On February 13, 1994, a Piper PA-28R-180 (registration N3775T) operated by Donald D. Brannon was involved in an aviation accident near Lake Tahoe, CA. Investigators recorded the probable cause as: THE PILOT'S IMPAIRMENT OF JUDGMENT AND PERFORMANCE DUE TO DRUGS, WHICH LED TO HIS FAILURE TO FOLLOW THE RECOMMENDED DEPARTURE PROCEDURE, AND HIS FAILURE TO MAINTAIN SUFFICIENT ALTITUDE/CLEARANCE FROM RISING MOUNTAINOUS TERRAIN. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A student pilot took off from South Lake Tahoe Airport and collided with rising terrain south of the airport. The pilot had been advised of turbulence. Toxicology tests showed cocaine metabolites in the pilot's blood and urine.
Departure and Terrain Collision
A student pilot departed South Lake Tahoe Airport from Runway 18 and requested a straight out departure toward rapidly rising mountainous terrain. The recommended departure procedure was to proceed about 1.5 miles south to a golf course and then climb in right turns to 7,500 feet before departing the area. The pilot had been advised of reported turbulence with up and downdrafts in the Tahoe Basin. The aircraft collided with rising terrain at an elevation of about 9,400 feet mean sea level, located approximately 6 miles south of the airport.
Toxicology Findings
After the accident, a plastic straw with cocaine residue was found in the airplane. A toxicology test of the pilot's blood performed by the county medical examiner showed it was positive for benzoylecgonine at a level of 0.223 μg/mL. Additional blood tests conducted at the Civil Aerospace Medical Institute (CAMI) revealed 0.181 μg/mL of benzoylecgonine and 0.050 μg/mL of ecgonine methyl ester. Tests of the pilot's urine showed 0.032 μg/mL of cocaine, 6.048 μg/mL of benzoylecgonine, and 0.834 μg/mL of ecgonine methyl ester.
What happened in the 13 Feb 1994 Piper PA-28R-180 accident near Lake Tahoe, CA?
A student pilot took off from South Lake Tahoe Airport and collided with rising terrain south of the airport. The pilot had been advised of turbulence. Toxicology tests showed cocaine metabolites in the pilot's blood and urine.
What aircraft was involved and where did it happen?
The accident on 13 Feb 1994 involved a Piper PA-28R-180, registration N3775T, operated by Donald D. Brannon, at Lake Tahoe, CA.
What was the probable cause of the accident?
THE PILOT'S IMPAIRMENT OF JUDGMENT AND PERFORMANCE DUE TO DRUGS, WHICH LED TO HIS FAILURE TO FOLLOW THE RECOMMENDED DEPARTURE PROCEDURE, AND HIS FAILURE TO MAINTAIN SUFFICIENT ALTITUDE/CLEARANCE FROM RISING MOUNTAINOUS TERRAIN. FACTORS RELATED TO THE ACCIDENT WERE: THE TERRAIN AND WEATHER CONDITIONS.
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