The maximum time for ground DC power usage to protect CRT displays is 5 minutes. True or false?

The maximum time for ground DC power usage to protect CRT displays is 5 minutes. True or false?

• A. True
• B. False
• C. Not specified
• D. Cannot determine

Answer: (A)

A limit is placed on how long ground DC power can be applied to protect the cockpit CRT displays. The specified maximum of five minutes helps prevent thermal and electrical stress on the CRTs and their power circuitry when the aircraft is on the ground, reducing the risk of damage or performance issues once you start flight operations. If more time is needed, follow the established procedures to power down and reapply power as required by the aircraft's guidelines.

A limit is placed on how long ground DC power can be applied to protect the cockpit CRT displays. The specified maximum of five minutes helps prevent thermal and electrical stress on the CRTs and their power circuitry when the aircraft is on the ground, reducing the risk of damage or performance issues once you start flight operations. If more time is needed, follow the established procedures to power down and reapply power as required by the aircraft's guidelines.