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Why Did Spoilers REmain Deployed During Taxi  
User currently offlineTranStar From United States of America, joined Jul 1999, 530 posts, RR: 0
Posted (4 years 3 months 2 weeks 4 days 8 hours ago) and read 4325 times:
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When my United 777 landed at Washington IAD, the spoilers remained deployed throughout the taxi and parking. Later, I noticed the plane at the gate and the spoilers remained deployed?

Any explanations?

TranStar

10 replies: All unread, jump to last
 
User currently offlineLarshjort From Denmark, joined Dec 2007, 1454 posts, RR: 0
Reply 1, posted (4 years 3 months 2 weeks 4 days 7 hours ago) and read 4312 times:

Maybe maintenance needed to check the spoilers and asked the flightcrew to keep them extended.

/Lars



139, 306, 319, 320, 321, 332, 34A, AN2, AT4, AT5, AT7, 733, 735, 73G, 738, 739, 146, AR1, BH2, CN1, CR2, DH1, DH3, DH4,
User currently offlineB777LRF From Luxembourg, joined Nov 2008, 1334 posts, RR: 3
Reply 2, posted (4 years 3 months 2 weeks 2 days 18 hours ago) and read 3896 times:

Some sort of mechanical problem. Had it happen a couple of times on the 757 - the spoiler lever had been placed in the down position during taxing to stand after landing, but they physically remained up. Wrote it up in the tech log and left it to engineering to deal with.

Most times the spoilers will auto-stow with the application of a bit of throttle, that is if they've auto-deployed having been set in the armed position prior to landing.



From receips and radials over straight pipes to big fans - been there, done that, got the hearing defects to prove
User currently offlinebarney captain From United States of America, joined Nov 2001, 940 posts, RR: 13
Reply 3, posted (4 years 3 months 2 weeks 20 hours ago) and read 3618 times:

Quoting TranStar (Thread starter):
When my United 777 landed at Washington IAD, the spoilers remained deployed throughout the taxi and parking. Later, I noticed the plane at the gate and the spoilers remained deployed?

Any explanations?

TranStar

5 bucks says they simply forgot to stow them after landing.



...from the Banana Republic....
User currently offlinePGNCS From United States of America, joined Apr 2007, 2821 posts, RR: 45
Reply 4, posted (4 years 3 months 2 weeks 2 hours ago) and read 3464 times:

Quoting barney captain (Reply 3):
Quoting TranStar (Thread starter):
When my United 777 landed at Washington IAD, the spoilers remained deployed throughout the taxi and parking. Later, I noticed the plane at the gate and the spoilers remained deployed?

Any explanations?

TranStar

5 bucks says they simply forgot to stow them after landing.

Ten bucks says barney captain is right.


User currently offlineRockinDokken From United States of America, joined May 2010, 4 posts, RR: 0
Reply 5, posted (4 years 3 months 1 week 6 days 15 hours ago) and read 3348 times:

Well, I know that spoilers will stay deployed up to 30 seconds after landing when set to auto mode on some aircraft. It does this incase the a/c bounces, so that the spoilers don't retract if it goes WOW.
Their main purpose is to dump the lift created by the wing, and having them retract if the plane bounced would make the landing run longer.


User currently offlineJetmatt777 From United States of America, joined Jun 2005, 2779 posts, RR: 33
Reply 6, posted (4 years 3 months 1 week 6 days 12 hours ago) and read 3246 times:

Quoting RockinDokken (Reply 5):
Well, I know that spoilers will stay deployed up to 30 seconds after landing when set to auto mode on some aircraft.

On some aircraft it is after a certain speed, say 45 knots. (Can't remember if that is IAS or GS)



No info
User currently onlineKPDX From United States of America, joined Dec 2005, 2741 posts, RR: 2
Reply 7, posted (4 years 3 months 1 week 6 days 7 hours ago) and read 3172 times:

Not to jack your thread, but I once saw a United 757-200 at PDX park at the gate with full flaps after landing. Is that normal?


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User currently offlineDonnieCS From United States of America, joined Jan 2007, 75 posts, RR: 0
Reply 8, posted (4 years 3 months 1 week 6 days 1 hour ago) and read 3095 times:

Pilots probably just didn't get around to unarming the ground spoilers during taxi in. You probably saw the spoilers come up and down a few times as power was applied and reduced during taxi. In simple terms, most aircraft have a ground spoiler arm switch. When the ground spoilers are armed, there is weight on the wheels, and throttles are idle, the ground spoilers will deploy. It's is somewhat common for a crew to forget to unarm the ground spoilers during the after landing check, thus causing the boards to go up and down during taxi.

Quoting KPDX (Reply 7):
Not to jack your thread, but I once saw a United 757-200 at PDX park at the gate with full flaps after landing. Is that normal?

While not a 757, our Gulfstreams get parked with flaps at 20 degrees (lowered on taxi in with engines running) to save wear and tear on the aux pump and batteries when maintenance has to lower them for postflight, preflight, and any other maintenance.



Charlie - Gulfstream flight mechanic
User currently offlinemcdu From United States of America, joined Apr 2005, 1460 posts, RR: 17
Reply 9, posted (4 years 3 months 1 week 4 days 15 hours ago) and read 2903 times:

Quoting DonnieCS (Reply 8):
You probably saw the spoilers come up and down a few times as power was applied and reduced during taxi.

You won't see the spoiler move up and down in the B777 due to thrust changes.


User currently offlineboeing767mech From United States of America, joined Dec 2000, 1026 posts, RR: 3
Reply 10, posted (4 years 3 months 1 week 4 days 11 hours ago) and read 2834 times:

Quoting barney captain (Reply 3):
Ten bucks says barney captain is right

Twenty bucks says when the power levers are advanced the spoilers will retract. Even during taxi in you advance the power levers another for the spoilers to retract. So my money is on the fact that they had a mechanical issue. The nice thing about the 777 is you can do checks of the systems right there in the cockpit using the MAT.

David



Never under-estimate the predictably of stupidty
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