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(A) Actual N1
‐ It is normally green.
‐ It becomes red, if actual N1 exceeds the max permissible N1 (99 % ).
(B) Max permissible N1
The N1 redline is represented by a red arc at the end of the scale beginning at 99 %.
(C) N1 exceedance
If 99 % is exceeded, a red mark appears and remains at the max value achieved.
It will disappear after a new start on ground.
(D) N1 max
It is only displayed in reverse mode.
The N1 max corresponds to the N1 reached in full reverse (amber).
(7) HP rotor speed N3
The digital indication is normally in green. It is twice as bright during engine start, and is
located in a grey background box.
When N3 is above 100 % , the indication becomes red, and a red cross appears next to the
digital indication. The red cross will only disappear after a new start on ground.
When the N3 value is degraded (in case of loss of sensed N3), the last digit is amber
dashed.
(8) Fuel flow
It is indicated in green.
(9) A FLOOR message
Is displayed in amber, when the ECUs receive the corresponding signal from FMGS.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
A330 CONTROLS AND INDICATORS (RR, PW)
A330/A340 FLEET DSC-70-91 P 10/18
FCOM 19 AUG 10
(10) IDLE message
This legend appears in green when both engines are at idle. It flashes for 10 s, then remains
steady.
(11) CHECK EWD message
It is displayed in amber on the EWD, and on both NDs, in case of a discrepancy between the
EPR, N1, N2, N3, EGT, FF values on the FADEC-DMC bus and corresponding displayed
information.
Note: When one parameter becomes invalid, two amber crosses replace the associated
digital indication. For EPR, EGT and N1 parameters, the needle and the box
around the digital display disappear.
(1) Engine Pressure Ratio (EPR)
The EPR needle is removed and the digital indication is replaced by two amber crosses.
REV indication remains available.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
A330 CONTROLS AND INDICATORS (RR, PW)
A330/A340 FLEET DSC-70-91 P 11/18
FCOM 19 AUG 10
(2) LP Rotor speed (N1)
(A) Actual N1 (digits boxed grey)
‐ It is normally green.
‐ It becomes amber, if actual N1 is above N1 MAX (See C).
‐ It becomes red, if actual N1 exceeds the max permissible N1 (99 % ).
(B) N1 TLA (blue circle)
The N1 corresponding to the thrust lever position (predict N1). It is not displayed in
reverse mode.
(C) N1 MAX
It is only displayed in N1 rated mode or reverse mode.
The N1 MAX amber index is the N1 limit value corresponding to the full forward, or full
reverse position of the thrust levers.
(D) Max permissible N1
The N1 redline is represented by a red arc at the end of the scale begining at 99 % .
(E) N1 exceedance
If 99 % is exceeded, a red mark appears and remains at the max value achieved. It will
disappear after a new start on ground.
(3) N1 MODE and N1 rating limit
Displayed in a white box
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
A330 CONTROLS AND INDICATORS (RR, PW)
A330/A340 FLEET DSC-70-91 P 12/18
FCOM 19 AUG 10
(A) N1 MODE is displayed in white when both engines are in back up N1 mode.
(B) Thrust limit mode
TOGA, CLB, MCT limit mode selected by the thrust lever is displayed in blue.
Note: Flex takeoff is not allowed in N1 mode.
(C) N1 rating limit
It is only computed in N1 rated mode by the FADEC according to the thrust lever angle
and is displayed in green.
The highest N1 mode and associated N1 limit value of the both engines is displayed.
Note: On ground, if at least one engine is controlled in N1 unrated mode, the thrust
limit mode and the N1 rating limit are replaced by amber crosses.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
A330 CONTROLS AND INDICATORS (RR, PW)
A330/A340 FLEET DSC-70-91 P 13/18
FCOM 19 AUG 10
Applicable to: ,
SECONDARY PARAMETERS
START CONFIGURATION
(1) IP rotor speed N2
Digital indication, normally green, is doubly bright during engine start and located in a grey
background box.
When the N2 is above 103.3 % , the indication becomes red, and a red cross appears
next to the digital indication. The red cross will only disappear after a new start on ground.
When the N2 value is degraded (in case of a triple N2 sensors failure), the last digit is
amber dashed.
(2) Oil quantity indication
The needle and the digital indication are normally green.
The digital indication pulses, if the oil quantity drops below 4 quarts.
　
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