MSYYZ From Canada, joined Oct 2005, 851 posts, RR: 8 Posted (8 years 8 months 4 weeks 17 hours ago) and read 3400 times:
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 .
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.
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Starlionblue From Greenland, joined Feb 2004, 17173 posts, RR: 66
Reply 4, posted (8 years 8 months 4 weeks 16 hours ago) and read 3374 times:
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.
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LTU932 From Germany, joined Jan 2006, 13864 posts, RR: 50
Reply 5, posted (8 years 8 months 4 weeks ago) and read 3218 times:
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.
Zeke From Hong Kong, joined Dec 2006, 9229 posts, RR: 76
Reply 6, posted (8 years 8 months 3 weeks 6 days 23 hours ago) and read 3211 times:
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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