NTSB Identification: DEN91FA005.
The docket is stored on NTSB microfiche number 42842.
Accident occurred Sunday, October 07, 1990 in AURORA, CO
Probable Cause Approval Date: 12/14/1992
Aircraft: BEECH P35, registration: N1568S
Injuries: 1 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 PILOT OBTAINED TWO WEATHER BRIEFING THAT INCLUDED FORECAST ICING CONDITIONS. THE FLIGHT PROCEEDED UNEVENTFULLY UNTIL IT ARRIVED IN THE VICINITY OF THE KIOWA VORTAC, NEAR DENVER. APPROACH CONTROL ADVISED THE PILOT OF TWO PIREPS: LIGHT TO MODERATE RIME ICING, AND MODERATE TO SEVERE RIME ICING, REPORTED BY SEVERAL AIRCRAFT. THE PILOT ELECTED TO CONTINUE. THE PILOT REPORTED ACCUMULATING ICE SHORTLY THEREAFTER, AND REQUESTED AN ILS APPROACH TO DENVER'S STAPLETON INTERNATIONAL AIRPORT. WHILE BEING VECTORED, THE PILOT WAS UNABLE TO MAINTAIN SEVERAL ASSIGNED ALTITUDES. HE WAS VECTORED TOWARDS BUCKLEY ANG BASE, BUT CRASHED ABOUT ONE MILE SHORT OF THE RUNWAY. THE SHERIFF REPORTED AT LEAST TWO INCHES OF RIME ICE ON THE LEADING EDGES OF THE WINGS. RUDDERVATOR, AND ANTENNAE. THE AIRPLANE WAS NOT CERTIFIED FOR FLIGHT INTO ICING CONDITIONS, NOR WAS IT EQUIPPED WITH ANY DEICING EQUIPMENT.

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

INADVERTENT STALL. FACTORS WERE HIS DECISION TO DISREGARD IN-FLIGHT WEATHER ADVISORIES, CONTINUED FLIGHT INTO KNOWN ADVERSE WEATHER, AND ICING CONDITIONS AND THE FLIGHT INTO THE KNOWN ADVERSE WEATHER.

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