ECAM APU page
Back to ECAM System Display Overview
| Number | Name | Variation | Meaning |
|---|---|---|---|
| 1 | AVAIL | Green color | The APU N is above 99.5 % or when the APU N is above 95 % for 2 seconds |
| Hidden | The APU is not available | ||
| 2 | APU Bleed air valve | Green crossline | The APU bleed air valve is closed. |
| Amber crossline | The APU bleed air valve is closed, but the APU bleed is ON. | ||
| Green inline | The APU bleed air valve is open | ||
| Amber XX | The APU bleed air valve status is not available, or the APU Bleed pushbutton is not available. | ||
| 3 | APU bleed air pressure | Green color | The bleed air pressure is within normal operating range. |
| Amber XX | ADIRS 1 or ADIRS 2 is not available, or the data from the ECB is not available. | ||
| 4 | APU GEN line contactor | Green color | The APU GEN line is closed |
| Hidden | The APU GEN line is open | ||
| 5 | APU GEN indication | White color | APU GEN parameters are within normal operating range. |
| Amber color | At least one of the APU GEN parameters is in an amber color | ||
| 6 | APU GEN Load legend | Green color | The APU GEN load is within normal operating range. |
| Amber color | The APU GEN load is greater than 100%. | ||
| 7 | APU GEN voltage legend | Green color | The APU GEN voltage is within normal operating range. |
| Amber color | The APU GEN voltage is greater than 120 volts or lower than 110 volts. | ||
| 8 | APU GEN frequency legend | Green color | The APU GEN frequency is within normal operating range. |
| Amber color | The APU GEN frequency is greater than 410 Hertz or below 390 Hertz. | ||
| 9 | Fuel pressure | Amber FUEL LO PR | The APU fuel pressure is low |
| Hidden | The APU fuel pressure is within normal operating range. | ||
| 10 | APU Flap | Green FLAP OPEN | The APU air intake is fully open. |
| Green pulsing FLAP OPEN | The APU air intake is not fully closed after the APU master switch has been turned off for 3 minutes. | ||
| Hidden | The APU air intake is fully closed. | ||
| 11 | APU N | Green color | The APU N speed is within normal operating range. |
| Amber color | The APU N speed is greater than 102 %. | ||
| Red color | The APU N speed is greater than 107 %. | ||
| 12 | APU EGT | Green color | The APU EGT temperature is within normal operating range. |
| Amber color | The APU EGT is greater than the EGT Maximum minus 33 °C, while the APU is starting. | ||
| Pulsive Amber color | The APU EGT is greater than the EGT maximum minus 33 °C, while the APU is running. | ||
| Red color | The APU EGT is greater than the EGT max. |
Last update:
November 6, 2023