PPRuNe Forums - Flight log

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Hello guys,

A question about the flight log.
When should we fill the Landing Mass (which is the TOM - the trip fuel used), in the log ?
Is it a flight preparation thing : so in that case the LDM is determined by subtracting the planned trip fuel to the TOM.
or an in-flight stuff : before the descent, taking the LDM estimated by the FMS for example, and by doing TOM - LDM , it will give us the trip fuel used (approximately).

How you guys proceed?
it's just mostly a question about regulation/rules I would say
Thanks!

You should ask your company. I suspect it is used to validate fuel burns for the flight plans, not sure if it is regulatory, no requirement for it where I work. Where I used to work we put in the actual landing weight not the planned weight.

Thanks for your answer :)
well...actually both way are done in my airline, that is why I wanted to see if there was a rule about it, I haven't find it yet indeed.