2 packs failure on a320

[Captain_BH]

hi there,

what happens if both air conditioning packs fails during flight in A320??

Thanks

[billybuds]

The cabin is unable to remain pressurised so get yourself down to FL100 and open the ram air inlet.

[Captain_BH]

Thank you sir

[STBYRUD]

Yup, according to procedure (FCOM 3 section 3.02.2) the Ram air inlet should be opened below FL 100 and after the differential pressure has reduced to less than 1 psi. Not much more you can do...

[390cruise]

Not much more you can do.....

Well,

for a start you could try to find out why two packs have failed.........and then you could try a reset........

appropriate use of ECAM?................

[hetfield]

Switch them to ON.....

[Bruce Waddington]

Hello Mahdi,

In a past life in an A320 the number one engine bleed tripped off just after take-off. No problem here as we are legal to dispatch with just one. ECAM followed but it did not reset.

During the climb the First Officer had the MEL out to see if there were any limitations we may want to consider when on comes the Master Warning and the ECAM says Engine Two Bleed Fault.

So, now we have the same situation a Dual Pack Fault. No air coming in and air still going out.

The first thing that happens is the outflow valves close to help limit the air loss. The second thing that happens is that the pilots look in stunned silence at the ECAM for a second or two, realize what the situation is, put on their O2 masks, declare an emergency and start downhill.

This happened at 21000 in the climb. We completed the applicable parts of the Emergency Descent Drill and then when all was under control headed for the QRH to see what we might do about getting a bleed or two back.

The cabin altitude climbed about 700 fpm and it never got higher than about 7000 feet.

By the time we got to resetting the bleeds they had both reset on their own As it was, one had tripped off for over pressure and one had tripped off for over temperature. Both had come back within limits during the descent.

best regards,

Bruce Waddington

[390cruise]

All is not lost!

Appropriate use of ECAM,evaluate the situation.

Consider the use of APU, at 21000ft this alone can pressurise the cabin(be aware of FCOM limitations)

Reset of bleeds.....a bonus!!

390

[TyroPicard]

390
If both packs have failed, how does the APU pressurise the aircraft? RTFQ

[390cruise]

RTFQ.....What me?

TyroPicard old chap,

Yes

I should have made my answer rather clearer, it is a reponse to good old BruceWaddington just above my post (double bleed failure) rather than Mahdi
(double pack failure).

Sorry to cause stress!!!

390

[hedgehog-in-fog]

Hello
Try to reset em first.
And if you fly old aicraft, packs tend to overheat in shower, water fall on temp probes. New ones are much better.
All the best.