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View Full Version : Fire Warning Test B733/4 vs B738


Red Moyayo
20th May 2004, 03:28
I have a question which is driving me nuts.

When conducting the engine/apu fire warning test on the B737-300 and 400, the fire warning lights on the glareshield and the fire warning handles on the centre pedestal illuminate together.

On the B737-800 the fire warning lights on the glareshield seem to light up approximately 1-1.5 seconds before the fire warning handles on the centre pedestal.

I know it is not much but it is definitely a noticeable difference, generally because I cancel the warning and then have to do it again when it is set off a second time by the fire warning handles.

Does anyone know the difference in the warning system that causes this?

Captain Stable
20th May 2004, 13:45
Are you sure you're not getting the first warning on the glareshield panel from the Overheat detection, the second from the Fire detection?

Cap 56
22nd May 2004, 14:49
Are you sure that an overheat will trigger the fire cue ?