Examining HFACS The airplane descended from about 650 to 350 ft as it circled the runway. 760ft was the minimum approach altitude (Departure from Controlled Flight Trans-Pacific Air Charter, LLC Learjet 35A, N452DA, 2017, p. 1-30). The enhanced ground proximity warning system (EGPWS) issued an aural five hundred feet alert, which the PIC told the SIC to disregard (Departure from Controlled Flight Trans-Pacific Air Charter, LLC Learjet 35A, N452DA, 2017, p. 1-30). 4