Originally Posted by
jsloan
SQ will typically only release business or first award seats to partners on the (older) 772 or A330, although you could always luck into an equipment change.
SIN-BNE and SIN-SYD are two of the routes where people have occasionally been able to redeem UA miles for J seats on the otherwise forbidden aircraft (77W, 380, and now the 350). Though it is contrary to published rules and very much the exception.