Originally Posted by
oicur12.again
As pointed out by several posters here with thanks, the A319 autothrust issue is indeed a case of “autothrust misbehavior” and has now been rectified on our fleet. It is not related to GS mini.
The PWS issue is not so simple.
“Predictive wind sheer tells if you continue on the present track 3 miles straight ahead you could kill yourself. Now it's your choice.”
True, but PWS is only looking at 40 degrees left and right of aircraft heading, less than half the sky. A turn away from a windshear icon on the nose could turn you into a worse windshear event presently unseen by the system.
I have managed to find a reference on the Honeywell web page that advises:
“Doppler processing limits the windshear detection region to approximately +/-40 degrees ahead of the aircraft. It is not uncommon to have multiple microbursts in the same area, so a turn to avoid one microburst might place the aircraft in a banked turn and in position to encounter another possibly more severe microburst.”
Apart from PWS you already have full radar picture in front you. PWS only displays the worst area ahead. The weather assessment should have been done before take off roll. And if you had entire ND full of echoes then either take off should have been postponed or done in different direction RW. But after PWS warning there is no question of continuing in same direction. Don't forget even takeoff needs to be abandoned with PWS warning. Radar manufacturer has only legally covered himself by stating that things could be worse outside that. What is outside PWS range is unknown but what is front is definitely dangerous. That single statement is not a license to go through what's in front. When you start the turn PWS will cover that area also. You may have to do 360°. If there was no PWS would you go through a CB in front?