Originally Posted by
Lockhart
The only indication of a uncontained engine failure to the flight crew, is when they rotate the fire switch a second time to release the squib.
If the fire light remains on for approximately 30sec, then the engine is considered uncontained then you need to return ASAP.
If the light goes out it's an engine severe damage as per the QRH, though sometimes you need to look outside the square to asses the situation.
They did declare a mayday so that fire light would of stayed on or if it went out then a CC member only need to communicate a fire is still visible.
I’m curious about your statement above. Do you have some form of reference, from anywhere ? I’ve never heard of it, and it doesn’t make much sense. Caveat - I don’t know everything and I haven’t heard everything.
The fire light remaining illuminated on a Boeing, indicates that the temperature at the sensor remains above a specified threshold.