How should an inoperative nav/com functionality be handled in the release?

How should an inoperative nav/com functionality be handled in the release?

• A. If allowed by MEL/CDL, release with stated limitations; otherwise defer the flight or substitute approved equipment and adjust plan.
• B. Release without limitations.
• C. Cancel the flight.
• D. Proceed as normal and ignore MEL/CDL.

Answer: (A)

The key idea is using the MEL/CDL to decide if you can release a flight when nav or comms aren’t working. The MEL/CDL lists which inoperative items can still allow a dispatch with stated limitations, and what compensating measures must be in place. If those limitations are allowed, you may release the flight but with documented constraints and a solid plan to maintain safety—this could involve relying on approved alternate navigation or communication methods, adjusted routing or procedures, and ensuring there is an available alternate airport and appropriate fuel margins. If the MEL/CDL does not permit dispatch with limitations, you must defer the flight or substitute approved equipment and adjust the plan so the aircraft complies with the required capabilities. This approach keeps operations compliant with regulatory requirements and preserves safety by making sure the crew isn’t relying on a system that’s inoperative without a sanctioned workaround. Releasing without limitations or ignoring the MEL/CDL would be unsafe and non-compliant, and canceling is appropriate only when no approved workaround exists.

The key idea is using the MEL/CDL to decide if you can release a flight when nav or comms aren’t working. The MEL/CDL lists which inoperative items can still allow a dispatch with stated limitations, and what compensating measures must be in place. If those limitations are allowed, you may release the flight but with documented constraints and a solid plan to maintain safety—this could involve relying on approved alternate navigation or communication methods, adjusted routing or procedures, and ensuring there is an available alternate airport and appropriate fuel margins. If the MEL/CDL does not permit dispatch with limitations, you must defer the flight or substitute approved equipment and adjust the plan so the aircraft complies with the required capabilities.

This approach keeps operations compliant with regulatory requirements and preserves safety by making sure the crew isn’t relying on a system that’s inoperative without a sanctioned workaround. Releasing without limitations or ignoring the MEL/CDL would be unsafe and non-compliant, and canceling is appropriate only when no approved workaround exists.