If an aircraft generator CSD is disconnected in flight, the correct method for re-connection is

• A. In flight
• B. Mechanically on the ground
• C. Electrically from the cockpit
• D. Not possible

Answer: (B)

Reconnecting a generator CSD is a mechanical task that requires proper alignment and engagement of the drive coupling. This kind of re‑connection cannot be done safely in flight because access to the drive train and verification of correct engagement aren’t possible mid‑air. The cockpit has no means to electrically re-connect the CSD; the procedure must be performed on the ground by maintenance personnel, with the engine secured and the system verified through ground checks. That’s why the correct method is to re-connect mechanically on the ground.