1991-12-08: Piper PA-34-200T — Neil S. Brown — Pine Valley, CA

Casualties unknown • Pine Valley, CA, US

Probable cause

THE PILOT'S FAILURE TO MONITOR THE PROPER ALTITUDE OVER OBSERABLE RISING TERRAIN. A CONTRIBUTING FACTOR WAS THE PILOT'S ENCOUNTER WITH A STRONG DOWNDRAFT.

— NTSB Determination

Accident narrative

ACCORDING TO THE COMMERCIAL PILOT, DURING THE INITIAL PORTION OF HIS DAYTIME CROSS COUNTRY FLIGHT HE PLANNED TO FLY BENEATH THE BASE OF THE TERMINAL CONTROL AREA (TCA). AFTER CLEARING THE TCA'S LATERAL BOUNDARY, THE PILOT ENCOUNTERED TURBULENCE AND INITIATED A CLIMB FROM HIS 4700 FOOT CRUISE ALTITUDE TO 7500 FEET MSL. UPON REACHING 5300 FEET MSL, A STRONG DOWNDRAFT WAS ENCOUNTERED. THE AIRPLANE LOST ALTITUDE AND COLLIDED WITH A 4800 FOOT MSL HILL.

Frequently asked questions

What happened in the 1991-12-08 Piper PA-34-200T accident near Pine Valley, CA?

ACCORDING TO THE COMMERCIAL PILOT, DURING THE INITIAL PORTION OF HIS DAYTIME CROSS COUNTRY FLIGHT HE PLANNED TO FLY BENEATH THE BASE OF THE TERMINAL CONTROL AREA (TCA). AFTER CLEARING THE TCA'S LATERAL BOUNDARY, THE PILOT ENCOUNTERED TURBULENCE AND INITIATED A CLIMB FROM HIS 4700 FOOT CRUISE ALTITUDE TO 7500 FEET…

What aircraft was involved and where did it happen?

The accident on 1991-12-08 involved a Piper PA-34-200T, registration N36506, operated by Neil S. Brown, at Pine Valley, CA.

What was the probable cause of the accident?

THE PILOT'S FAILURE TO MONITOR THE PROPER ALTITUDE OVER OBSERABLE RISING TERRAIN. A CONTRIBUTING FACTOR WAS THE PILOT'S ENCOUNTER WITH A STRONG DOWNDRAFT.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X18616. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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