This is my version and associated references:
1) During taxi for take-off on snowy taxiways, you get the following ECAM warning: "ANTI-ICE CAPT TAT FAULT"
Ans.
b) Disregard warning as this is normal
FCOM 2.04.10 Pg.12 (Fluid Contaminated Runways) states that this warning may be expected since RAs may not be able to compute any data. The wording of (d) is also too close to disregard.
2)For RVSM operation with ADR 3 inoperative:
c) Record altitude indication on PFDs and standby altimeter for future use.
FCOM 2.04.50 Pg. 1 (RVSM)
3)APU Fire Extingusher Discharge light:
a)Illuminates amber when fire extingusher bottle has lost pressure
FCOM 1.26.20 Pg. 5
4) If before take-off the crew selects a FLEX TEMP that is less than the current TAT and the thrust lever is set to FLEX/MCT gate for take-off;
b) The engines produce MCT thrust
FCOM 1.70.30 Pg. 3