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Author Topic: [-] Pilot and crew increase 737 300/400 to 800/900  (Read 191 times)

Offline MarkM

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[-] Pilot and crew increase 737 300/400 to 800/900
« on: July 14, 2015, 08:47:54 PM »
I believe there may be an issue with the settings for one or more of 727-300/400 and the 737-800/900 (have not flown the other models yet) pilot and crew needs. I am not sure what end it is on but when going from 737-400 to a 737-800 I am having to increase by 10 pilots and 10 crew for a 7 plane rotation. The specs on both of these planes are 2 pilot and 4 crew Y162 standard. My configurations were YP110, CS10 on both models. I am failing to see why I need to increase my personnel for this change. In addition to this I was also adding pilots and crew to the 737-300 to 737-800 change 10 pilots and this time 20 crew. I do know that going from the 300 too 800 is a one crew increase and I expected to go up some but I believe it should only be 10? I am not sure if it was the older 737-300/400 or the 737-800/900 which is wrong but one of them needs to be addressed. This costs a significant amount of capital for the additional personal and either this needs to be felt earlier to weed more airlines out or fix the over need and relieving the additional costs. If their is another reason for the increase could you please explain that to me as well as there is no announcement for example additional crew needed at such a such date and if so that should effect both planes at that date and not when switching so I can not think of a good reason other than something is off.

Thanks, Mark.
« Last Edit: July 14, 2015, 08:51:32 PM by sami »

Offline Sami

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Re: Pilot and crew increase 737 300/400 to 800/900
« Reply #1 on: July 14, 2015, 08:50:59 PM »
The staff numbers are calculated based on a math formula that takes into account the aircraft size based on the average MTOW of the fleet group. This is made to model the fact that usually larger aircraft operate longer routes and require larger amount of crews to be rosters due to layover restrictions. However the downside is that if looking down to the last sigle digit of the crew members, such transition from similar fleet to another 1-to-1 will create these slightly higher numbers. But it's not a bug, but a way it's been designed and no easy way to change it currently.

Offline MarkM

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Re: [-] Pilot and crew increase 737 300/400 to 800/900
« Reply #2 on: July 14, 2015, 09:24:57 PM »
OK, then there is still an issue. I have gone in most cases to reduced MTOW and reduced range as they better fit my needs. If the calculation is based off of MTOW and it is lower then in fact it should either go down or stay the same. The fact that it went up would say that somewhere there is an issue with either the older or the newer calculation and would ask that you look at this.

Please, Mark.

Offline Sami

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Re: [-] Pilot and crew increase 737 300/400 to 800/900
« Reply #3 on: July 14, 2015, 09:29:10 PM »
MTOW compared of 737oldgen vs 737newgen was the difference in the MTOWs I was talking about.

(this has been discussed in the past, some longer time ago, and was back then checked more closely)

Offline MarkM

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Re: [-] Pilot and crew increase 737 300/400 to 800/900
« Reply #4 on: July 14, 2015, 09:40:47 PM »
OK so going from CFM56-3B2 150 000 lbs (+5.2 tn MTOW)  43 830 lbs Payload vs. range Range map  2530 NM  6 658 lbs / hr 
To either 800 with CFM56-7B  172 501 lbs (+7.7 tn MTOW)  44 701 lbs Payload vs. range Range map  2990 NM  5 666 lbs / hr  I can see the increase here. Even though they are on the same roughts.
The 900 with CFM56-7B          164 000 lbs (Standard)  43 720 lbs Payload vs. range Range map  2140 NM  5 512 lbs / hr  has a reduced range and still has the increase. The MTOW already costs us more for the take off and landings so we get punished twice for no growth in company I guess I will just keep buying and running the old plans that are still in production like some of my competitors are doing to get around this.

Thanks Mark.

 

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