Originally Posted by Capn Bloggs
A jet I have flown had two overspeed protection systems; one electric and one mechanical. Either would shut down the engine if the front end (N1) became disconnected from the back end (N2). The electric overspeed protection system was MEL-able. That may be the situation here.
Capn Bloggs, You obviously have no barkin' idea how a multi-spool gas turbine engine works. Day 1 of Basic Gas Turbine theory, and they would of told you that there IS NO CONNECTION between the "front end (N1)...the back end (N2)...."
Originally Posted by FMU
The fact that the engine "command" wiring was cut, and the engine kept operating, although at idle power, comfirms the integrity and robustness of the engine and the FADEC system. The aircraft was NOT at all close to a double engine shutdown.
IMHO this is actually a far bigger problem then the uncontained turbine failure. Can you imagine a situation (in flight) where there is leaking fuel, that is tending to run towards a running engine, but is being carried away by the airstream ? Now imagine landing and having that leaking fuel streaming into a running engine that you had not been able to shut down ? Say like China Airlines Flt 120 in 2007 ? S.T