Aviation Accident Summaries

Aviation Accident Summary CHI91FA259

GUIDE ROCK, NE, USA

Aircraft #1

N5145P

PIPER PA-24-250

Analysis

THE PILOT WHO WAS NOT INSTRUMENT RATED WAS TRYING TO REMAIN VFR ON TOP WHEN HE ENCOUNTERED IMC AT 17,500 FEET. AIRCRAFT ENTERED AN UNCONTROLLED DESCENT AFTER THE PILOT TRIED TO MANEUVER TO REMAIN IN VMC. THE RIGHT WING SEPARATED FROM THE AIRCRAFT DURING DESCENT. THE PILOT WAS ABOVE 14,000 FEET FOR ONE HOUR. THE AIRCRAFT WAS NOT OXYGEN EQUIPPED, AND NO EVIDENCE OF PORTABLE OXYGEN WAS FOUND. THERE WAS NO RECORD OF A PRELFIGHT WEATHER BRIEFING. THE PILOT GOT AN INFLIGHT WEATHER BRIEFING 1.5 HOURS BEFORE THE CRASH IN WHICH VFR WAS NOT RECOMMENDED, AND A ROUTE OF FLIGHT TO AVOID THE WEATHER WAS SUGGESTED. A SECOND INFLIGHT WEATHER BRIEFING WAS OBSTAINED 20 MINUTES BEORE THE CRASH IN WHICH A ROUTE OF FLIGHT TO AVOID THE WEATHER WAS AGAIN SUGGESTED. PILOT CONTINUED UNTIL HE WAS IMC.

Probable Cause and Findings

SPATIAL DISORIENTATION, AND EXCEEDING THE DESIGN LIMITS OF THE AIRCRAFT. FACTORS RELATED TO THE ACCIDENT ARE INADEQUATE PREFLIGHT PLANNING, VFR FLIGHT INTO IMC, FLIGHT WEATHER AVOIDANCE ASSISTANCE NOT FOLLOWED, EXCESSIVE ALTITUDE, PHYSICAL IMPAIRMENT (ANOXIA/HYPOXIA), AND LACK OF TOTAL INSTRUMENT TIME.

 

Source: NTSB Aviation Accident Database

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