I wanted to reset it due to its fault as SPD flag appeared on it.
On the overhead circuit breaker panel you pull the CB Circuit Breaker F12 for 5 Seconds and then push it in.
This is the standard reset for the ISIS. But this was no use as the ISIS had an internal failure in the SPD Speed function. So I had to raise it as Deffered item according to the MEL Minimum Equipment List.
Also, I wanted to perform its internal test. So I pressed the upper two buttons together.
This brought the test menu into display.
There were two options:
Operational Test
Display Test
So I've chosen the operational test. But also the SPD function appeared to having internal failure.
Ref. HZ-AS54
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