Simultaneous LAndings on Crossing Runways
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Simultaneous LAndings on Crossing Runways
Hi,
I was a pax on a flight into YMML recently where two runways were in operation for landings. As our flight touched down, another flight touched down on a crossign runway. Both planes had slowed to a 'taxi speed' (guessing around 30kph) before reaching the runway intersection (we got there about 30 seconds to a minute before the other plane).
Is this a normal practice? What would be the protocol if both planes had to go around?
Since this is a busy airport in a country with an excellent safety record, I am sure it is safe - I am just curious about how the safety margins are managed in this situation.
Cheers,
Chaz
Frequent SLF.
I was a pax on a flight into YMML recently where two runways were in operation for landings. As our flight touched down, another flight touched down on a crossign runway. Both planes had slowed to a 'taxi speed' (guessing around 30kph) before reaching the runway intersection (we got there about 30 seconds to a minute before the other plane).
Is this a normal practice? What would be the protocol if both planes had to go around?
Since this is a busy airport in a country with an excellent safety record, I am sure it is safe - I am just curious about how the safety margins are managed in this situation.
Cheers,
Chaz
Frequent SLF.
Join Date: Sep 2005
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LAHSO
Land and Hold Short Operations
Certain aircraft with suitably qualified pilots can be given an instruction to land and hold short of the intersection. Traffic given to both aircraft on each other. Only one of them needs to hold short.
Yes it is/would be interesting if they both went around.
RI
Certain aircraft with suitably qualified pilots can be given an instruction to land and hold short of the intersection. Traffic given to both aircraft on each other. Only one of them needs to hold short.
Yes it is/would be interesting if they both went around.
RI
Join Date: Apr 2008
Location: Stavanger, Norway
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I have been working at ENZV in Norway earlier, which has two intersection runways 11/29 and 18/36.
One thing is to issue "cleared to land rwy 18, hold short of rwy 11".. but what do you if the first one has a braking problem - or as stated here, execute a go-around?
First of all, you don't want two aircrafts to even theoretically be at the same point/position at any given time. That is good safety practice. so what we did was make sure there was some spacing between them (if you're working in the tower, you're allowed to use visual separation - as long as you can assure that two aircraft won't hit each other, you decide the separation in.. well.. meters if you really want).
so how I did it was:
aircraft-a: "cleared to land rwy 18, expect to hold short of intersecting rwy 11"
and then.. as soon as it was on the ground, and slowing down, I issued the instruction to "hold short of rwy 11", and then issued cleared to land for number 2 on the crossing runway.
worth to mention is that in Norway (maybe all countries using ICAO) you're not allowed to issue a landing clearance for number 2 before "number 1 has passed the rwy threshold and it is certain that it will vacate the runway prior to number 2 is over the threshold" - unlike FAA-rules where you can be issued "cleared to land as number 5" or something like that.
One thing is to issue "cleared to land rwy 18, hold short of rwy 11".. but what do you if the first one has a braking problem - or as stated here, execute a go-around?
First of all, you don't want two aircrafts to even theoretically be at the same point/position at any given time. That is good safety practice. so what we did was make sure there was some spacing between them (if you're working in the tower, you're allowed to use visual separation - as long as you can assure that two aircraft won't hit each other, you decide the separation in.. well.. meters if you really want).
so how I did it was:
aircraft-a: "cleared to land rwy 18, expect to hold short of intersecting rwy 11"
and then.. as soon as it was on the ground, and slowing down, I issued the instruction to "hold short of rwy 11", and then issued cleared to land for number 2 on the crossing runway.
worth to mention is that in Norway (maybe all countries using ICAO) you're not allowed to issue a landing clearance for number 2 before "number 1 has passed the rwy threshold and it is certain that it will vacate the runway prior to number 2 is over the threshold" - unlike FAA-rules where you can be issued "cleared to land as number 5" or something like that.
Join Date: Feb 2008
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at melbourne, where Land and Hold Short Ops/LAHSO is common practice, the distance between the threshold of runway 34 and the intersection with runway 27 (ie. the point where the aircraft must hold short) is actually longer than all of runway 27. Runway 27 is long enough to land a 744, so there is plenty of room on 34 when LAHSO is in operation.
To participate in LAHSO, pilot's require specific approvals. Australian domestic carriers (QF, VB, JST and REX) can participate, some Air New Zealand flights can also. I'm not sure if Tiger have approval or not yet.
The arrivals are timed where so that even if everything went wrong that possibly could - ie brake failures, go around etc... - all at once, the aircraft still shouldn't hit each other.
With regards to a go around/missed approach - the standard procedure is to turn both aircraft to the right. There are minimum visibility criteria that must be met for LAHSO to be approved, so the two aircraft are able to see each other.
To participate in LAHSO, pilot's require specific approvals. Australian domestic carriers (QF, VB, JST and REX) can participate, some Air New Zealand flights can also. I'm not sure if Tiger have approval or not yet.
The arrivals are timed where so that even if everything went wrong that possibly could - ie brake failures, go around etc... - all at once, the aircraft still shouldn't hit each other.
With regards to a go around/missed approach - the standard procedure is to turn both aircraft to the right. There are minimum visibility criteria that must be met for LAHSO to be approved, so the two aircraft are able to see each other.
