# 7.3 Flight Director (FD)

The Flight Director provides guidance via crossbars on the PFD.

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</div>### Key Rule

👉 The aircraft must **follow the FD crossbars**

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</div>### Autopilot Engagement Rule

The autopilot may only be engaged if:

- Aircraft is stable
- **FD crossbars are aligned**
- Aircraft is already following FD commands

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</div>### Core Principle

**“First fly the FD – then engage the autopilot.”**