PW4056 engine EEC Channel Reset to B by pulling fire handle

Date:         29 Nov 97 03:24:26 
From:         Exiled Expat <lutsch@emirates.net.ae>
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Does anyone know why the PW4056 engine resets the EEC to Channel B when
the fire handle is pulled?  Why did the designers choose B and not A?
I am currently on the engine course but the instructor has never been
able to find this info out.

Thanks,
Grounded Spanner