Ep 8 | TIMED TRAINING TIPS | FMS-CDU EXERCISES - PART 1

[@The.Chiefman]

What a little gem your channel is. So much great information. Thank you so much for all you great work

[@subsonicflighttraining]

You are so welcome!

[@Mike-nu9uc]

Hey, I know this video is two years old. I’m currently doing my SITS in the B767, and have to tell you that this was really helpful, thank you sir.

[@subsonicflighttraining]

Glad it helped! Yes, very similar to the 757/767 FMC...

[@alippay2]

Thanks for your video. Informative as always. Must the LNAV cross flight-path or can it join it as well i.e. not crossing it (or does that depend of speed of closure rate)?

[@subsonicflighttraining]

No, it will capture prior to crossing the LNAV flight path based on 1. Immediate capture if within 2.5 miles, or 2. based on intercept angle and closure rate if more than 2.5 miles...

[@mishmish1968]

Thanks captain , for this very knowledgeable video , i'd love to see more tips of the FMC functionality, as always much appreciated the hard work you put into these magnificent videos. .

[@subsonicflighttraining]

After this series, let me know if there is something else I have not addressed that you would like covered.

[@mishmish1968]

@@subsonicflighttrainingi will , thanks a lot.

[@jtmuzix]

Hello captain, I wasn't going to ask but there is another member on the PSX forum who also has interest in this topic. I and others are curious about specifics with respect to the legacy fmc vs the NG fmc.

[@jtmuzix]

I'm aware of quite a few differences, for example more accurate step size but sometimes, as an outdated instrument rated pilot, I wonder things such as, how do they use this new FMC computer software in real world applications, etc. Whatever you think might be a good material regarding this topic would be appreciated by many if not all. Stay safe and I hope all is well!

[@jtmuzix]

Not to answer my own question but I attempt to follow avionics pretty closely with respect to Thales, Rockwell Collins, and Honeywell; those seem to be the big ones for commercial and only recently I learned that Smiths is now GE. Being a computer nerd, I find this topic especially fascinating. I know Boeing uses mostly Honeywell for their FMC except in the 737ng. Sorry, I just opened a huge can of worms but anything that can be shared would be super amazing.

[@subsonicflighttraining]

In this series of Timed Training Tips (Parts 1-4) on CDU exercises, I will cover some of the differences between the Legacy using PSX and the NG FMC in the 747-8 using PMDG. I do not have the NG PSX upgrade yet, but probably will get it at some point. All the CDU exercises are expected to be understood and fair game on check rides to test FMS knowledge, some are useful in line operations, others you rarely see. But all are practiced during training.

[@subsonicflighttraining]

Yes, Honeywell is the major source of the FMS in the jets I am rated on, 747-400, 747-8, 787, 757,767.

[@Cpt-Pugwash14]

The FMS is by far the hardest part to learn when doing an initial type rating.

[@subsonicflighttraining]

For most people it is, only if it is your first type exposure to glass or to the FMS. These days so many pilots are exposed very early to glass and FMS. So with exposure, it really gets pretty easy when you make subsequent transitions. Back in the day, as they say, when classic 747 guys were transitioning to the 400, most had a heck of a time understanding anything other than round dials, but over time they adapted, but not without struggle.

[@wileybird69]

What would happen if you didn’t put anything in the discontinuity? Just keep flying straight?

[@subsonicflighttraining]

With a Discontinuity, you will get a High Priority FMC Message in the scratchpad around 5 miles warning you of an approaching Discontinuity, if you overfly it LNAV Remains displayed on the PFD, but the jet goes into a HDG HOLD sub mode where it will maintain the heading when you crossed the Discontinuity, and will stay that way until you tell it different…

[@wileybird69]

Gotcha thx!

[@jtmuzix]

very nice. Thank you sir!

[@subsonicflighttraining]

Very welcome

[@SelmanIsHere]

What is the application?

[@subsonicflighttraining]

This is the Aerowinx PSX for the 747-400. It is one of the more expensive platforms at around $300, but it also is one of the most accurate, especially when doing non-normals. I would say it is for the more serious flight simmer, otherwise PMDG has both the 747-400 and 747-8, which is cheaper and good for the more casual flight simmer...