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n27903
Topic Author
Posts: 85
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 5:55 pm

UA 794 is circling off the coast of SFO and has been 4 a long time. Looks like it was going to LIH. N550UA is taking the run. Anyone knowbwhats up?
 
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tlecam
Posts: 1500
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 6:01 pm

Looks like it is making an approach to land now? I wonder if they were trying to get rid of fuel before heading back to SFO.
BOS-LGA-JFK | A:319/20/21, 332/3, 346 || B:717, 735, 737, 738, 739, 752, 753, 762, 763, 764, 787, 772, 744 || MD80, MD90
 
n27903
Topic Author
Posts: 85
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 6:08 pm

Its been circling for 1 and a half hours at 9800ft idk just thought it might be a problem cuz its obviously not a medical problem.
 
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NYPECO
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 7:30 pm

Looks like it landed. Crazy flight path.

http://flightaware.com/live/flight/UAL794

Does anyone know what happened?
 
iahcsr
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 8:42 pm

MX issue obviously .... Don't know what. Flight did cancel. Good it happened just after departure and not half way there.
Working Hard, Flying Right Friendly....
 
roseflyer
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 8:59 pm

10,000ft implies there might have been something related to pressurization. Pressurization / pack problems don't require diverting to the nearest suitable alternate, but you can't fly ETOPS to Hawaii with a pack inoperative.

2 hours in the air might be time to burn off enough fuel to get below max landing weight since a 757 cannot dump fuel.
If you have never designed an airplane part before, let the real designers do the work!
 
mm320cap
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 9:40 pm

Not necessarily pressure related. No sense in climbing if you're coming back to land and trying to burn off gas. The lower the better in that case
 
D L X
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United Flight 794 tech incident: returned safely to SFO.

Tue Mar 17, 2015 9:52 pm

Now that we know that this flight is NOT in trouble, can we change the thread title?
 
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American 767
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 2:08 pm

Quoting D L X (Reply 7):
can we change the thread title?

I just did.

Quoting Roseflyer (Reply 5):
a 757 cannot dump fuel

So the 757 doesn't have fuel jettison nozzles?
Ben Soriano
 
FlyHossD
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 2:42 pm

Quoting American 767 (Reply 8):
So the 757 doesn't have fuel jettison nozzles?

Correct. 757s do not, 767s do have fuel dumping capability.
My statements do not represent my former employer or my current employer and are my opinions only.
 
mcdu
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 3:02 pm

The title "in trouble" is way over the top. The flight had a tech issue that prevented it from continuing. The crew opted to burn fuel to reduce the landing weight. Saying a flight is in trouble for a benign event like this is extremely sensational and definitely unwarranted.
 
DTWPurserBoy
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 3:15 pm

Quoting mcdu (Reply 10):
The title "in trouble" is way over the top.

There is a tendency on a.net for posters to go over the top with sensationalism for minor issues. I wish mods would more vigorously monitor thread titles.
Qualified on Concorde/B707/B720/B727/B737/B747/B757/B767/B777/DC-8/DC-9/DC-10/A319/A320/A330/MD-88-90
 
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CaptSkibi
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 3:24 pm

This Boeing document details the fuel jettison capabilities of their models.
Private Pilot, Airplane Single Engine Land / former frequent flyer with 9 straight years being elite on NW/DL
 
catiii
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 3:33 pm

Quoting DTWPurserBoy (Reply 11):

There is a tendency on a.net for posters to go over the top with sensationalism for minor issues. I wish mods would more vigorously monitor thread titles.

100% agreed. I think the notion of the flight being "in trouble" is what, frankly, is troubling here. UA 794 Air Turnback to SFO is probably more appropriate.
 
modesto2
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 4:10 pm

Quoting FlyHossD (Reply 9):
757s do not, 767s do have fuel dumping capability.

It also depends on the specific model. For example, DL's 767-300ERs have fuel dump capability, but the domestic (non-ER) 767-300s in the fleet do not have this ability.
 
rta
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 4:17 pm

Another United 757 diversion??   
 
qqflyboy
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 5:04 pm

A lower altitude would also facilitate a faster fuel burn.
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D L X
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United Flight 794 tech incident: returned safely to SFO.

Wed Mar 18, 2015 5:07 pm

Quoting American 767 (Reply 8):

Quoting D L X (Reply 7):
can we change the thread title?

I just did.

