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UA1516 'Emergency' in Costa Rica

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Old Apr 25, 2017, 1:52 pm
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UA1516 'Emergency' in Costa Rica

On Monday April 24th, UA1516, a B738 aircraft on a flight from Liberia airport, Costa Rica, to Houston had to circle for an hour and dump fuel before returning to the airport to land with one engine out of operation. Apparently there was a sudden wind gust on landing which added complication. No injuries were reported
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Old Apr 25, 2017, 2:01 pm
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There is an interesting thread going on over at a.net where one user is somehow turning this into a "need 4 engines over water" debate.
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Old Apr 25, 2017, 2:07 pm
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All Boeing 737 models do not have fuel dump capability. They can land at their maximum takeoff weight.

I don't know about it circling for an hour though. With one engine out on a 2 engine aircraft, you land as soon as possible...Even if the aircraft is at or near its maximum weight. You don't spend time on one engine circling around just to burn off a little bit of fuel prior to landing.

Last edited by Brick; Apr 25, 2017 at 2:25 pm
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Old Apr 25, 2017, 2:07 pm
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Sounds like UA pilots handled themselves professionally and as the trained experts they are. I feel bad they have to work for such incompetent business people.
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Old Apr 25, 2017, 2:50 pm
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Sometimes the pilot need time to diagnose exactly what is going on and decide how to proceed. Obviously, if they felt an immediate need to land, they would have done so.
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Old Apr 25, 2017, 2:55 pm
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Originally Posted by formeraa
Sometimes the pilot need time to diagnose exactly what is going on and decide how to proceed. Obviously, if they felt an immediate need to land, they would have done so.
With a gear or flaps issue, sure. You don't take an hour to troubleshoot an engine out issue. Regardless of the cause, when you lose an engine on a 2 engine aircraft, you land immediately at the nearest suitable airport.
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Old Apr 25, 2017, 2:55 pm
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AvHerald classifies this as an "Incident" ... http://avherald.com/h?article=4a8209b2&opt=1
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Old Apr 25, 2017, 3:07 pm
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Originally Posted by Brick
All Boeing 737 models do not have fuel dump capability. They can land at their maximum takeoff weight.
Really? I thought the max takeoff weight for a 738 was 155,500 lbs and the max landing weight was something like 144,000 lbs. (assuming it wasn't a HGW certified model)
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Old Apr 25, 2017, 3:12 pm
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Originally Posted by Hartmann
Really? I thought the max takeoff weight for a 738 was 155,500 lbs and the max landing weight was something like 144,000 lbs. (assuming it wasn't a HGW certified model)
Old but interesting PDF for emergency procedures:

http://www.smartcockpit.com/docs/B73...ht_Landing.pdf
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Old Apr 25, 2017, 3:58 pm
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Originally Posted by Hartmann
Really? I thought the max takeoff weight for a 738 was 155,500 lbs and the max landing weight was something like 144,000 lbs. (assuming it wasn't a HGW certified model)
They burn the difference on takeoff
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Old Apr 25, 2017, 4:01 pm
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Originally Posted by Brick
You don't take an hour to troubleshoot an engine out issue.
Did the engine suddenly fail or did the engine have a problem that required troubleshooting which eventually led to an inflight shutdown?

Originally Posted by Hartmann
I thought the max takeoff weight for a 738 was 155,500 lbs and the max landing weight was something like 144,000 lbs. (assuming it wasn't a HGW certified model)
174,200 and 146,300. That would take around four hours to burn with both engines operating.

Certification rules require the aircraft to withstand, without damage, touchdown at 600fpm (feet per minute) at max landing weight and 360fpm at max takeoff weight. A 360fpm touchdown would be a quite firm landing. An overweight landing inspection would be required but there shouldn't be any damage.
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Old Apr 26, 2017, 1:13 am
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Here's a link to story republished on Yahoo. Warning - typical mistakes that come along with a story reposted on Yahoo. Paragraphs that make no sense, overblown sense of fear, and of course a lengthy mention about Dr. DAO. Article originally written by People Magazine.

https://www.yahoo.com/news/united-ai...020826436.html
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Old Apr 26, 2017, 2:37 am
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This was scary....are UA pilots good and can they be depended on?
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Old Apr 26, 2017, 6:25 am
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Originally Posted by Brick
With a gear or flaps issue, sure. You don't take an hour to troubleshoot an engine out issue. Regardless of the cause, when you lose an engine on a 2 engine aircraft, you land immediately at the nearest suitable airport.
to clarify, the engine wasn't out:

#2 engine indicated overheat. Throttling back extinguished the light. The flight landed slightly overweight.
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Old Apr 26, 2017, 6:34 am
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Originally Posted by Brick
All Boeing 737 models do not have fuel dump capability. They can land at their maximum takeoff weight.

I don't know about it circling for an hour though. With one engine out on a 2 engine aircraft, you land as soon as possible...Even if the aircraft is at or near its maximum weight. You don't spend time on one engine circling around just to burn off a little bit of fuel prior to landing.
Very common to burn off fuel. A plane is designed after all to fly on one engine. It just couldn't continue to destination on one because of safety issue. You don't want to run the risk of the final working engine cutting out. Finally, all planes frequently take off weighing more then what they can land at. You don't land over MLW unless you have to. In this case while needed to land, there was nothing that required them to land at that very moment. Plus burning off fuel means there's less risk of fire during landing.
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