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‐ During an automatic start, the HP fuel valve opens if :
‐ The ENG MODE selector is at IGN/START.
‐ N2 is above the following threshold :
• 22 % on the ground
• 15 % in flight
‐ During a manual start, the HP FUEL valve opens if :
‐ The ENG MODE selector is at IGN/START.
‐ The MAN START pushbutton switch is ON.
OFF: Close signals go directly to the HP fuel valve and the LP fuel valve. These signals
cause both channels of the FADEC to be reset.
Note: Releasing the ENG FIRE pushbutton allows flight crew to shut down the
engine by closing the LP fuel valve. There is a time delay of about 60 s at
ground idle as the engine burns the fuel left between the LP valve and the
nozzles.
(3) FAULT lt 1 (2)
FAULT lt : This amber light comes on, and a caution appears on ECAM, if there is:
‐ an automatic start abort
‐ a disagreement between the HP fuel valve position and its commanded
position.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
CONTROLS AND INDICATORS (CFM)
A318/A319/A320/A321 FLEET DSC-70-90 P 4/24
FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to:
, ,
MSN
(1) ENG MAN START pb sw
ON : The start valve opens if the ENG MODE selector is set to CRANK or IGN/START and
N2 < 20 %.
Both pack valves close during the start sequence.
Note: The start valve closes automatically when N2 ≥ 50 %.
The blue ON light comes on.
Off : When the ENG MAN START pushbutton switch is set to OFF during a manual engine
start, the start valve closes if the MASTER switch is OFF.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
CONTROLS AND INDICATORS (CFM)
A318/A319/A320/A321 FLEET DSC-70-90 P 5/24
FCOM 19 AUG 10
MAINTENANCE PANEL
Applicable to:
, ,
MSN
(1) FADEC GND PWR pb sw
ON : FADEC has electrical power on the ground if the ENG FIRE pushbutton is not
released.
ECAM
Applicable to:
, ,
MSN
GENERAL
The ECAM’s upper E/WD permanently displays the engines’ primary parameters. The ECAM’s
lower SD displays the secondary parameters, either when they are automatically selected by the
system, or manually selected by the flight crew.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
CONTROLS AND INDICATORS (CFM)
A318/A319/A320/A321 FLEET DSC-70-90 P 6/24
FCOM 19 AUG 10
Applicable to:
(1) LP rotor speed (N1)
(A)
Actual N1 : The N1 needle and N1 digital indication are normally in green. They pulse in :
Amber, when the actual N1 ‐ is above the N1 MAX (See E) ;
‐ Red, when the actual N1 is above the N1 RED line (104 %).
When the N1 is degraded (in case both N1 sensors fail), the last digit of the digital
display is dashed in amber.
(B) N1 Command : This N1 corresponds to the demand of the autothrust system (A/THR), as
limited by the position of the thrust lever. It is displayed only if A/THR is on.
(C) Transient N1 : This blue arc symbolizes the difference between the N1 command and the
actual N1. It is only displayed when A/THR is active.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
CONTROLS AND INDICATORS (CFM)
A318/A319/A320/A321 FLEET DSC-70-90 P 7/24
FCOM 19 AUG 10
(D) N1 TLA (white circle) : N1 corresponding to the thrust lever position.
(E) Max N1 : The Max N1 amber index is the N1 limit value, corresponding to the full forward
position of the thrust levers.
(F) Max permissible N1 : The N1 redline is represented by a red arc at the end of the scale,
beginning at 104 %.
(G) N1 exceedance : If 104 % is exceeded, a red mark appears and remains at the maximum
value achieved. It will disappear after a new start on ground or after maintenance action
via the MCDU.
(H) REV indication : It is displayed in amber, when at least one reverser cowl is unstowed or
unlocked.
It becomes green, when the reverser cowls are fully deployed.
(If unlocked in flight, the indication first flashes for 9 s and then remains steady).
(2) Thrust limit mode
TOGA, FLX, CL, MCT, or MREV limit mode, selected by the position of whichever thrust lever
is farther forward, is displayed in blue.
(3) N1 rating limit
It is computed by the FADEC for the present thrust lever angle, and is displayed in green.
Note: When the aircraft is on ground with the engines running, the N1 rating limit displayed
here corresponds to the TOGA thrust limit, regardless of the thrust lever position.
When the aircraft is on ground with the engines running and FLEX mode is selected,
　
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