A320 down in Pakistan

Author
Discussion

Bandit110

298 posts

106 months

Tuesday 26th May 2020
quotequote all
focusxr5 said:
Like a series of bulbs for each landing gear which could turn green in the cockpit when each gear is locked in place,? Maybe each pilot could check each bulb has turned from red to green as part of, I don't know, a checklist, just to be sure.
Not really as this could be, has been, and probably was in this instance, missed in a high stress situation

Starfighter

4,950 posts

180 months

Tuesday 26th May 2020
quotequote all
Audio warning for over speed on the gear?

DuraAce

4,241 posts

162 months

Tuesday 26th May 2020
quotequote all
Bandit110 said:
focusxr5 said:
Like a series of bulbs for each landing gear which could turn green in the cockpit when each gear is locked in place,? Maybe each pilot could check each bulb has turned from red to green as part of, I don't know, a checklist, just to be sure.
Not really as this could be, has been, and probably was in this instance, missed in a high stress situation
Down to the crew to not get into such a situation in the first place. Shocking CRM. The approach should've been binned long before they got to that point in the chain of events.
Nobody else to blame but themselves (going on current/available info)

Bandit110

298 posts

106 months

Tuesday 26th May 2020
quotequote all
DuraAce said:
Down to the crew to not get into such a situation in the first place. Shocking CRM. The approach should've been binned long before they got to that point in the chain of events.
Nobody else to blame but themselves (going on current/available info)
Yep, I'm with you, based on the info so far

aeropilot

34,930 posts

229 months

Tuesday 26th May 2020
quotequote all
Bandit110 said:
DuraAce said:
Down to the crew to not get into such a situation in the first place. Shocking CRM. The approach should've been binned long before they got to that point in the chain of events.
Nobody else to blame but themselves (going on current/available info)
Yep, I'm with you, based on the info so far
Data is looking like they 'touched down' onto the runway at something like 200-210 knts......eek


Starfighter

4,950 posts

180 months

Tuesday 26th May 2020
quotequote all
drdino said:
Starfighter said:
11 dead on the ground.
Is this confirmed?
It would appear to be an early estimate. Latest reports are no dead and 4 injuries on the ground.

CrutyRammers

13,735 posts

200 months

Tuesday 26th May 2020
quotequote all
red_slr said:
They would need to cycle it.
Really? That sounds like a bonkers bit of design yikes
My toaster has a better safety interlock.

Starfighter

4,950 posts

180 months

Tuesday 26th May 2020
quotequote all
Your toaster doesn’t take 10 seconds to hold down the lever for it to lock in place. That makes it unnecessary to have audio alarms and voice alarms saying “Toast cold. lever” or 3 red warning light showing the lever was up.

essayer

9,119 posts

196 months

Tuesday 26th May 2020
quotequote all
PNF: "500ft"
PF: "Watch this"




Trevatanus

Original Poster:

11,140 posts

152 months

Tuesday 26th May 2020
quotequote all
Starfighter said:
Your toaster doesn’t take 10 seconds to hold down the lever for it to lock in place. That makes it unnecessary to have audio alarms and voice alarms saying “Toast cold. lever” or 3 red warning light showing the lever was up.
You don't know that. It could be one of those expensive Dualit ones.

Starfighter

4,950 posts

180 months

Tuesday 26th May 2020
quotequote all
Trevatanus said:
Starfighter said:
Your toaster doesn’t take 10 seconds to hold down the lever for it to lock in place. That makes it unnecessary to have audio alarms and voice alarms saying “Toast cold. lever” or 3 red warning light showing the lever was up.
You don't know that. It could be one of those expensive Dualit ones.
getmecoat

Starfighter

4,950 posts

180 months

Tuesday 26th May 2020
quotequote all
essayer said:
PNF: "500ft"
PF: "Watch this"

Am I reading this correctly?

The crew descended from 10000ft to touch down starting the crash in under 4 minutes and hit the runway at 220kts.

It would be interesting to see the graph from the flight the day before.

aeropilot

34,930 posts

229 months

Tuesday 26th May 2020
quotequote all
Starfighter said:
essayer said:
PNF: "500ft"
PF: "Watch this"

Am I reading this correctly?

The crew descended from 10000ft to touch down starting the crash in under 4 minutes and hit the runway at 220kts.
Yep, pretty much.


Bandit110

298 posts

106 months

Tuesday 26th May 2020
quotequote all
Thanks for that essayer.... uhhh that doesn't seem to say the same thing as what I'd read, about the approach being too fast *edited to add- for the landing gear.... it'll all unravel I suppose....

Edited by Bandit110 on Tuesday 26th May 11:53

red_slr

17,412 posts

191 months

Tuesday 26th May 2020
quotequote all
Starfighter said:
essayer said:
PNF: "500ft"
PF: "Watch this"

Am I reading this correctly?

