"MGB fire warning light? that's new to me, what is suposed to be on fire? the oil in the MGB?

" Aser
It is suppose to detect a hydraulics fire. The sensors are positioned near hydraulic components and in the oil cooler. It is in the MGB compartment so that is why it is labelled 'MGB FIRE'. There are two sensors at each point and both need to be activated before the crew have to do anything.