krisyyz
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3rd FMC On The 767, PFD

Tue Jan 31, 2012 2:43 pm

Hello,


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Obviously, the display unit on the pedestal is not a full FMC. Is it used for data-link only? How do the pilots input info into this unit, is it touchscreen or do they use one of the primary FMCs like on the 777?

Also, some 767s have a speed-tape on the PFD and some have the fast-slow indication. Is this feature dependent on the CRT hardware or just the software? Do pilots really care which speed indicator they have since there is an analog indicator right next to the PFD?

Thanks,

KrisYYZ
 
Dalmd88
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RE: 3rd FMC On The 767, PFD

Tue Jan 31, 2012 4:10 pm

The display unit on the aft center pedestal is for ACARS only I believe. The center FMC is used only for approach mode and as a back up if the left or right fails. I think the flight planning gets inputted into one of the FMCs and then is copied into the other two.
 
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CrimsonNL
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RE: 3rd FMC On The 767, PFD

Tue Jan 31, 2012 9:04 pm

I know that OS has a very similar device on their F-100's as seen in this picture (it's switched off though)


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From work experience I know that it's a touch screen and at least at OS it's used for ACARS (maybe for other purposes as well)
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Fabo
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RE: 3rd FMC On The 767, PFD

Tue Jan 31, 2012 11:05 pm

Quoting krisyyz (Thread starter):
a full FMC

That is a very common thing, but that is NOT an FMC, neither are the two boxes by the pilots knees.

FMC(s) sit down in the avionics bay. These are CDUs, or MCDUs (control/display units).

Think this way:

the FMC is the computer box:


The CDU is the monitor and the keyboard. You use them to interact with the computer, but they are not the computer itself.
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N243NW
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RE: 3rd FMC On The 767, PFD

Wed Feb 01, 2012 5:42 am

Quoting CrimsonNL (Reply 2):
I know that OS has a very similar device on their F-100's as seen in this picture

So do the older ex-TWA MD-80s (the new ones have the dual MCDUs). The unit is made by Rockwell Collins and is in almost all aspects identical to the one on the F100 (and probably the 767 pictured above, too).


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krisyyz
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RE: 3rd FMC On The 767, PFD

Wed Feb 01, 2012 2:10 pm

Quoting Dalmd88 (Reply 1):
The display unit on the aft center pedestal is for ACARS only I believe
Quoting Fabo (Reply 3):
That is a very common thing, but that is NOT an FMC, neither are the two boxes by the pilots knees.
Quoting N243NW (Reply 4):
The unit is made by Rockwell Collins

Thank you!

KrisYYZ
 
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Jetlagged
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RE: 3rd FMC On The 767, PFD

Thu Feb 02, 2012 12:38 am

Quoting krisyyz (Thread starter):
Obviously, the display unit on the pedestal is not a full FMC. Is it used for data-link only? How do the pilots input info into this unit, is it touchscreen or do they use one of the primary FMCs like on the 777?

The device on the centre pedestal looks like an ACARS CDU. It's not part of the FMS as such, though it might provide data to it (flight plans, clearances, etc).

Quoting krisyyz (Thread starter):
Also, some 767s have a speed-tape on the PFD and some have the fast-slow indication. Is this feature dependent on the CRT hardware or just the software? Do pilots really care which speed indicator they have since there is an analog indicator right next to the PFD?

The choice of speed tape or fast/slow pointer is a customer option. The hardware is the same, it's the software which works differently depending on the programme pin options chosen. The speed tape gives more information to the pilot than a traditional ASI can (stall speed, reference speed, buffet limits, flap extension/retraction cues, speed trend vector, etc). The fast/slow pointer style is a more basic display, directly replicating a traditional ADI. KLM went as far as removing the ASI's altogether on their 737s and 767s as the PFD speedtape made them redundant. Other airlines may have done so too.


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[Edited 2012-02-01 16:40:46]
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krisyyz
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RE: 3rd FMC On The 767, PFD

Thu Feb 02, 2012 2:46 am

Quoting Jetlagged (Reply 6):
The choice of speed tape or fast/slow pointer is a customer option. The hardware is the same, it's the software which works differently depending on the programme pin options chosen. The speed tape gives more information to the pilot than a traditional ASI can (stall speed, reference speed, buffet limits, flap extension/retraction cues, speed trend vector, etc). The fast/slow pointer style is a more basic display, directly replicating a traditional ADI. KLM went as far as removing the ASI's altogether on their 737s and 767s as the PFD speedtape made them redundant. Other airlines may have done so too.

Thanks! That answered by question!

KrisYYz

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