Overview
A border patrol pilot was conducting routine patrol duties over rolling terrain at an estimated altitude of about 500 feet above ground level. The flight was normal until the aircraft began a right turn to cross a ridge.
Sequence of Events
While making a right turn and crossing a ridge, the pilot reported that "the bottom fell out," indicating a sudden loss of altitude or lift. The pilot immediately applied full engine power and leveled the wings in an attempt to arrest the descent. However, these actions were insufficient to stop the rate of descent, and the airplane impacted the next ridge line.
Post-Accident Examination
After the accident, investigators examined both the airframe and the engine. The examination did not reveal any anomalies that could have prevented normal flight operations. This suggests that mechanical or structural failure was not a factor in the accident.
Density Altitude
The density altitude at the time of the accident was calculated to be approximately 7,428 feet. Density altitude is a measure of air density corrected for temperature and pressure; higher density altitudes reduce aircraft performance, including engine power and lift, which can affect climb capability and stall margins.