Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

A320 ELEC EMER and pack failures

Tech Log The very best in practical technical discussion on the web

A320 ELEC EMER and pack failures

Old 2nd Nov 2021, 07:55
  #1 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,020
A320 ELEC EMER and pack failures

A320 ELEC EMER and pack failures
Hello guys! A new communication from Airbus says that in ELEC EMER config when gear is lowered the pack1+2 fail will happen as the power supply is cut off. There's nothing in systems remaining in QRH or FCOM. Anyone has anything to say about this? Thanks
vilas is offline  
Old 3rd Nov 2021, 14:46
  #2 (permalink)  
 
Join Date: Jun 2009
Location: Mars
Posts: 52
The answer should be in the Sys Remaining table. Pack 2 cannot be controlled closed in EMER CONFIG in any case. Pack 1 can be controlled on the EMER GEN, but once on batteries only cannot be controlled closed. If you have an old style RAT that stalls once the landing gear is out, you would then lose control of pack valve 1.
CrazyStuntPilot is offline  
Old 3rd Nov 2021, 17:24
  #3 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,020
As I said there's no difference in Systems remaining or in FCOM. This appears something new is introduced but why not in FCOM?
vilas is offline  
Old 3rd Nov 2021, 18:39
  #4 (permalink)  
 
Join Date: May 2010
Location: Austria
Age: 45
Posts: 40
On Bat only: is Bleed 1 controlled by BMC2 and Bleed 2 by BMC1? Or is the bleed valve closed and with no pressure pack 1+2 springloaded closed? Wild speculation from my side.
8314 is offline  
Old 3rd Nov 2021, 21:04
  #5 (permalink)  
 
Join Date: Oct 2009
Location: Australia the Awesome
Posts: 362
Gíday all,

I can guarantee I am not the sharpest tool in the shed, but Iím a bit concerned because:

If Vilas doesnít know, then I donít know 🤷‍♂️.

Letís hope you can get an answer from Airbus and can pass it on, Iíve appreciated your input on all things Airbus on this forum.

Cheers
Roj approved is online now  
Old 8th Nov 2021, 07:38
  #6 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,020

This is the reply from Airbus to a simulator company. It didn't happen before. So it appears this change is knew. Any one else has any information on this? Thank you
vilas is offline  
Old 8th Nov 2021, 07:51
  #7 (permalink)  
 
Join Date: Jun 2004
Location: Just Around The Corner
Posts: 1,367
Why is important to advise the crew of such a shed ? With loss of both AC we already lost a number of items and , if landing gear is down we are seconds from landing , if we missed the approach for sure we will not climb so high that any kind of pressurization is needed in this conditions.
Nick 1 is online now  
Old 8th Nov 2021, 20:25
  #8 (permalink)  
 
Join Date: Oct 2009
Location: Australia the Awesome
Posts: 362
Thank you for that Vilas👍

I wonder if it will be included in the ďSystems RemainingĒ section in the near future?
Roj approved is online now  
Old 9th Nov 2021, 09:34
  #9 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,020
Nick 1

The question is not whether it's required. It wasn't happening before and any changes to systems remaining must be informed to the crew instead of surprising them in real life LAND ASAP situation.
vilas is offline  
Old 9th Nov 2021, 10:01
  #10 (permalink)  
 
Join Date: Mar 2001
Location: I wouldn't know.
Posts: 4,327
Thanks for that information. Informative stuff.
Denti is online now  
Old 9th Nov 2021, 15:17
  #11 (permalink)  
 
Join Date: Jun 2009
Location: Mars
Posts: 52
In your simulator configuration with ACSCs (instead of PACK Controllers as in older simulator standards), there are two simulated ACSCs: one for each pack, and each with two independent lanes.
With simulator Std 2.0 and FWC H2-F9D, the alert AIR PACK 1+2 FAULT is triggered (in part) by the internal FWC logic signal ACSC FAULT. The internal signal ACSC FAULT is itself triggered by the signals [ACSC1 FAULT AND ACSC2 FAULT] coming from SDAC. There is no flight phase inhibit in the case of AIR PACK 1+2 FAULT due to ACSC FAULT.
As Airbus noted, when the landing gear is extended, the power supply to all ACSCs is cut, therefore the ACSC FAULT is triggered internally and the AIR PACK 1+2 FAULT is triggered as a result.
Is it possible that the new behavior you noticed is due to the particular simulator software standard which simulates the ACSCs instead of the old Pack Controllers? The FWC logic for Pack Controllers is different, as well as the power supply perhaps.
CrazyStuntPilot is offline  
Old 9th Nov 2021, 16:52
  #12 (permalink)  
Thread Starter
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,020
Thanks! That's what I wanted. It is CAE Std 2.0 sim.
vilas is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.