NTSB Identification: DEN85FTE01.
The docket is stored on NTSB microfiche number 28613.
Accident occurred Saturday, April 13, 1985 in ERIE, CO
Aircraft: ULTRALIGHT FLIGHT PHANTOM II, registration: NONE
Injuries: 2 Fatal.
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 ULTRALIGHT DESCENDED UNCONTROLLED TO GROUND IMPACT FOLLOWING A FAILURE OF THE OUTBOARD FORWARD WING SUPPORT CABLE/SWAGE. WITNESSES REPORTED THE ULTRALIGHT TURNED FROM NORTH TO SOUTH AND UPON LEVELING OUT, THE LEFT WING SNAPPED UPWARD, THE RIGHT WING COLLAPSED AND THE ULTRALIGHT ENTERED A DIVING TURN TO THE GROUND. POST ACCIDENT TESTS DISCLOSED ALL 4 CABLE ASS'Y WERE MANUFACTURED WITH THE NICROPRESS OVAL M SLEEVE BUT WERE SWAGED WITH THE WRONG SWAGING TOOL (SLIGHTLY LARGER) FOR THE OVAL P. THE CABLE SHOWED EVIDENCE OF FAILURE AT THE NICROPRESS SWAGED CONNECTIONS. TENSILE TESTS REVEALED THE IMPROPERLY SWAGED CONNECTIONS FAILED PREMATURELY DUE TO SLIPPAGE AT THE CONNECTIONS.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:WING,BRACING WIRE..FATIGUE
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE,INSTALLATION..IMPROPER..PILOT IN COMMAND
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