Altitude change greater than 4,000 feet above FL310 requires joint approval. True or false?

• A. True
• B. False
• C. Not specified
• D. Only with dispatcher approval

Answer: (A)

When operating at high altitude, large changes in cruise altitude must be coordinated between the flight crew and the dispatcher. If the planned altitude change is more than 4,000 feet above FL310, it requires joint approval before you go ahead. This coordination ensures the new altitude fits the aircraft’s performance, fuel requirements, weather and turbulence considerations, and airspace/ATC constraints. It also confirms that both the captain and the dispatcher agree on the most safe and efficient plan. Small altitude tweaks can be handled within the crew’s discretion, but bigger changes above FL310 prompt this required collaboration to keep the flight within safety and operational guidelines.