What is the purpose of the SVCE INT OVRD switch?

What is the purpose of the SVCE INT OVRD switch?

• A. Allows the Service Interphone to operate when the aircraft is on jacks.
• B. Connects the Flight Deck handset to the Cabin Interphone system.
• C. Enables PA from the Audio Control Panel.
• D. Activates the interphone when the aircraft is started.

Answer: (A)

The switch is used to allow the service interphone to work during ground maintenance when the aircraft is on jacks. Normally, the service interphone is inhibited in that condition, but selecting this override re-enables it so ground crew can communicate with the cockpit or cabin as needed while the aircraft is supported on jacks. This function is specific to the service interphone and is not about connecting the flight deck handset to the cabin interphone, enabling PA, or automatic interphone activation at start.

The switch is used to allow the service interphone to work during ground maintenance when the aircraft is on jacks. Normally, the service interphone is inhibited in that condition, but selecting this override re-enables it so ground crew can communicate with the cockpit or cabin as needed while the aircraft is supported on jacks. This function is specific to the service interphone and is not about connecting the flight deck handset to the cabin interphone, enabling PA, or automatic interphone activation at start.