I'm trying to figure out the correct data to enter into the FMC using default values for payload on the PMDG 737-800 flying a very short test route from KSFO to KSJC. I used simbrief and generated a route:

ROUTE ID: DEFRTE
KSFO/28R DCT HEMAN DCT ROKME DCT MUSSK DCT KSJC/30L

Where do I find info for the items circled below in the simbrief file?

Plan fuel - not required - used for planning purposes before you've been refueled (I think)

Crz alt - Put your cruise alt in here, tells VNAV what the cruise alt is for the inflight performance calcs.

Crz wind - not required - used to optimise the arrival time and fuel calcs. Most plans will have an average wind or, failing that, a top of climb wind.

Top of Climb OAT - not required - as above, usually on the plan

Only the cruise alt is required and as to where to find this info, it very much depends on what format the simbrief file (brief?) is.

Hope this helps,

On 11/24/2025 at 11:59 PM, Matt Sdeel said:

I'm trying to figure out the correct data to enter into the FMC using default values for payload on the PMDG 737-800 flying a very short test route from KSFO to KSJC. I used simbrief and generated a route:

ROUTE ID: DEFRTE
KSFO/28R DCT HEMAN DCT ROKME DCT MUSSK DCT KSJC/30L

Where do I find info for the items circled below in the simbrief file?

 

CRZ ALT - You get that from your flight plan, look at your simbrief document for this. 

PLAN - you don't put anything in there, few operators use it during planning stage but others never bother with it.

CRZ WIND - You put T/C winds. Again look at your simbrief generated OFP operation flight plan. 

T/C OAT - Temperature at T/C, Again can be obtained from simbrief OFP. 

If you use Simbrief it will provide that data for you. You read it from your OFP, enter it into your FMS and just like that you are done. Easy Peasy, right?