happened on one of my last flights

 

 

I can't figure it out... Are you talking about the engine details?

Is it the FLCH light on with VNAV and LNAV?

I don't fly these or know anything about the systems of that aircraft. What i see is the HSI on the right showing something which not on the one on the left. Hmmm or maybe i am wrong.

When FLCH is engaged the VNAV light should extinguish.   Note that the way you can tell which mode you are in is on the PFD which does indicate FLCH.  

I didn't notice the VNAV light!  Maybe it's a corrupted panel state, or PMDG implemented that detail of failure!

LOC/APP not armed while about to intercept the ILS?

Flaps 5 at 180kts, obvious.

Or, the shot was taken right after the VNAV button was pressed when in FLCH... There is a delay before the FLCH light extinguishes :-)

Forgive me if this is the rant of an idiot (and someone who doesn't use complex procedural systems), but......you are heading 160 degrees, and (presumably) turning to 190 degrees. If that is the case, why does the HDG bar show 011 degrees?

You got it, guys.

 

Just for fun i tried to switch over to VNAV after FLCH to see whats happening. But not chance to unlock by switching back to VNAV.  Even disconnect A/P and activating it again

had changed that situation.

 

LOC and G/S did it finally.  

 

base of operation:

 

heading select (end of star)/FLCH below 10.000ft

following downwind, direct/to FAF, LNAV 

VNAV  with the result in FLCH lock

LOC

G/S (FLCH unlock)

Never mind.

Edited October 8, 201411 yr by PHXMD-11

Even disconnect A/P and activating it again

 

had changed that situation.

You need to reset both F/Ds as well.

 

VNAV light is on because you have VNAV armed, as indicated on your PFD. You're currently below the VNAV path and it's waiting to capture.

 

I don't see any indications that only one light can be on... only that one mode can be active.

 

Somewhere in the FCOM it'll say:

 

"4: VNAV Light

Illuminated (green) - the VNAV mode is armed or engaged."

 

I can't provide the page number because this comes from smartcockpit... kinda like an abridged FCOM :rolleyes:

 

All looks normal to me.

 

 

All looks normal to me.

 

Yep...

 

 

 

But not chance to unlock by switching back to VNAV.

 

Always.  Always.  Always pay attention to your FMA.

 

Your FMA shows: FL/CH (VNAV armed - that's what the white VNAV means).

 

This is the same exact concept as in the case where you're on LNAV and have pressed LOC.  LNAV and LOC both remain lit until the LOC is captured and the LOC mode takes over.  In this case, LNAV is shown in green with LOC in white below it.

 

Ralph Freshour doesn't have his videos on the topic out yet, but he's working on a series of MCP tutorial videos that would probably be immensely helpful to you.  All of the ones I've seen are in the 737, but the modes are primarily the same and have similar behavior.  Once he's done, they'll be up at this address: https://www.youtube.com/user/rfresh1011

I missed the white VNAV arm.