Mac the knife
Apologies for asking again.
Was not (at least) the standby Artificial Horizon working?
Would not the fact that it would have been showing mostly blue sky have given them a clue to the marked nose-up attitude?
And thereby an indication of incipient/actual stall?
Why wouldn't they have looked at it?
It seems interesting to look at the normal and stand-by instruments mounted on 'Airbus A380
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The ADIRS is composed of 3 Air Data and Inertial
Reference Units (ADIRUs).
>The Air Data (AD) section computes primary air data
parameters using data from different probes installed
on the aircraft fuselage:
>1 Multi-Function Probe (MFP) per ADIRU
provides total pressure (Pt), Total Air
Temperature (TAT) and Angle-of-Attack (AOA)
Measurements
>1 Side Slip Angle (SSA) probe per ADIRU
provides the sideslip angle
>2 Integrated Static Probes (ISPs) per ADIRU
provide the static pressure (Ps)
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The Integrated Standby Instrument System (ISIS)
provides backup flight and navigation displays in the case
of an ADIRS, FMS or CDS failure.
The ISIS is composed of:
2 independent ISIS units,
the Standby Flight Display (SFD) unit and
Standby Navigation Display (SND) unit
1 standby pitot probe (Pt)
2 standby static probes (Ps)
-Internal gyros (attitude).
In normal configuration:
-The SFD unit computes and displays air data and
inertial reference parameters (SFD)
-The SND unit computes and displays navigation and
flight plan information (SND).
Each unit can perform all the ISIS functions.
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Now on A380 there are 3 multifunction probes and 1 normal probe air speed for ISIS?
and how many probes and static ports are mounted on the sides of the fuselage?
.