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Delayed Gear Retraction Video  
User currently offlineKDTWFlyer From United States of America, joined Jun 2004, 828 posts, RR: 1
Posted (9 years 11 months 1 week 6 days 4 hours ago) and read 5168 times:

Go to http://www.flightlevel350.com.

In the keywords box enter file ID 1096443254-73. Make sure that for the search-in drop-down menu that you have selected File ID. Execute the search and the results page should show a AA757 taking off from LAX. Watch the video and notice how the crew doesn't raise the gear. Special procedure or mistake/malfunction?


NW B744 B742 B753 B752 A333 A332 A320 A319 DC10 DC9 ARJ CRJ S340
12 replies: All unread, jump to last
 
User currently offlineAogdesk From United States of America, joined Jun 2004, 935 posts, RR: 3
Reply 1, posted (9 years 11 months 1 week 6 days 4 hours ago) and read 4872 times:

true....thats definitely longer than normal. My guess is that the flight was a gear down ferry with the gear pinned.....OR perhaps they had a take-off phase problem that required to be dealt with prior to lifting the gear....OR perhaps the crew just couldn't find that lever with the wheel on the end of it... Smile/happy/getting dizzy

User currently offlineBarney Captain From United States of America, joined Nov 2001, 965 posts, RR: 12
Reply 2, posted (9 years 11 months 1 week 6 days 1 hour ago) and read 4688 times:

It's probably 1 of 2 things;

1. A gear down ferry flight (as mentioned)

2. Or simply (and more likely), a brake cooling technique. Retracting hot brakes in to an enclosed wheel well sometimes has, well,......bad results.



...from the Banana Republic....
User currently offlineWakeTurbulence From United States of America, joined Apr 2004, 1294 posts, RR: 16
Reply 3, posted (9 years 11 months 1 week 6 days 1 hour ago) and read 4684 times:

Could be any of the above. I read another post on this site from a jump seater saying that the crew flying the plane was arguing about proper V-Speeds and didn't retract the gear until a couple minutes into the flight. In normal circumstances gear is retracted after positive rate of climb is established.
-Matt



Jetwash Images - Feel the Heat!!!
User currently offlineAJ From Australia, joined Nov 1999, 2391 posts, RR: 24
Reply 4, posted (9 years 11 months 1 week 5 days 23 hours ago) and read 4644 times:

Another possibility that Barney alluded to is a deferred defect procedure required to be flown when a brake is deactivated.

A brake unit can be deactivated with tooling or by capping the brake. If the brake is capped the undercarriage must be left extended for two minutes after departure to ensure the wheels have spun down prior to retraction.

Cheers.


User currently offlineCRJDispatchKid From United States of America, joined Feb 2004, 99 posts, RR: 3
Reply 5, posted (9 years 11 months 1 week 5 days 8 hours ago) and read 4310 times:

My experiences as a dispatcher (for the CRJ) is the following. The main landing gear bay door overheat is probably inop (deffered). Basically, it's probably because a sensor that tells the temperature of the gear bay is broken, so you fly with the gear down to make sure they are cool. In our MEL it states that the gear must remained down for 10 minutes after takeoff. Then the gear can be retracted and continue as normal.




Thanks...C-Ya...Bye
User currently offlineHirnie From Germany, joined May 2004, 594 posts, RR: 0
Reply 6, posted (9 years 11 months 1 week 5 days 8 hours ago) and read 4299 times:

All reasons above are correct.
I would bet on hot brakes for which the gaer remains extended to cool down. This is the reason seen most often at airports when pilots don`t retract undercarriage after having positive rate of climb.


User currently offlineAAR90 From United States of America, joined Jan 2000, 3474 posts, RR: 46
Reply 7, posted (9 years 11 months 1 week 5 days 7 hours ago) and read 4302 times:

I would bet on hot brakes for which the gaer remains extended to cool down.

Highly doubtful. This is a departure and the taxiout is at relatively slow speeds with little opportunity to heat up the brakes.

This is the reason seen most often at airports when pilots don`t retract undercarriage after having positive rate of climb.

Uh, nope. The most common reason is a deactivation of one of the brake pucks meaning a tire/wheel will not be stopped by the brake system prior to retracting into the wheel well. "Hot brakes" only come into play during a relatively quick turnaround... something a B757 can not do...especially at LAX.



*NO CARRIER* -- A Naval Aviator's worst nightmare!
User currently offlineMiamiair From , joined Dec 1969, posts, RR:
Reply 8, posted (9 years 11 months 1 week 4 days 19 hours ago) and read 4063 times:

When taxiing a long distance and stop and go in the line to depart; an accepted practice is to leave the gear extended a bit longer to cool the brakes. Key to this is not exceed the gear operating speed.

User currently offlineLongHauler From Canada, joined Mar 2004, 4987 posts, RR: 42
Reply 9, posted (9 years 11 months 1 week 4 days 17 hours ago) and read 4026 times:

It also depnds on how short the turn-around was, on a quick turn, the brakes can still be pretty hot from the previous landing. Leaving the gear down is an accepted practise to cool them.

There is even a chart one can refer to, that given the landing distance/temp/weight, outside temp, taxi time, etc, how long the gear should be left extended after take off.



Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
User currently offlineLineMechQX From United States of America, joined May 2004, 77 posts, RR: 0
Reply 10, posted (9 years 11 months 1 week 4 days 16 hours ago) and read 3972 times:

Maybe it was a mistake, I've seen an instance with a newer FO. The story as it was relayed to us was that she was supposed to have retracted the gear, but somehow between her and the captain they got left down, and exceeded gear operation speed. Then in a stroke of genius they brought the gear up in the hole. Opening the fragile gear doors, and requiring a Return to Field, and some lengthy overspeed inspections. Not fun on a busy night in the hangar. Probably not the case, here, but you never know.

Late
PC


User currently offlineEmansilla From , joined Dec 1969, posts, RR:
Reply 11, posted (9 years 11 months 1 week 2 days 8 hours ago) and read 3580 times:

Hi Guys,

I took the mentioned video, I am also the webmaster of Flightlevel350.com and I saw the same thing happen to an A340 from Lufthansa (have it on video) where it left the gear down as far as I could see with my zoom (about 2 minutes after take off). That day was a really hot day (100F+) so my guess is that they still had hot brakes from their previous landing (since on hot days more braking is required due to less dense air and less effective reversers/airspeed brakes?) or due to long taxiing time. It is common procedure to leave the gear down to cool off brakes.

I'm glad you are enjoying the site.

Regards,


Esteban Mansilla


User currently offlineKDTWFlyer From United States of America, joined Jun 2004, 828 posts, RR: 1
Reply 12, posted (9 years 11 months 6 days 1 hour ago) and read 3092 times:

Emansilla,

That website is the best! Keep it up Smile



NW B744 B742 B753 B752 A333 A332 A320 A319 DC10 DC9 ARJ CRJ S340
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