The DECU is the Digital Engine Control of the Tornado. The system has two redundant channels: one for basic engine control and another for afterburner control. Both channels have self-monitoring functions, meaning that only one of the two redundant channels can activate fuel metering. Should this channel fail or malfunction, the system automatically switches over to the second stand-by redundant channel. In the event of a malfunction, the afterburner channel reverts to fixed default values. Diehl Aerospace is also responsible as system supplier for the DECU.