Was ich noch gerne wissen möchte: Nachdem AT in den Retard Mode schaltete und nach einer gewissen Zeitspanne das Landing Gear immer noch nicht compressed war, dürfte das doch dem System aufgefallen sein oder nicht? Dementsprechend, wenn es das System bemerkt hatte, dürfte doch ein Alarm ausgelöst werden oder liege ich da falsch?
Der Retard ist doch normalerweise für die Landung gedacht, wenn das Flugzeug kurz vor der Landung ausschwebt.
Gruß ;)
Antwort aus dem Dekker Bericht:
As it only showed “RETARD” (and not “FLARE”), the FMA annunciation gave
the appearance as if the A/T went into RETARD descent mode. However,
the A/T went automatically into the unexpected RETARD flare mode—not
because the crew had selected V/S, but because a number of conditions had
now been fulfilled, and the A/T was acting according to its own logic: the
aircraft was going below 2000 feet RA (in fact, it was at -7 feet RA,
according to its only available (and corrupted) input to the A/T system), the
flaps were more than 12,5 degrees out and the F/D mode was no longer in
ALT HOLD.
While the A/T had, in effect, decided it was time to land, FCC B was still
commanding the F/D and Autopilot B to stay on glideslope. One part of the
automation was doing one thing (landing), while the other part was doing
something else (flying). The part that was landing (the A/T) had control over
the airspeed, the part that was flying (Autopilot B) did not; it only tracked the
descent path on the glideslope.