OF FLIGHT. THE PILOT STATED THAT HE WAS SURE THE TANKS WERE FULL ON TAKEOFF. FLIGHT PLANNING AND A DOCUMENTED CONSERVATIVE FUEL BURN RATE INDICATED THAT THE AIRCRAFT SHOULD HAVE BEEN ABLE TO REMAIN AIRBORNE FOR AT LEAST 4+37 HOURS (13 GALLONS PER HOUR DIVIDED BY THE ACFT FUEL CAPACITY OF 60 GALLONS). AN EXAMINATION OF THE FUEL BLADDER CELLS REVEALED SEVERAL LOOSE RETAINING CLIPS AND GENERAL COLLAPSING AND DISTORTION OF BOTH CELLS. ACCORDING TO THE LOGBOOK THE AIRWORTHINESS DIRECTIVE TO REMEDY THIS PROBLEM WAS COMPLIED WITH 41 FLIGHT HOURS PRIOR TO THE ACCIDENT.

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

MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..INADEQUATE..OTHER MAINTENANCE PERSONNEL

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

FUEL SYSTEM,TANK..DISTORTED


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

ENGINE INSTRUMENTS,FUEL QUANTITY GAGE..FALSE INDICATION


Contributing Factors

ACFT/EQUIP,INADEQUATE AIRCRAFT COMPONENT..MANUFACTURER


Contributing Factors

FUEL SYSTEM,TANK..SEPARATION

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