I have a question on AOA data. The FDR records their actual values, which we get in the report. But wasn't these values fed to the ADRs, which in turn were rejected? Where did the PRIMs get the data from and how did they elect the data as correct to trigger a stall warning? (Shouldn't AOA be correlated -at least to a certain degree of incidence- with airspeed, which was unreliable?)
- The stall warning is processed in FWCs not FCPCs
- It's the ADR itself which sets AOA to 0° (SSM=NCD) if CAS is below 60 Kts.
(A. did already changed that with 'BUSS' option, AOA is always available [only SSM will be NCD if CAS <60Kts])
- In ALT/DIR LAW the AOAsw triggervalue is 10,8°, this value is modified by a value which depends on MACH (and in other flight phases by S/F Config and Speedbrake setting)
The minium AOAsw triggervalue is 3,8° @ or above M 0.82.