(4)
 Reconfiguration display In case of loss of AIR DATA parameters on CAPT or F/O PFD and ND, the ADR 3 can be used as a back up source by placing the AIR DATA selector switch in CAPT/3 position for EFIS 1 and F/O/3 position for EFIS 2.

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 True Airspeed Indication Display
 Figure 006

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 TAT/SAT Indication Display
 Figure 007

R 1EFF : 001-049, 101-105, 151-199, 201-203, 1 34-13-00Page 40 1 1 Config-1 May 01/05 1 1 1CES 1 In case of loss of TAT/SAT parameters on the lower ECAM DU, the ADR 3 can be used as a back up source by placing the AIR DATA selector switch in F/O/3 position.

 C. Warnings In addition to the AIR DATA flags displayed on the PFDs and NDs and on the CDU, warning messages are displayed on the lower part of the upper ECAM DU. Two kinds of warning messages can be displayed:
 -failure warning messages in case of loss of AIR DATA parameters
 -configuration warning messages in case of dangerous configuration of
 the aircraft. When the CLR key is pushed on the ECAM control panel, a STATUS page is displayed on the lower ECAM DU and indicates the STATUS and INOP SYS (systems).
 (1)
 Failure warning messages
 (Ref. Fig. 008, 009, 010)

 (a)
 NAV ADR 1(2)(3) FAULT
 NAV ADR 1(2) + 2(3) FAULT
 When these messages are displayed:

 -
the MASTER CAUT lights on the glareshield come on

 -
the Single Chime (SC) sounds

 -
the FAULT legend of the ADR pushbutton switch on the CDU comes on.

 (b)
 NAV ALTI DISCREPANCY (Ref. Fig. 011) This message is displayed when a difference higher than plus or minus 250 ft is detected by the external comparison inside the FWCs between the baro-corrected altitude (or plus or minus 500 ft for the standard altitude) provided by two ADRs. When it is displayed:

 -
the MASTER CAUT lights on the glareshield come on

 -
the Single Chime (SC) sounds

 -
the CHECK ALT message appears on the PFD.

 (2)
 Configuration warning messages
 (Ref. Fig. 012, 013)

 (a) OVERSPEED VM0/MM0
 OVERSPEED VFE/VLE
 When these messages are displayed:

 -
the MASTER WARN lights on the glareshield flash

 -
the Continuous Repetitive Chime (CRC) sounds.

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 NAV ADR 1(2)(3) FAULT Message
 Figure 008

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 NAV ADR 1+3(2+3) FAULT Message
 Figure 009

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 NAV ADR 1 + 2 FAULT Message
 Figure 010

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 NAV ALTI DISCREPANCY Message
 Figure 011

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 OVERSPEED VMO/MMO Message
 Figure 012

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 OVERSPEED VFE/VLE Message
 Figure 013

R 1EFF : 001-049, 101-105, 151-199, 201-203, 1 34-13-00Page 47 1 1 Config-1 May 01/05 1 1 1CES 1 OVERSPEED VMO/MMO warning processed by the FWC is triggered when the CAS/Mach calculated by the ADR exceed the VMO/MMO threshold by more than 4 kts/0.006 Mach. OVERSPEED VFE/VLE processed by the FWC is a function of CAS and depends on slat/flap position for the VFE and landing gear position for the VLE. For overspeed VLE, the warning is triggered at 284 knots.

 (b) Stall warning (Ref. Fig. 014) When this warning is activated:
 -
the MASTER WARN lights on the glareshield flash

 -
the cricket and the voice STALL sound.
 This warning is processed by the FWC and is a function of angle
 of attack value and slat position following three conditions:

 -normal law: if corrected angle of attack exceeds 23. or if corrected angle of attack exceeds 15. and slat < 15. and aircraft in clean configuration
 -alternate law if corrected angle of attack exceeds 13. or if corrected angle of attack exceeds 8. and slat < 15..
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