PIPER PA-36-285 near Silverton, TX — 2008-10-18

Probable cause

The pilot's failure to maintain clearance from a transmission wire.

NTSB narrative

During an aerial application flight, the airplane, piloted by a commercial pilot, contacted a transmission wire during an undetermined phase of flight. The vertical stabilizer separated from the airplane and was not recovered. Aircraft control was not possible and the airplane subsequently impacted terrain. The pilot was seriously injured. Examination of the wreckage revealed damage to the anti-snag deflector cable and vertical stabilizer consistent with a wire strike. Displaying signs of wear, the pilot's restraint system failed in two locations resulting in additional injury to the pilot.

Analysis

Primary failure mode

Mechanical failure

First missed decision gate

Replace worn safety belts to ensure pilot restraint during flight.

NTSB coding

• Low altitude operation/event · Maneuvering-low-alt flying
• Attention / Monitoring

Evidence available

• Photos
• 6 docket documents

Docket documents6

• Other Pertinent Forms and Reports: Piper service manualform
• Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1form
• Release of Aircraft Wreckage, NTSB Form 6120.15form
• Statement of Party Representatives to NTSB Investigationinterview
• Photo 2. Pilot Restraintphotos
• Photo: Mounting platephotos

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