Doors warning ECAM inhibition

[falcon71]

I always found it weird, that the APU page is not displayed automatically. This is caused by the ECAM door warnings, giving the DOORS page a higher priority. Now, I'm not sure if I'm correct, because this issue should have been noticed by the advising A300 pilots, but the way how I interpret the FCOM, the door warnings should be inhibited until the second engine is started:

[Eddie]

Hello,

What you're getting at does indeed make sense. I've let the team know.

Thank you! 🙂 

 

[CF104]

Door warnings are a Level 2 warning and will show the door ECAM page prior to the second engine start. The ECAM priority is a bit of a confusing beast considering the amount of system integration going on. I've attached a simplified diagram that shows the 12 flight phases and the ECAM pages that have priority. Within these flight phases there are multitudes of system inhibits and are too numerous to list here.

The logic for the ECAM doors page is covered in flight phase 1 and 12. Any door warning within these phases will bring up the DOOR ECAM page with the following exceptions. The APU start and ENGINE start overlap phase 1 and 2. Engine has the top priority during start and the ECAM will not switch over to the DOOR page at this time. The APU has lower priority over the ENGINE page but will inhibit the DOORS page during APU start until the APU RPM is >95% for 15 seconds or the APU Master Switch is selected OFF. Once the second engine is started the DOOR ECAM page is inhibited. If a Level 2 DOOR warning is indicated via the Master Caution and Aural Warning in any other flight phase, the crew will have to manually select the DOOR ECAM page. In Flight Phase 12 the DOOR ECAM page is back to the priority. 

Cheers,

John