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34.NAVIGATION
ADR 1 (2,3,4)
OFF – Air data output disconnected
FAULT Lt – Amber with ECAM if fault detected in the Air Data Ref.
NAV
OFF – ADIRU not energized
NAV – Normal
ATT – IR mode supplying attitude & heading.
- no nav capability
- hdg must be entered thru MCDU regularly ( approx 10
mins)
Complete realign – sel OFF for more than 5 secs. Takes approx. 10 min
- recommend before long range flight
Fast realign – cycle OFF then ON within 5 secs. Takes approx. 3 min
IR 1 (2,3)
OFF – inertial data output disconnected
FAULT LT – Amber with ECAM if fault detected.
- steady light = respective IR is lost
ON
ARM
OFF
Overhead Panel Switches
23-Jan-07 For reference only
- flashing light = attitude & heading may be recovered in ATT mode
Light Only
Amber when 1 or more IRS supplied by batteries.
If Amber on ground – external horn sounds
- ADIRU Lt on SERVICE INTERPHONE BAY panel
comes on.
GPWS
Mode 1: Excessive RoD –“SINK RATE” & “PULL UP”
Mode 2: Excessive Terrain Closure – “TERRAIN” & “PULL UP”
Mode 3: Altitude Loss After T/O – “DON’T SINK”
Mode 4: Unsafe Terrain Clearance – “TOO LOW-GEAR (FLAPS,TERRAIN)”
Mode 5: Descent Below Glide Slope – “GLIDE SLOPE”
EGPWS: “TERRAIN AHEAD” “PULL UP”
SYS
OFF – All GPWS alerts (1 to 5) inhibited
FAULT LT – Amber with ECAM when GPWS fault detected
Note: ILS 1 fails, only mode 5 inhibited. No Fault Lt or warning.
G/S MODE
OFF – Glide slope mode (mode 5) inhibited.
FLAP MODE
OFF – Flap mode (“TOO LOW-FLAPS) inhibited.
- Avoids warnings with landing at Reduced flap.
- CONF 3 sel in MCDU auto inhibits warning when Flap 3 is reached
TERR
OFF – Inhibits Terrain Awareness Display (TAD) & Terrain Clearance Floor (TCF)
modes
- Does not affect basic GPWS modes 1 to 5.
FAULT Lt – Amber with ECAM if TAD or TCF made fails.
Overhead Panel Switches
23-Jan-07 For reference only
OTHER SYSTEMS
NWS TOWING
FAULT – Red on gnd when NWS has exceeded 93˚ (Red light also on nose ldg
gear)
Pressed – Light goes out
Overhead Panel Switches
23-Jan-07 For reference only
35. OXYGEN
CREW SUPPLY
High pressure cylinders in LH lower fuselage.
Over pressure auto supplied above 30,000ft cab alt to help prevent condensation
etc
Mix of cabin air and oxy up to 35,000ft cab alt. 100% oxy above 35,000ft cab alt.
ON – Valve is open, supplying low pressure oxy.
- is normal position in flight
OFF – Valve closed. White light on.
A340 –Pneumatic latching system allows masks to fall when cab alt exceeds 14,000ft (+0, -500ft).
Altimetric flow regulation device controls passenger flow rate from oxy cylinders located behind
RH sidewall lining in FWD cargo compartment.
A330 – Electric latching system allows masks to fall when cab alt exceeds 14,000ft (+0, -500ft).
Oxy delivered at constant pressure by oxygen generator which last about 22 min. Oxy generation
may emit heat and smoke.
PASSENGER SYS ON
White light when system on. Remains on until RESET on maint panel is pressed.
MASKS MAN ON
PA automatically broadcasts instruction whether MAN or AUTO
deployment
AUTO - Normally in AUTO position. Masks auto drop at 14,000ft cab
alt.
Pressed – Masks drop
RESET (A340)
Maintenance crew use this pb to reset after the system has operated.
ON – White light comes on, PASS SYS ON light goes off, PA recording stops.
- System shut off valves close
- Main supply line shut off valves open
- ON light goes off when reset complete (3 sec)
FAULT Lt – Amber when reset failed.
RESET (A330)
Maintenance crew use this pb to reset after the system has operated.
ON – White light comes on, PASS SYS ON light goes off
FAULT Lt – Amber when door latch solenoids are energized for more than 30 secs
Overhead Panel Switches
23-Jan-07 For reference only
AUTO
CLOSE OPEN
36. PNEUMATIC
ENG 1 BLEED (2,3,4)
ON – Bleed valve opens provided:
- Upstream pressure is >8psi
- APU BLEED pb is at OFF or APU bleed valve closed
- No onside wing or pylon leak, overpressure or overtemp.
- ENG FIRE pb is not released
- Eng start valve closed
FAULT Lt – Amber with ECAM if:
- Bleed valve not closed during eng start
- Bleed valve not closed with APU bleed ON and for RH eng X-bleed open)
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