Jump to content

Archived

This topic is now archived and is closed to further replies.

kmw510

FMC SIDS and STARS MEA considerations

Recommended Posts

When double checking the programming of the FMC for the SIDS and STARS I can see where the program almost always enters hard altitude and speed requirements, however, it is difficult to tell whether or not the segment MEAs are being considered. For the most part it appears that the predicted altitudes do not violate the MEAs but I am unsure as to whether the FMC actually considered the MEAs since the numbers are shown as predicted rather than required values. In only a few cases have I substituted a required altitude to cover the MEA shown on the charts but don't know if this was a mistake in the programming of the STAR or SID or where the FMC just doesn't consider MEAs.

 

Kevin W

Share this post


Link to post
Share on other sites

The FMC doesn't consider MEAs, but the SID does. Don't make things too complicated


Matt Cee

Share this post


Link to post
Share on other sites

The FMC doesn't consider MEAs, but the SID does. Don't make things too complicated

Im not sure I understand your statement. I understand that the SID charts show MEAs in segments where applicable, however, Im not sure that the airinc data loaded into the FMC when you select that SID contains those altitude constraints. I can see where altitude constraints defined on the chart at fixes show up as altitude constraints in bold in the FMC but don't see corresponding bold entries for any MEAs

 

Kevin W

Share this post


Link to post
Share on other sites

 

 


In only a few cases have I substituted a required altitude to cover the MEA shown on the charts but don't know if this was a mistake in the programming of the STAR or SID or where the FMC just doesn't consider MEAs.

 

Im not sure I understand your statement. I understand that the SID charts show MEAs in segments where applicable, however, Im not sure that the airinc data loaded into the FMC when you select that SID contains those altitude constraints. I can see where altitude constraints defined on the chart at fixes show up as altitude constraints in bold in the FMC but don't see corresponding bold entries for any MEAs

 

Kevin W

RW, I've never seen anyone check against those MEAs unless there was an issue with needing a lower altitude because of a malfunction, or whatnot. That's not to say what you're asking isn't correct.

 

I'd say if you're on the STAR or SID, those routes have already been flight-checked and you shouldn't be worrying about the MEAs if you are on the route.

 

I don't have a reference for you to refer to, sorry.


Matt Cee

Share this post


Link to post
Share on other sites

Any hard constraints in a SID or STAR have been designed for and checked against terrain and any applicable other constraints.  Any other altitudes shown do take MEA into account.

 

DJ

Share this post


Link to post
Share on other sites

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    50%
    $12,655.00 of $25,000.00 Donate Now
×
×
  • Create New...