Only know of TIB1118X which caught fire in 2007...
Go read the accidents thread...TIB1203H caught fire on 21st
August near Bukit Panjang Temporary Bus Park.
But speaking of this, SMRT seems to be lagging in laying up this
bus alongside TIB609C back in September...and now so many O405s got
laid up while this bus is still free.
As for the reason it is not spotted on the roads, I guess SMRT
might want to deal this bus like 1130J case; lay up for half a year
to repair then send for refurbishment and put back on the roads
after it was out of lay up...