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Airbus Experts - What Happened Here?  
User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Posted (1 year 3 months 1 week 3 days 1 hour ago) and read 5955 times:

Gentlemen,

I was at NGO today and saw something quite interesting on this CZ A319. At first I thought the crew were just having checklist issues because they were a bit lost while they taxied in from runway 18, and had wingtip strobes still on until just before they found the gate. Then I noticed the spoilers were still extended and stayed that way as they parked and shut everything down.

http://sphotos-b.ak.fbcdn.net/hphotos-ak-ash3/558753_3092240242108_814309663_n.jpg

Once the hydraulics went, the spoilers fell into their retracted position. Except for this one (it stayed in this position until the aircraft pushed and started engines for its return to Shenzhen):

http://sphotos-d.ak.fbcdn.net/hphotos-ak-prn1/524223_3092240202107_693066364_n.jpg

Is there a particular reason why this would happen?

Just a mild curiosity, thanks!


If you need someone to blame / throw a rock in the air / you'll hit someone guilty
14 replies: All unread, jump to last
 
User currently offlinebueb0g From United Kingdom, joined Jul 2010, 640 posts, RR: 0
Reply 1, posted (1 year 3 months 1 week 2 days 18 hours ago) and read 5706 times:

Interesting... Could be that the crew just forgot, maybe if they had an extended taxi down a runway following landing so left the strobes on? Spoilers is interesting, I don't know of a fault that would cause that. Unless there was a request from someone that the pilots leave the spoilers up I would say that the crew probably just missed part of the after landing flow.


Roger roger, what's our vector, victor?
User currently offlinezeke From Hong Kong, joined Dec 2006, 8861 posts, RR: 75
Reply 2, posted (1 year 3 months 1 week 2 days 14 hours ago) and read 5528 times:

Sounds like improper after landing flow. Lights are the PMs job, probably realised they were on when they went to turn off the taxi light. Spoilers are the PFs job after clearing the runway.


We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
User currently offlineB6JFKH81 From United States of America, joined Mar 2006, 2872 posts, RR: 7
Reply 3, posted (1 year 3 months 1 week 2 days 13 hours ago) and read 5474 times:

Quoting bueb0g (Reply 1):
Spoilers is interesting, I don't know of a fault that would cause that.

S.E.C. faul/fail maybe? Not sure if that would leave them deployed or not though.



"If you do not learn from history, you are doomed to repeat it"
User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Reply 4, posted (1 year 3 months 1 week 2 days 12 hours ago) and read 5459 times:

Yeah I was just wondering what could account for just one panel remaining half extended for 1 hour until the aircraft was powered up for the next flight.


If you need someone to blame / throw a rock in the air / you'll hit someone guilty
User currently offlineB6JFKH81 From United States of America, joined Mar 2006, 2872 posts, RR: 7
Reply 5, posted (1 year 3 months 1 week 2 days 12 hours ago) and read 5447 times:

I'll talk to some techs tomorrow when I get to the hangar to see what could have caused that (my airline has a large fleet of A320's), see if they have any input for your Aaron747. Something is telling me there was an SEC or actuator issue.


"If you do not learn from history, you are doomed to repeat it"
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5722 posts, RR: 11
Reply 6, posted (1 year 3 months 1 week 2 days 10 hours ago) and read 5390 times:

Quoting Aaron747 (Reply 4):

Yeah I was just wondering what could account for just one panel remaining half extended for 1 hour until the aircraft was powered up for the next flight.

Not enough residual pressure to pull them down when the handle finally gets stowed.
I see this on other airplanes in the hangar fairly frequently- if you don't bother to turn the pumps on, then the easy ones will come down, while the actuator that presents the most resistance will stay up until real pressure is applied.

That's my best guess, anyway.


User currently offlinebueb0g From United Kingdom, joined Jul 2010, 640 posts, RR: 0
Reply 7, posted (1 year 3 months 1 week 2 days 6 hours ago) and read 5295 times:

Quoting zeke (Reply 2):
Spoilers are the PFs job after clearing the runway

With many airlines, de-arming the spoiler is the PF's job during the exit from the runway with is a prompt to the PM to begin the after landing flow. In this case I'd say it's likely that this was the case and the Capt just forgot to do his after landing stuff, as that would explain both strobes and spoiler.



Roger roger, what's our vector, victor?
User currently offlinermm From Australia, joined Feb 2001, 524 posts, RR: 1
Reply 8, posted (1 year 3 months 1 week 1 day 17 hours ago) and read 4947 times:

Sometimes strobes are left on if the red beacon is on MEL

User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Reply 9, posted (1 year 3 months 1 week 1 day 14 hours ago) and read 4858 times:

Quoting rmm (Reply 8):
Sometimes strobes are left on if the red beacon is on MEL

The red beacon was operational.

Quoting AA737-823 (Reply 6):
Not enough residual pressure to pull them down when the handle finally gets stowed.
I see this on other airplanes in the hangar fairly frequently- if you don't bother to turn the pumps on, then the easy ones will come down, while the actuator that presents the most resistance will stay up until real pressure is applied.

That makes sense to me. I suppose the panels themselves must be pretty lightweight and would not come down on their own if the actuator arm is still extended.



If you need someone to blame / throw a rock in the air / you'll hit someone guilty
User currently offlinearmitageshanks From UK - England, joined Dec 2003, 3607 posts, RR: 15
Reply 10, posted (1 year 3 months 1 week 1 day 11 hours ago) and read 4791 times:

I had the same thing happen on a Tokyo-Beijing flight on a NW A330 back in 2007. Flaps went up after landing but spoilers stayed up all the way to the gate. Not sure what happened after shutdown as I was in the isle. Never figured out why.

User currently offlineNDWDCPGUY From Canada, joined Jan 2013, 9 posts, RR: 0
Reply 11, posted (1 year 3 months 6 days 14 hours ago) and read 4345 times:

Not that uncommon for a landing aircraft to taxi to the stand using idle power only. Advancing the power levers returns auto spoilers to the stow position. The power levers may not have been advanced after landing. Flt crew often forget to turn off wing tip strobe lights after landing.

User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Reply 12, posted (1 year 3 months 6 days 13 hours ago) and read 4312 times:

Quoting NDWDCPGUY (Reply 11):
The power levers may not have been advanced after landing.

Power was definitely added after landing. They got lost on the way to the gate and made like a bat out of hell once they knew where they were going.



If you need someone to blame / throw a rock in the air / you'll hit someone guilty
User currently offlinebueb0g From United Kingdom, joined Jul 2010, 640 posts, RR: 0
Reply 13, posted (1 year 3 months 6 days 6 hours ago) and read 4194 times:

Quoting NDWDCPGUY (Reply 11):
Not that uncommon for a landing aircraft to taxi to the stand using idle power only. Advancing the power levers returns auto spoilers to the stow position

Not on an airbus (at least not until something like 75% thrust is added)



Roger roger, what's our vector, victor?
User currently offlineautothrust From Switzerland, joined Jun 2006, 1589 posts, RR: 9
Reply 14, posted (1 year 2 months 4 weeks 1 day 5 hours ago) and read 3534 times:

Quoting AA737-823 (Reply 6):
if you don't bother to turn the pumps on, then the easy ones will come down

Wouldn't it suffice to enable the PTU to get more pressure so the PF can retract the spoilers?



“Faliure is not an option.”
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