Any updates to these codes?
An hour or so ago, this showed on expertflyer, for our SEA-OGG flight tomorrow:
FL UL YL SL BL ML HL QL LL VL KL GL TL
I had previously seen F0 U0 etc., but not "L", which they said was something like 'full, but taking standby reservations'.
Now it's showing F1 and "0" for all other classes.
Looks like a bumpy ride

I've never seen the L's before. Oh and the earlier flight is all 0'd out