What is the maximum speed at which the external cargo hook doors should not be opened or closed?

The maximum speed at which the external cargo hook doors should not be opened or closed is 80 knots calibrated airspeed (KCAS). This limitation is in place to ensure safety and maintain the structural integrity of the aircraft during the operation of the cargo hook system.

Opening or closing the cargo hook doors at speeds above this threshold could lead to adverse aerodynamic effects, such as excessive drag or potential failure of the doors, which could compromise the load being transported and pose a risk to both the aircraft and personnel on board. Additionally, operating within this speed limit ensures that the airframe is not subjected to undue stress or opportunities for malfunction of the cargo hook mechanism, which could have serious implications for mission safety.

Understanding the importance of this speed limitation is crucial for safely conducting operations involving external cargo.