737 MCP

[Dream2Jet]

When do you use CRS and when do you use HDG on the MCP for raw data procedures etc? Thanks.

[eckhard]

You use CRS when you want to display the VOR CDI on your EHSI. The CRS knob sets the VOR beam-bar on the required inbound/outbound course.

As 'CRS' is not an actual lateral mode, the CRS setting does not, in itself, affect the AP/FD behaviour; however, if VOR/LOC is the selected lateral model, then the CRS setting will determine the track that the AP/FD follows.

You use HDG if you want the AP/FD to follow the selected heading. This may be used to fly a non-precision approach when LNAV is not available.

Remember that whatever you set on the MCP, it is the FMA that will tell you what the AP/FD is actually referring and following.

[RAT 5]

Dream2Jet: Please tell me little more of what's behind your question. I assume you have SOP profiles in your company. Perhaps you have some questions or misunderstandings. Try to expand you question then we can give you a more useful and comprehensive answer.

[flyboyike]

I doubt there is a company involved here.