CTC-231-046-00 ENGINE INDICATING SYSTEM
WARNING
INDICATIONS
FAULT DETECTION
& ANNUNCIATION
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION Page 3
Nov 02
CFM56-5B TRAINING MANUAL
WARNING INDICATIONS Upper display - N1 indications.
The N1 needle and N1 digital indication are normally green. The needle pulses amber when the actual N1 is above the N1 Max.
Both needle and digital indication pulse red when the actual N1 is above the N1 red line (104%). After an exceedance, a red mark appears at the maximum value achieved. It disappears after a new engine start on ground, of after maintenance action through the MCDU.
If N1 is degraded (N1 dual sensor failure), the last digit of the digital display is amber and dashed.
A blue arc symbolizes the difference between the N1 command and the actual N1. This is not displayed if the A/THR is off.
WARNING
INDICATIONS
FAULT DETECTION
& ANNUNCIATION
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION Page 4
Nov 02
CFM56-5B TRAINING MANUAL
CTC-231-047-00 N1 INDICATIONS
WARNING
INDICATIONS
FAULT DETECTION
& ANNUNCIATION
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION Page 5
Nov 02
CFM56-5B TRAINING MANUAL
WARNING INDICATIONS
Upper display - EGT indications.
The actual EGT indications are normally green
The index pulses amber above 915°C (or above 725°C during the start sequence). The index and the numerical value pulse red above 950°C.
If 950°C is exceeded, a red mark appears at the maximum value achieved. It disappears after a new take off, or after maintenance action through the MCDU.
WARNING
INDICATIONS
FAULT DETECTION
& ANNUNCIATION
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION Page 6
Nov 02
CFM56-5B TRAINING MANUAL
WARNING INDICATIONS
Upper display - N2 indications.
The HP rotor speed digital indication is normally green.
During the start sequence, the indication is green on a grey background.
When N2 is above 105%, the indication becomes red and a red + appears next to the digital indication. It
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