If the missile won’t fire, what action should you take with the CLU?

• A. Disconnect and reconnect CLU
• B. Power cycle the FCS only
• C. Call for a new launcher
• D. Ignore and attempt another shot

Answer: (A)

When a missile won’t fire, the first corrective step with the CLU is to disconnect and reconnect the CLU. This action re-seats the control unit and re-establishes all electrical connections, which clears common transient faults or loose contacts that can block arming or safe-fire interlocks. The CLU manages the firing sequence and safety checks, so resetting its connection often restores proper communication and the ability to arm for the next attempt. Power cycling the FCS alone might not refresh the CLU’s internal state or interlocks, and calling for a new launcher or ignoring the fault doesn’t address the underlying wiring or handshake issue. After reseating, verify the system returns to a normal armed state and attempt the shot again.