Something interesting about SBS993K (BNDEP 42), it's blue seats
are unchanged but it's green seats were changed to those
refurbished type. Of course it's ducts were refurbishe.
If the ducts are refurbed, I guess it's safe already..as for the
seats, I guess it's probably gonna be stuck on Sv 42 forever till
its expiry happens in 2 years then. Its current demand might not
justify the need to refurb all the seats if you think about it.