Newark777
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Crossed Runway Operations

Sun Jan 08, 2006 6:24 am

My question specifically deals with EWR, but I'm sure it applies to other airports as well. When I was listening to my scanner yesterday, most of the planes were landing on 4R at EWR, while some ERJ's were being cleared to land on 11, and these two runways cross at their ends. Sometimes, I would hear the pilot landing on 4R say something to the effect of "Hold short runway 11," and I assume this is because a plane is landing on 11 at the same time. The same thing was sometimes said by the plane landing on 11.

My question is, can two planes be cleared to land on two runways that cross, and be expected to stop in time for the other runway? What would happen if both the planes over-ran?

Here's a diagram of EWR if you aren't familiar with it:
http://204.108.4.16/d-tpp/0513/00285AD.PDF

Harry
Why grab a Heine when you can grab a Busch?
 
pilotpip
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RE: Crossed Runway Operations

Sun Jan 08, 2006 7:24 am

What you are referring to is something called "land and hold short operations". What is happening is just as you guessed it. Two aircraft are operating from different runways that cross. If given this clearance, the pilot has to know he/she can stop before crossing the intersecting runway. You may also hear the tower give them the runway length from threshold to interesection. It is a completely volutary thing and a number of airlines won't do them per their SOPs.

BTW, they're doing the same thing at STL right now with 24 and the 30s.
DMI
 
A3204eva
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RE: Crossed Runway Operations

Sun Jan 08, 2006 7:32 am

BAW don't authorise their pilots for LAHSO

FYI  Smile
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Matt72033
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RE: Crossed Runway Operations

Sun Jan 08, 2006 7:40 am

theres quite a good discussion on it here! RE: Airlines Refusing "hold Short" Ops (by 727EMflyer Oct 11 2005 in Tech Ops)#ID130326
 
Newark777
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RE: Crossed Runway Operations

Sun Jan 08, 2006 12:01 pm

Thanks for the info, didn't know it had a formal name, and thanks for the link, good reading.  Smile

Harry
Why grab a Heine when you can grab a Busch?
 
Tornado82
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RE: Crossed Runway Operations

Sun Jan 08, 2006 12:05 pm

Quoting A3204eva (Reply 2):
BAW don't authorise their pilots for LAHSO

Yet they did authorize their pilots to take a 3-engined 747 from the States to London across the pond. Hmm... I'll take LAHSO over a 3 engined 747 any day.
 
kaddyuk
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RE: Crossed Runway Operations

Sun Jan 08, 2006 12:51 pm

One thing you operate in the USA that they DONT operate in the UK is Conditional Clearance... eg...

LAX Tower: "American 765 Cleared to land AFTER the Company 777 Infront"

or

LAS Tower: "Cactus 445 After the departing Delta 757 cleared for takeoff runway 25" etc...

In the UK, only one aircraft can be cleared to land or takeoff at the same time on the same runway...
Whoever said "laughter is the best medicine" never had Gonorrhea
 
loggat
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RE: Crossed Runway Operations

Sun Jan 08, 2006 12:57 pm

I've never heard that in the US either kaddyuk.

Having said that, maybe you are referring to the fact that 2 or more airplanes can be cleared to land on the same runway. "Cleared to land, number 2"

If they are going to depart an airplane between the first and second plane on approach, they usually will not give the landing clearance to the second plane until the airplane has departed.

I don't think they use the terminology you exampled above.
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Starlionblue
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RE: Crossed Runway Operations

Sun Jan 08, 2006 10:55 pm

Quoting Tornado82 (Reply 5):
Yet they did authorize their pilots to take a 3-engined 747 from the States to London across the pond. Hmm... I'll take LAHSO over a 3 engined 747 any day.

