NTSB Identification: ATL86FA041.
The docket is stored on NTSB microfiche number 29807.
Accident occurred Sunday, December 15, 1985 in LANGHORNE, PA
Aircraft: MOONEY M20K, registration: N231A
Injuries: 1 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.

ACFT COLLIDED WITH MARKED BUT UNLIGHTED TRANSMISSION LINES 670 FT FM RWY THRESHOLD. THE LINES ARE 81 FT ABOVE THE THRESHOLD ELEVATION AND ARE MARKED BUT UNLIGHTED. THEY ARE ALSO 1193 FT FROM THE DISPLACED THRESHOLD. THE PILOT DID NOT HAVE A CURRENT MEDICAL OR PILOT CERTIFICATE. INSULIN AND CHLOROTHIAZIDE WERE FOUND IN THE PILOTS PERSONAL EFFECTS WITNESSES DID NOT RECALL SEEING ACFT LDG LIGHTS DISPLAYED PRIOR TO THE LINE COLLISION ALTHOUGH EVIDENCE OF ELECTRICAL AVAILABILITY WAS FOUND.

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

ALTITUDE..BELOW..PILOT IN COMMAND

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

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT IN COMMAND

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

PROPER GLIDEPATH..NOT FOLLOWED..PILOT IN COMMAND

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

CLEARANCE..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

OBJECT..WIRE,TRANSMISSION(MARKED)


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

LANDING LIGHTS..NOT USED..PILOT IN COMMAND

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