What is a key step to perform the PDIs on the ELT Type C?

The key step to perform the Pre-Delivery Inspection (PDI) on the ELT Type C is to ensure proper stowage. Proper stowage is critical because it guarantees that the emergency locator transmitter is securely stored and ready for activation when needed. If the ELT is not stored correctly, it may not function effectively in an emergency situation. Ensuring that it is easily accessible and correctly secured is vital for both operational readiness and safety. This step helps prevent any issues that could arise from movement during flight, which might render the device unusable in an emergency.

While checking the battery life, inspecting the surrounding area for hazards, and documenting the inspection results are important steps in a comprehensive PDI process, they are secondary to ensuring that the device itself is stored in a way that guarantees its readiness for use.