I have just received a response from a technical expert at Honeywell that was involved in developing the Predictive windshear system installed on most Airbus models in service.
The guidance provided is directly from the NASA study “Airborne Systems Technology Application to the Windshear Threat” that was the guiding document during the develepoment of PWS.
The tech expert advised several issues worth considering primarily
- Turning increases AOA at a point when reduced AOA is the primary factor in increasing windshear survivability.
- PWS events are by nature brief and by the time the aircraft arrives at the highest level of threat the event has already diminished
- Turning can disrupt traffic flow and place other aircraft in danger
- Because of the narrow alert area you could turn to avoid one windshear, only to fly into a stronger one while you are maneuvering