> Show me a case where an IN-FLIGHT transponder shutdown is a needed issue When changing squawk codes, it is procedure at most airlines to put the transponder

> Show me a case where an IN-FLIGHT transponder shutdown is a needed issue When changing squawk codes, it is procedure at most airlines to put the transponder into stand-by mode. This prevents inadvertent transmission of incorrect squawks should the pilots mis-key. e.g. once squawk 7500 Hijack is transmitted, ATC must implement appropriate measures regardless of what the crew subsequently do or say. Consider that fact given 7050 is a valid non-emergency squawk. Once the squawk has been confirmed as correct the transponder is returned to active status.