MD-11 FMS Gotcha's
02-08-2007, 06:51 PM
#31
Gets all holidays off
Joined APC: Feb 2005
Position: Retired UPS 767 Captain, SDF Z
Posts: 431
Originally Posted by MAWK90
Not an FMS question, but why do we start #3 first? I understand that you press sys 3 w/the aux pump prior to start, and the only thing I can come up with is engine 3 powering hydro system 3 for brakes.
Anybody with the "official" answer?
Anybody with the "official" answer?
In my case, it's done for the comfort of the tropical fish in back (actually it's all for MY comfort)!
02-08-2007, 07:00 PM
#32
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Thread Starter
Joined APC: Aug 2006
Position: Michael Vick's favorite animal
Posts: 267
Originally Posted by fr8rcaptain
3-1-2 is the fastest way to get the packs running during start, assuming you're using APU air for start. As soon as 3 is going, the 1-3 isol valve closes and the #3 enging BRV supplies bleed air to the #3pack. when #1 is started next, the 1-2 isol valve closes allowing pack #1 to run....
In my case, it's done for the comfort of the tropical fish in back (actually it's all for MY comfort)!
In my case, it's done for the comfort of the tropical fish in back (actually it's all for MY comfort)!
Thanks for the insight. Old Boeing guy getting prepped for the Glass House!
02-08-2007, 07:03 PM
#33
Gets all holidays off
Joined APC: Feb 2005
Position: Retired UPS 767 Captain, SDF Z
Posts: 431
Originally Posted by MAWK90
Thanks for the insight. Old Boeing guy getting prepped for the Glass House!
"max thrust, check essential!"
02-08-2007, 07:15 PM
#34
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Joined APC: Jul 2005
Position: 777
Posts: 358
Originally Posted by MAWK90
Not an FMS question, but why do we start #3 first? I understand that you press sys 3 w/the aux pump prior to start, and the only thing I can come up with is engine 3 powering hydro system 3 for brakes.
Anybody with the "official" answer?
Anybody with the "official" answer?
WG
Last edited by Worldguy; 02-08-2007 at 07:17 PM. Reason: edit
02-08-2007, 08:29 PM
#36
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Joined APC: Sep 2006
Position: Retired
Posts: 3,717
Originally Posted by MAWK90
Not an FMS question, but why do we start #3 first? I understand that you press sys 3 w/the aux pump prior to start, and the only thing I can come up with is engine 3 powering hydro system 3 for brakes.
Anybody with the "official" answer?
Anybody with the "official" answer?
, but it seems to me that you are correct in your assumption of why the number 3 motor is started first. From my limited systems knowledge, it seems to me that the two brake systems on the MD-11 are supplied by hydraulics from the number 1 and 3 engines. It'd be nice to have brakes, once you get a motor started. I don't believe it has anything to do with electrics or air conditioning. But then again, I'm old, with a very short memory, and it's late, and bingo at the old folks home tonight just plain wore me out.
02-08-2007, 11:21 PM
#38
gets every day off
Joined APC: Mar 2006
Position: Retired MD11 Capt
Posts: 705
Originally Posted by Jetjok
It's been almost a year since my Mad Dog days , but it seems to me that you are correct in your assumption of why the number 3 motor is started first. From my limited systems knowledge, it seems to me that the two brake systems on the MD-11 are supplied by hydraulics from the number 1 and 3 engines. It'd be nice to have brakes, once you get a motor started. I don't believe it has anything to do with electrics or air conditioning. But then again, I'm old, with a very short memory, and it's late, and bingo at the old folks home tonight just plain wore me out.
, but it seems to me that you are correct in your assumption of why the number 3 motor is started first. From my limited systems knowledge, it seems to me that the two brake systems on the MD-11 are supplied by hydraulics from the number 1 and 3 engines. It'd be nice to have brakes, once you get a motor started. I don't believe it has anything to do with electrics or air conditioning. But then again, I'm old, with a very short memory, and it's late, and bingo at the old folks home tonight just plain wore me out.
02-09-2007, 02:42 AM
#39
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Joined APC: Apr 2006
Position: MD-11 Captain
Posts: 4,304
Originally Posted by fr8rcaptain
Actually it was all designed by the same engineer that did the ac essential priority on the old 727...(also 3-1-2)
"max thrust, check essential!"
"max thrust, check essential!"
Regards,
Mark
02-09-2007, 07:16 PM
#40
Indian Takeout Driver
Joined APC: Mar 2006
Position: FAR part 347 (91+121+135)
Posts: 1,566
Originally Posted by MAWK90
Rank your top 5 MD-11 FMS Gotcha's. Example would be "cleared to intercept the localizer" 35 miles out and forgetting to hard tune the ILS Freq/inbound course outside of 25 miles.
I've flown FMS on.. CRJ, Citation V, and X and all of them were significantly snappier.. this thing moves almost in reverse!
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