For many pilots, the first exposure to the benefits of an angle-of-attack (AOA) indicating system comes during their first simulator session toward a business jet or airliner type rating. Because fewer pilots are entering the world of professional flying via the military–which actively uses AOA systems–and general aviation training airplanes are rarely AOA equipped, new civilian pilots get little exposure to AOA indicators and their safety benefits.
Angle of attack
EAA AirVenture 2013 is barely 48 hours old, but already some definite themes are emerging around the show. Among them is greater discussion regarding use of angle of attack (AoA) indicators in general aviation (GA) aircraft.
The European Aviation Safety Agency issued an emergency airworthiness directive December 4 for the angle of attack (AOA) probes of both the Airbus A330 and A340. The AD, which became effective December 6, results from an incident in which an A330 in the climb experienced a blockage of all AOA probes, leading to autopilot disconnection and activation of the alpha (angle of attack) protection system when Mach number increased.
The FAA has issued a proposed advisory circular that would, as a core principle, include “emphasis of ‘reduce angle of attack’ response as the primary response for stall events.” According to the proposed AC, “The primary goal of this proposed advisory circular is to provide training, testing and checking recommendat