Which special service request would indicate the need for specialized equipment for a flight?

The choice indicating the need for specialized equipment for a flight is indeed the one associated with DPNA®, which stands for "Disabled Person, Non-Ambulatory." This special service request is specifically designed to assist passengers with varying levels of mobility, particularly those who may not be able to walk or move independently.

When a passenger requests the DPNA® service, it implies that they will need additional support and equipment to facilitate their boarding, travel, and disembarkation processes. This often includes the use of wheelchairs, boarding chairs, or other mobility aids, as well as the assistance of trained personnel to help navigate through the airport and onto the aircraft.

The other special service requests serve different purposes and do not necessarily indicate a need for said specialized equipment. For instance, FAST® is generally related to fast-track services, BULK® pertains to bulkhead seat requests, and EXST® is for extra support during travel but does not imply the need for specialized equipment specifically. Thus, understanding the nuances of SSR requests helps ensure that passengers receive the appropriate assistance needed based on their individual circumstances.