Originally Posted by
Centaurus
Referring to Post No. 9 in which the writer states: It is a FD guided maneuver (activated by TOGA), I don't understand why you would try to control airspeed with pitch control when the FD should be guiding you.
My comment: Be wary of blindly following the FD indications during the windshear avoidance or GPWS escape maneuver. . Use for guidance by all means but be aware of the actual body angle while at the same time cross referencing the other flight instruments e.g altimeter. ASI, VSI and even a quick glance at the standby ADI which gives you raw data. Study of past accidents involving loss of control revealed the PF was blindly following the FD to the detriment of scanning the other flight instruments.
I think you are using bad examples here... Did those accidents involve windshear?
FD is a primary guidance. The QRH is clear that an initial pitch up to 15° is required. When the speedbrakes are confirmed retracted, the FD becomes primary _guidance_. If you don't focus on correct pitch, "the nose is everywhere and nowhere" because people chase other instruments. You better make people follow the FD as is expected by Boeing "within a certain pitch range", and not chase other instruments. That is also explained in these words in the procedure: "Intermittent stick shacker or initial buffet is the upper pitch attitude limit" (or pitch limit indication). The PF does not need to do anything else.
The _PM_ has to monitor vertical speed and altitude, callout trends towards terrain or _significant_ airspeed changes. But the ACT of flying is done through pitch. The standby ADI should NOT be glanced at, for no single reason other than IRS failures. The ASI should not be taken "literally" but used for tendencies as the speed in a violent windshear can be all over the place. The word by Boeing for PM to make a callout is correctly "significant".
Secondly, GPWS warning recovery is NOT a FD guided maneuver.