I don't think the flight was ever "in trouble."

This is a problem developing on a.net. People aren't scouring fr24 and flightaware looking for planes that are circling. These sites put out tweets any time a flight squawks 7700 or diverts, or whatever. Then people who are following these tweets post about it here, saying the flight is "in trouble?!" when they actually do not know what the situation is at all.

The truth is, almost nobody on this site knows anything about the goings on on a particular flight, and the people at these airlines that might know are too busy to say anything about it here, even if they were allowed to.
 
spacecadet
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RE: United Flight 794 Tech Incident: Returned Safely To SFO.

Wed Mar 18, 2015 8:49 pm

Quoting D L X (Reply 17):
Then people who are following these tweets post about it here, saying the flight is "in trouble?!" when they actually do not know what the situation is at all.

I used to get those same alerts on my phone. When you first turn them on, it is actually kind of amazing to find out how many 7700 squawks there are on a daily basis. It's unexpected to see how common they are. So when someone first turns the alerts on, I can see how they would run here and post about the first one they see, because they'd probably think it was very unusual and an accident in process. I think that's behind a lot of threads (or at least thread titles) like this one.
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Grummancat
Posts: 133
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RE: United Flight 794 Tech Incident: Returned Safely To SFO.

Wed Mar 18, 2015 9:01 pm

Quoting NYPECO (Reply 3):
Looks like it landed. Crazy flight path.

At least the pilot wasn't drawing 'gentlemen's sausages' like that florida guy the other day XD
 
rugger
Posts: 394
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RE: United Flight 794 Tech Incident: Returned Safely To SFO.

Wed Mar 18, 2015 9:17 pm

I wonder if they offered the meal service while they were burning off fuel? After all this was just a common occurrence, nothing to worry about.
 
DTWPurserBoy
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RE: United Flight 794 Tech Incident: Returned Safely To SFO.

Wed Mar 18, 2015 11:32 pm

Quoting Rugger (Reply 20):
I wonder if they offered the meal service while they were burning off fuel? After all this was just a common occurrence, nothing to worry about.

Depends on what the captain orders. If the purser asks "should we go ahead and serve meals" he/she might say yes, might say no. Too many variables. If the PIC thinks it will take 2 hours to burn off fuel they might say OK. If he/she thinks they might get approval for a heavy landing they will say no. Plus if the problem occurred right after takeoff on a flight to LIH the food would not even have started to cook--that takes 25-30 minutes alone (only a rookie f/a would start the ovens on the ground, especially on a flight of that length). There is nothing worse than starting the ovens and having a return to the gate or a cancellation--there is no where to hide that you will be safe from the wrath of hungry pax.
Qualified on Concorde/B707/B720/B727/B737/B747/B757/B767/B777/DC-8/DC-9/DC-10/A319/A320/A330/MD-88-90
 
benjjk
Posts: 388
Joined: Fri Aug 08, 2014 4:29 am

RE: United Flight 794 Tech Incident: Returned Safely To SFO.

Thu Mar 19, 2015 1:37 am

Quoting D L X (Reply 17):
I don't think the flight was ever "in trouble."

This is a problem developing on a.net. People aren't scouring fr24 and flightaware looking for planes that are circling. These sites put out tweets any time a flight squawks 7700 or diverts, or whatever. Then people who are following these tweets post about it here, saying the flight is "in trouble?!" when they actually do not know what the situation is at all.

The truth is, almost nobody on this site knows anything about the goings on on a particular flight, and the people at these airlines that might know are too busy to say anything about it here, even if they were allowed to.

I completely agree, it's not just a.net though. It's amusing when an enthusiast website live-tweets a 7700 and it's picked up by a journalist, before too long there's a "pray for __" hashtag... all for what is most of the time a non-event.

Quoting D L X (Reply 17):
I used to get those same alerts on my phone. When you first turn them on, it is actually kind of amazing to find out how many 7700 squawks there are on a daily basis. It's unexpected to see how common they are. So when someone first turns the alerts on, I can see how they would run here and post about the first one they see, because they'd probably think it was very unusual and an accident in process. I think that's behind a lot of threads (or at least thread titles) like this one.

True, and I must admit that before I started getting the alerts on my phone I would have thought that every 7700 meant something serious, rather than what is most often a relatively benign turnback. Now I get 2-3 alerts per day which, to be honest, is starting to drive me a bit nuts.

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