jon b

EICAS: FMC vs FMC MESSAGE?

Recommended Posts

Hi, I’m just wondering about the message that pops up on EICAS When you have an FMC Scatchpad message?

The sim gives the EICAS message “FMC” which always makes me jump as I associate it with the message ‘FMC LEFT,RIGHT” which signifies a potentially troublesome FMC failure.

Im not sure if this message is one of the many company specific options but certainly on my aircraft an FMC scratchpad generates the EICAS message “FMC MESSAGE ‘

I Know the message has been “FMC” since the legacy versions, which I was involved in testing and advising on , but I can’t remember if I raised the question at the time so it may well be company specific or if not it’s probably my fault for not raising it 12 years previously !

I have a picture of an EICAS “FMC MESSAGE “  for your enjoyment, but not sure how to attach it to a post.

cheers Jon Bunting 

 

 


Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Weird thing for me is, when I flew the plane in FSX, it always said FMC MESSAGE. When I flew it in P3D V4, I only ever saw it read FMC.

Share this post


Link to post
Share on other sites

Thanks Kevin, then perhaps it’s my memory that’s at fault or it’s the FS9 version I’m remembering. The real world version I operate  at least,has FMC MESSAGE, just wondering if the “FMC” EICAS may have slipped through if it’s not a company specific option?

Jon Bunting

 

Share this post


Link to post
Share on other sites
36 minutes ago, jon b said:

Thanks Kevin, then perhaps it’s my memory that’s at fault or it’s the FS9 version I’m remembering. The real world version I operate  at least,has FMC MESSAGE, just wondering if the “FMC” EICAS may have slipped through if it’s not a company specific option?

Jon Bunting

 

Funny you mention this because I saw the same "FMC" EICAS message the other day flying the PMDG SQ B777.  I agree with you that this message should in fact be careted on the B744 because it is not found in the QRH and read " >FMC MESSAGE ".

Bertie G

Share this post


Link to post
Share on other sites

Now that’s interesting, because as you say Bertie you would expect FMC MESSAGE to be careted as there is no QRH action, and indeed it has a caret on John’s photo above. And yet I have a photo here (which I’m not sure how to post)I took the other night on the aircraft of FMC MESSAGE without a caret !

Now, this particular FMC MESSAGE was triggered by a CPDLC comm established scratchpad message.I wonder if there is a difference between internal FMC generated scratchpad messages and ones generated by CPDLC activity? Or perhaps a different software version on the aircraft.

Jon Bunting  

Share this post


Link to post
Share on other sites

A video from my screen from two months ago, but starting at 5:48:00, you can see it read just FMC. This is P3D V4.

 

Share this post


Link to post
Share on other sites
Posted (edited)

As I recall, a white FMC status is a prompt about data uplinks for the FMC. Amber FMC MESSAGE means there’s a scratchpad warning message that needs attention. 

Edited by kevinh

Share this post


Link to post
Share on other sites
On 5/24/2018 at 1:50 PM, kevinh said:

As I recall, a white FMC status is a prompt about data uplinks for the FMC. Amber FMC MESSAGE means there’s a scratchpad warning message that needs attention. 

I think you maybe thinking about the EICAS memo messages“ ATC MESSAGE”  or “ACARS MESSAGE” which are in white.

There’s the Amber “FMC LEFT”. “FMC RIGHT” and “FMC MESSAGE” EICAS advisories but no EICAS or memo message which just states “FMC”, to the best of my knowledge. Jon Bunting

Share this post


Link to post
Share on other sites

You guys should submit a support ticket or make sure you let them know somehow 🙂

 

Share this post


Link to post
Share on other sites

Yep, I’ll submit a ticket if that’s the right thing to do. I just thought I’d post here first to make sure it wasn’t correctly modelled on some other variation of software I wasn’t familiar with. This thing has so many variations and options it’s easy to make a fool of your self by pointing a finger at something you’ve personally not seen before.

cheers

Jon Bunting 

Share this post


Link to post
Share on other sites
Posted (edited)

There was a Boeing Service Letter 747-SL-31-092 (8 Nov 2010) which mentioned this:

Quote

34: >FMC MESSAGE ... C.... Revised to add caret to make this message applicable to 747-400 IDS systems with new FMC.

Do they mean the NG software? And does it apply to those aircraft which don't have new FMCs?

Surely they didn't have NG FMCs back in 2010?

Edited by Qavion2

Share this post


Link to post
Share on other sites

As of last week my jet, with the original FMCs , was throwing out FMC MESSAGE without a caret !

Maybe they’ve changed their mind again, who knows. 

Jon Bunting 

Share this post


Link to post
Share on other sites
Posted (edited)
2 hours ago, jon b said:

Maybe they’ve changed their mind again, who knows

My photo was taken in 2013.... Who knows 😋

(EDIT: A QRH dated 2015 shows "FMC MESSAGE")

Edited by Qavion2

Share this post


Link to post
Share on other sites
On 5/25/2018 at 11:16 PM, jon b said:

I think you maybe thinking about the EICAS memo messages“ ATC MESSAGE”  or “ACARS MESSAGE” which are in white.

There’s the Amber “FMC LEFT”. “FMC RIGHT” and “FMC MESSAGE” EICAS advisories but no EICAS or memo message which just states “FMC”, to the best of my knowledge. Jon Bunting

No, it's definitely "FMC" in white. Perhaps it's only in the 777?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now