Hello Aviators...just FYI.
On the 12th of December at 1600UTC KUL ATC will be
upgrading the existing system at SZB ATCC. Kindly be informed
that there might be some teething problems during the
morning rush hour at 130000utc onwards. There might
be some unexpected delays in obtaining ATC from Clearance
Delivery. Carry some extra fuel on your way back into KLIA(should there
be any unexpected holdings due to computer glitches).
Hope this could be helpful to you.