6.7 Crosscheck Concept

Every critical input must be:

1. Entered by PF
2. Verified by PM

Core Rule

“Garbage in → Garbage out.”

Key Principle

The MCDU is a tool:

• It supports the pilot
• It does not replace decision-making

Outcome

A correctly programmed MCDU ensures:

• Accurate navigation
• Efficient flight profile
• Reduced workload