It could be argued that neither is an unsafe procedure. The 747 is quite safe operating on three engines (after all plenty of planes don't even have three engines) and the route across the northern pond is liberally sprinkled with alternates.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
bri2k1
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RE: Crossed Runway Operations

Sun Jan 08, 2006 11:00 pm

Maybe. What would happen if you lost the second engine on one side? I doubt the rudder has enough authority to allow you to keep flying for long. It has four engines because it needs them, and it's certificated to operate with one of them inoperative, not two. It's extremely unlikely, but then again, the first one failed... Airports are specifically designed to operate under LAHSO. As long as pilots and controllers listen carefully, read back instructions correctly, and pay attention, my vote is for LAHSO.
Position and hold
 
A3204eva
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RE: Crossed Runway Operations

Sun Jan 08, 2006 11:07 pm

Quoting Kaddyuk (Reply 6):
One thing you operate in the USA that they DONT operate in the UK is Conditional Clearance... eg...

LAX Tower: "American 765 Cleared to land AFTER the Company 777 Infront"

Not strictly true. VFRs can and sometimes are "Cleared to land, one after", but it is not permitted with IFRs
"They have lady pilots......... they're not that good, but they have 'em"
 
vikkyvik
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RE: Crossed Runway Operations

Mon Jan 09, 2006 3:38 am

Another thread:
Lahso Ops? (by Vikkyvik Nov 10 2003 in Tech Ops)

Many interesting points of view in both posted threads.

~Vik
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Tristarsteve
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RE: Crossed Runway Operations

Mon Jan 09, 2006 6:10 am

Quoting A3204eva (Reply 10):
VFRs can and sometimes are "Cleared to land, one after", but it is not permitted with IFRs

That si something else that BA doesnt allow. Crew are told not to accept VFR clearances, but to stay IFR. Once VFR the crew is responsible for separation, if you are still IFR, the tower is responsible.
 
A3204eva
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RE: Crossed Runway Operations

Mon Jan 09, 2006 9:04 am

I didn't mean IFRs would change to VFRs, I meant VFRs being VFR (ie a 152, piper etc). Is changing to Vs don't happen very often, especially with the bigger a/c  Smile
"They have lady pilots......... they're not that good, but they have 'em"
 
kaddyuk
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RE: Crossed Runway Operations

Mon Jan 09, 2006 11:41 am

Quoting Loggat (Reply 7):
Having said that, maybe you are referring to the fact that 2 or more airplanes can be cleared to land on the same runway. "Cleared to land, number 2"

Thats the one... i wasnt exactly sure of the R/T that might be used, i just know that in the states they can clear more than one aircraft for the same action on the same runway... which they cant in the UK...
Whoever said "laughter is the best medicine" never had Gonorrhea
 
A3204eva
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RE: Crossed Runway Operations

Mon Jan 09, 2006 10:59 pm

The correct R/T (for the UK) is "[callsign] rwy x, land after the [a/c type ahead] winds 220º 8kts". I've used it myself  Smile
"They have lady pilots......... they're not that good, but they have 'em"
 
sprout5199
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RE: Crossed Runway Operations

Tue Jan 10, 2006 12:12 am

As a student pilot(still) I cannot do LAHSO, but here at PBI, I have landed on 13 and as soon as I touched down, the tower told me to taxi to but hold short of 9L. All the airlines here will not do LAHSO but will accept me taxing and holding shortof the other active.
Also have heard 2 planes cleared to land with a departure in between them, with ATC telling the second A/C about the departure

Dan in Jupiter
 
timz
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RE: Crossed Runway Operations

Tue Jan 10, 2006 6:39 am

Quoting Bri2k1 (Reply 9):
What would happen if you lost the second engine on one side? I doubt the rudder has enough authority to allow you to keep flying for long.

If the second engine failed during takeoff, dunno. But the 747 can of course "keep flying" with two out on one side. A go-around would be a struggle, but it can land okay.
 
Mir
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RE: Crossed Runway Operations

Tue Jan 10, 2006 7:20 am

Quoting Kaddyuk (Reply 6):
One thing you operate in the USA that they DONT operate in the UK is Conditional Clearance... eg...

