MSYYZ
Topic Author
Posts: 665
Joined: Sat Oct 22, 2005 11:16 pm

### How Long Between Long Haul Flights..

I am just wondering , is there a recommendation from Airline Manufacturers regarding how long should a long-hauler stay on the ground between 2 long haul flights ? Or it depends on the Airline's operation policy ?
Another question , is it a normal procedure for Airlines to use a long-hauler on a short-haul high density route between 2 long-haul flights ?
Any answer is much appreciated .
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747luvr
Posts: 331
Joined: Thu Jul 21, 2005 1:39 am

### RE: How Long Between Long Haul Flights..

In order to give the a/c a 'rest'?

jush
Posts: 1495
Joined: Sat Apr 09, 2005 2:10 am

### RE: How Long Between Long Haul Flights..

 Quoting 747LUVR (Reply 1):In order to give the a/c a 'rest'?

He might mean something like engine cool down or so. Can't imagine anything else.
Can't give you any answer though only that engines are cooling down in descent already cause they're quite a long time almost idle.

Regards
jush
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MSYYZ
Topic Author
Posts: 665
Joined: Sat Oct 22, 2005 11:16 pm

### RE: How Long Between Long Haul Flights..

 Quoting 747LUVR (Reply 1):In order to give the a/c a 'rest'?

That's exactly what i mean .
A346,A343,A342,A332,A333,A310,A300,AB6,A319,A320,A321,B741,B744,B777,B767,B732,B735,B727,B707,B757,MD80,F-70,E-170,B738

Starlionblue
Posts: 17952
Joined: Fri Feb 27, 2004 9:54 pm

### RE: How Long Between Long Haul Flights..

 Quoting MSYYZ (Reply 3):Quoting 747LUVR (Reply 1): In order to give the a/c a 'rest'? That's exactly what i mean .

There's really no need for a rest. That is, the requirements for fueling, catering, unloading and loading of cargo and pax will in almost all cases exceed any need for a rest. The only thing I can think of is brake cooling time, but with new carbon discs it's not a problem unless maybe you just rejected a take-off.

The other reason for a "rest" is maintenance.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo

LTU932
Posts: 13277
Joined: Fri Jan 06, 2006 12:34 am

### RE: How Long Between Long Haul Flights..

 Quoting Starlionblue (Reply 4):The only thing I can think of is brake cooling time, but with new carbon discs it's not a problem unless maybe you just rejected a take-off.

I recall the A343 needs lots of brake cooling time, since those brakes are used up much more than the others due to the insufficient reverse thrust those CFM56 produce. Please correct me if I'm wrong on that.
Sometimes the only thing more dangerous than a question is an answer. - Ferengi Rule of Acquisition 208

zeke
Posts: 11443
Joined: Thu Dec 14, 2006 1:42 pm

### RE: How Long Between Long Haul Flights..

 Quoting LTU932 (Reply 5):I recall the A343 needs lots of brake cooling time, since those brakes are used up much more than the others due to the insufficient reverse thrust those CFM56 produce. Please correct me if I'm wrong on that.

We have recorded the brake cool down times in our manuals. Can have brake temps at 500 deg 60 minutes before pushback and still will be cool enough for takeoff, they dont get anywhere near this. Outside air temperature was found to have little effect on cool down times, wind speed does.
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