Hii
I have an Airbus 319-100 light (0.1 year old) and it maintenance ratio is 116%, somehow Iv'e got 50% condition rate and of course flights got canceled.
Do you have any idea why?
Thanks
Just because it has a maintenance ratio of 116% doesn't mean it won't go below 50%. The maintenance level goes down with each flight, so the maintenance times have to be scheduled at regular intervals. For most planes, somewhere between 3.5 and 5 hours per day of maintenance is enough to keep it airborn.
Just because it has a maintenance ratio of 116% doesn't mean it won't go below 50%. The maintenance level goes down with each flight, so the maintenance times have to be scheduled at regular intervals. For most planes, somewhere between 3.5 and 5 hours per day of maintenance is enough to keep it airborn.
Thank for the quick reply caithes,
I attached the schedule (please consider Monday schedule the same as Sunday) I deleted some flights from monday a moment ago.
Please tell me if there is something wrong there.
Thanks
If the Monday schedule is like the Sunday schedule, then your plane flies for almost three full days without maintenance (all of Sunday, all of Monday and Tuesday till 1701hrs). That might very well be enough to have your plane go below 50%.
You know, which flight was cancelled - so you should see, what's the maximum time without maintenance in your case here :)
Well thanks for your help
I didn't know that from one busy day my a/c can be in bad condition :)
Thank you very much :)
You are better off with a schedule at 200% than at 101% and planes going down badly on condition.
My rule of thumb is:
Schedule until it is anywhere between 100% and 200%. Some older planes I have are even at 250% or more...the lease is cheap, and if there are no feasible routes to fly, I prefer them to stay on ground. I don't know what server you are at, but if you are on an older server and using old used planes, even 300% MR with a 24-y/o B737 or MD80 is fine. On one of my airlines I have 800% MR on couple of planes because the hub where the plane is based is out of slots, and even with that, the plane is profitable overall. You cannot beat a cheap 22,000 lease on a 737-300 :) I like old planes, because with cheap leases they can fly less. Maintenance is more per flight on old planes, but you only pay maintenance when the plane flies, so it's not a factor. And staff depend on overall flights you schedule with the plane, the only fixed staff are FA and pilots. So for me older planes make lots of sense (if you can, get some :) )
Now, back to MR and scheduling. As Cookie said, the total MR is relevant only if you have regular (preferably same) maintenance intervals during the day/week. Myself, I schedule flight pairs slot permitting 7 days a week. If I decide to put uneven flight schedule (e.g. flight only several days a week) I space the "free periods" evenly. In this case it would be to not have Sunday, Monday with no maintenance and then maintenance at the end of Wednesday, but rather to have the full Monday Schedule placed on Wednesday or Thursday, so you fly only 2 days straight instead of 3 days. But even that might be pushing it.
Thanks for the detail reply rubio :)
If i have low condition a/c can it hurts my demand?
(I mean around 60-80%)
Thanks :)
Aircraft condition is one of the factors that contribute to your image - and the image can increase your flight ratings...
Wouldnt put too many consecutive flights in the schedule but in case there is too much ground time I split a route between 2 planes. Result is that I have an A321 that runs 10 flights before maintenance is available.
Lowest condition is 75%, so its well worth the extra flights. If you dont do this throughout your whole fleet you wont have any noticable image hit.
200% is far to high to get enough Profit. I avoid values higher than 120 and it works even with 100,4 %. To get it without canceled flights, Spread the maintenance time over the week as equally as possible. And if maintenance break is minimum 2:00 hours, always organize a 2:01 Long break.
Try other maintenance Company. African Maintenance is expensive, but condition can go down to somewhat 60% and breaks are used better as engineers are working faster.
Aircrafts earn money when flying, so Limit ground times to get them airborn as quick as possible.
200% is far to high to get enough Profit. I avoid values higher than 120 and it works even with 100,4 %. To get it without canceled flights, Spread the maintenance time over the week as equally as possible. And if maintenance break is minimum 2:00 hours, always organize a 2:01 Long break.
Try other maintenance Company. African Maintenance is expensive, but condition can go down to somewhat 60% and breaks are used better as engineers are working faster.
Aircrafts earn money when flying, so Limit ground times to get them airborn as quick as possible.
That all depends.
200% is nothing on an aged B737-300/400 or MD-80. Even 300% is nothing. Planes still highly profitable.
I tell you what... I can make your new shiny 737 NG or E-jet profitable even with 200% or maybe even 300% MR. Depends on some factors.... but 200% is absolutely not a bad ratio even on newer planes.
I agree with you about African maintenance, they are a bit more expensive but they give you more flight time on a plane.
Hi! I have a very quick question!! I've got a plane whose condition was 50% yesterday at around 21:00 hub time. obviously the next flight was cancelled, and the return. Normally, after the 2 hours maintenance my planes t/o without problem. However, now I have a plane that even after more than 12 hours, it's still nottaking off. When I check the reason: "Insufficient Condition"
Can anyone help?
Please check the schedule. If it is not at the right condition, there won't be an automatic transfer. Otherwise please check if you are running out of money - if you can't pay the maintenance, it won't be done.