Field TRIP WIND is in the Fenix MCDU > INIT B/p. 2.  My understanding of this field is that it's prevailing wind at the specified CRZ FL, which can be set to the value provided in AVG WIND in the Simbrief OFP.  However, TRIP WIND has only 5 characters insufficient for the AVG WIND field so the questions are:

• Is this field supposed to be the CRZ FL prevailing wind ?  What's the expected format of the entry....only has 5 characters ?
• If not the CRZ FL wind, what is it for ?  Is this field used ?  Format ? 

You can enter the average head- or tailwind in that field. I am not near my PC right now, but I think the format is HD or TL followed by the average head-/tailwind in knots (for example HD017).

if you import the winds on page INIT A, I’m pretty sure you don’t need to (or can’t) enter the average wind on INIT B.

49 minutes ago, voske said:

think the format is HD or TL followed by the average head-/tailwind in knots

This field allows the entry of a mean wind component for the trip from the origin to the destination. Upon entry of a CO RTE or FROM/TO pair, this field defaults to HD 000 in small font. An entry preceeded by –, H, HD is considered to be headwind, +, T, TL to be tailwind. The entered speed is displayed in large blue font. When the flight crew inserts a wind on the CLIMB, CRUISE or DESCENT WIND page, or on the PERF APP page, the system no longer considers the trip wind, and the corresponding field is dashed.

9 hours ago, zachlog said:

Field TRIP WIND is in the Fenix MCDU > INIT B/p. 2.  My understanding of this field is that it's prevailing wind at the specified CRZ FL, which can be set to the value provided in AVG WIND in the Simbrief OFP.  However, TRIP WIND has only 5 characters insufficient for the AVG WIND field so the questions are:

• Is this field supposed to be the CRZ FL prevailing wind ?  What's the expected format of the entry....only has 5 characters ?
• If not the CRZ FL wind, what is it for ?  Is this field used ?  Format ? 

If you use Navigraph this information is available under "Flight Plan Summary" - "Average Wind"

8 hours ago, polosim said:

This field allows the entry of a mean wind component for the trip from the origin to the destination. Upon entry of a CO RTE or FROM/TO pair, this field defaults to HD 000 in small font. An entry preceeded by –, H, HD is considered to be headwind, +, T, TL to be tailwind. The entered speed is displayed in large blue font. When the flight crew inserts a wind on the CLIMB, CRUISE or DESCENT WIND page, or on the PERF APP page, the system no longer considers the trip wind, and the corresponding field is dashed.

I was expecting to be able to enter CRZ wind with a BRG and MPH format but it looks like here the expectation is to interpret the CRZ wind and direction as either HD or TL wind.....not a big deal.

Thanks !

It's simply the wind factor. Like +7 or -12 for example.