AnFI,
The place to let an engine "Flame out" under controlled conditions is at the factory.
Like most gas turbines, the Arrius in the 135 has a preferential injector - one that is not supplied via the metering valve. It's job is to keep the flame alight in the event of rapid deceleration of the engine. It is checked during maintenance to ensure that it does just that. But, like all the others, if it starts blowing air then the fire is out. There is only one fuel supply line to the engine.