(04 Apr 2018, 9:14 pm)Shrek wrote Same warning tone both time and oil over the road behind the bus on both occasions from what I've been told.

Three Sapphires had been on the 52/54 most of the day.

Then it could have been a worse issue than initially thought, or the fix may not have addressed the whole issue, with the engineer unaware.  But it would not have been sent out in service if the engineers didn't think it was fit.