The crew descended from 10000ft to touch down starting the crash in under 4 minutes and hit the runway at 220kts.

It would be interesting to see the graph from the flight the day before.
Looks like it. 220kts onto a runway is pretty much suicide unless you have one chance or something after an engine failure or some other life and death situation I see no reason to ever even attempt it during normal operations.

To do it with the gear up.... I am amazed that aircraft managed to even get back off the deck as they must have slammed it down.

CrutyRammers

13,735 posts

200 months

Tuesday 26th May 2020
quotequote all
Starfighter said:
Your toaster doesn’t take 10 seconds to hold down the lever for it to lock in place. That makes it unnecessary to have audio alarms and voice alarms saying “Toast cold. lever” or 3 red warning light showing the lever was up.
A trivial example, I'll admit smile I'm just amazed that there's a safety system (overspeed) which prevents the gear dropping, while allowing the lever to be moved - and which then requires manually cycling of the lever in order to try again. Human factors engineering is of interest to me, (largely but not entirely from a software UX perspective which is different, but related), and I always look to the design of aviation controls as an area where they take great care to prevent ambiguity or confusion. I guess my faith is being tested a bit of late.

red_slr

17,412 posts

191 months

Tuesday 26th May 2020
quotequote all
Its not quite that simple though.

They will get a master warning. Plus ECAM will pop up at least 2 messages with 30 second interval. They wont go away on their own.

Plus ding, ding, ding, ding, ding insentiently (you can hear it on the ATC recording) which wont stop until they cycle the lever.

Then IIRC at 750' they get "gear, too low" from GPWS.

I think GPWS might also give a second gear too low warning at 250'.

Its a lot, a lot of stuff for a pilot to ignore. Let alone two.

Honestly, I suspect they will find from past flights some cowboy flying from these guys. Because you don't get into this position by total chance, its a regular f*ck about with their SOPs IMHO that would cause this type of issue.

IANAP...


aeropilot

34,930 posts

229 months

Tuesday 26th May 2020
quotequote all
red_slr said:
Honestly, I suspect they will find from past flights some cowboy flying from these guys.
PIA though.......hasn't been an airline with a great reputation for decades........and I'm not sure how much we'll ever get to a proper report either given the way things work over there......there's still been no sign of a report published from a PIA crash that happened 4 years ago......3 or the 4 people appointed to investigate this are from the Pakistan Air Force as well, which probably means this one might go the same way.
Although there is hope in that they have given the FDR to the Airbus staff onboard the company A330 that flew to Karachi yesterday and returned to France afterwards.


Edited by aeropilot on Tuesday 26th May 13:07

Bandit110

298 posts

106 months

Tuesday 26th May 2020
quotequote all
red_slr said:
Its not quite that simple though.

They will get a master warning. Plus ECAM will pop up at least 2 messages with 30 second interval. They wont go away on their own.

Plus ding, ding, ding, ding, ding insentiently (you can hear it on the ATC recording) which wont stop until they cycle the lever.

Then IIRC at 750' they get "gear, too low" from GPWS.

I think GPWS might also give a second gear too low warning at 250'.

Its a lot, a lot of stuff for a pilot to ignore. Let alone two.

Honestly, I suspect they will find from past flights some cowboy flying from these guys. Because you don't get into this position by total chance, its a regular f*ck about with their SOPs IMHO that would cause this type of issue.

IANAP...
That's the point though, all these are in place yet they still appear to have unknowingly landed without wheels, damaging the engines and causing this crash, if the lever physically wouldn't lock into position, they wouldn't have thought they had it down when they didn't (even if they were ignoring other checklist and procedures*)

  • possibly

Munter

31,319 posts

243 months

Tuesday 26th May 2020
quotequote all
CrutyRammers said:
Starfighter said:
Your toaster doesn’t take 10 seconds to hold down the lever for it to lock in place. That makes it unnecessary to have audio alarms and voice alarms saying “Toast cold. lever” or 3 red warning light showing the lever was up.
A trivial example, I'll admit smile I'm just amazed that there's a safety system (overspeed) which prevents the gear dropping, while allowing the lever to be moved - and which then requires manually cycling of the lever in order to try again. Human factors engineering is of interest to me, (largely but not entirely from a software UX perspective which is different, but related), and I always look to the design of aviation controls as an area where they take great care to prevent ambiguity or confusion. I guess my faith is being tested a bit of late.
I think this might be avoiding something unexpected happeneing.

You only want the gear to lower, when you move the leaver. Not when the airspeed drops and you've forgotten the leaver in the "wrong" position.

So either it happens when you operate the control. Or it doesn't happen. In order to avoid an unexpected event in a different scenario.