LAX Tower: "American 765 Cleared to land AFTER the Company 777 Infront"

or

LAS Tower: "Cactus 445 After the departing Delta 757 cleared for takeoff runway 25" etc...

I've never heard of the second case (and the phraseology for the first one is incorrect, as others pointed out). Aircraft will be taxied into position on the runway while the other plane is departing, and then it will be given a normal takeoff clearance once the separation is adequate. I've never heard of a plane being told to takeoff after another. I do believe I heard it in FRA, though.

-Mir
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A3204eva
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RE: Crossed Runway Operations

Tue Jan 10, 2006 9:29 am

How odd :S

Aircraft have to have at least 1 minute spacing from time of rolling if of a similar size/bigger and not on the same dep route. It then starts going to 2 then 4 minutes depending on a/c size and dep route.

Was the a/c quite a way from the hold when it was cleared to takeoff after the one ahead?
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timz
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RE: Departure Separation

Tue Jan 10, 2006 9:44 am

Quoting A3204eva (Reply 19):
Aircraft have to have at least 1 minute spacing from time of rolling if of a similar size/bigger and not on the same dep route. It then starts going to 2 then 4 minutes depending on a/c size and dep route.

In the UK, you mean?

Let's say a 747 departs and a 737 is to follow it off the same runway on the same initial route. They need two minutes separation, or what? (In the UK.)
 
A3204eva
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RE: Crossed Runway Operations

Tue Jan 10, 2006 10:45 am

No because the wake off a 747 would be a danger to the 737 if only a two minute spacing was applied.

Medium behind a Heavy on same routing requires between 3 and 4 minutes spacing.
"They have lady pilots......... they're not that good, but they have 'em"
 
timz
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RE: Crossed Runway Operations

Wed Jan 11, 2006 7:00 am

Can the pilot waive it? Do they?

How about a 747 behind a 747, same initial route? 737 behind 737?
 
bri2k1
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RE: Crossed Runway Operations

Wed Jan 11, 2006 8:55 am

A pilot can decline an instruction given by ATC if it would interfere with safety, but they can't ignore regulations. The exception is in an emergency, at which time a pilot can deviate from any regulation necessary to maintain safety. Given that, even if they could, no pilot in his or her right mind would decrease a safety margin. When a pilot requests something that would compromise safety, the controller won't grant it. In fact, some of the regulations provide what the AOPA calls "legal but stupid" minimums -- things that are legal to do (such as VFR flight in 1SM visibitiliy and clear of clouds in class G airspace) but stupid, and a pilot (or airline) should establish their own personal minimums that are more restrictive when necessary. Wake turbulence can be a very nasty animal for the smaller of the two aircraft involved.
Position and hold
 
timz
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RE: Crossed Runway Operations

Thu Jan 12, 2006 7:15 am

Quoting Bri2k1 (Reply 23):
A pilot can decline an instruction given by ATC if it would interfere with safety, but they can't ignore regulations.

Is the 2-minute-or-whatever wake-turbulence separation an instruction?

Quoting Bri2k1 (Reply 23):
Given that, even if they could, no pilot in his or her right mind would decrease a safety margin.

Pilots never waive the separation, except the ones in their wrong minds?

Quoting Bri2k1 (Reply 23):
When a pilot requests something that would compromise safety, the controller won't grant it.

If a pilot waives, the controller will refuse to accept the waiver?
 
SP90
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RE: Crossed Runway Operations

Wed May 24, 2006 4:03 am

Quoting Newark777 (Thread starter):
My question specifically deals with EWR

While I was driving north on the NJ Turnpike this morning, parallel to rwy 4L/22R, a 727-100 came in to land on rwy 29. My question, are they suppose to be flying that low over the highway (~50ft)? On flightaware it looks like they just flew the normal approach for 22L/R, but it is incomplete. Do they make a turn somewhere over the Hudson River somewhere to line up for this rwy?

I believe the plane I saw is N727EC.

http://flightaware.com/live/flight/N727EC/history/20060523/1138Z/KGSO/KEWR

Regards,
DWC

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