What is the reference for the 10k and 25k sling legs?

The reference for the 10k and 25k sling legs is found in TM 4-48.09. This technical manual specifically covers the rigging techniques and guidelines for aerial delivery operations, including the use of sling loads. It includes detailed information about the specifications, capabilities, and applications of different sling load components, including the 10,000-pound and 25,000-pound rated sling legs, which are crucial for safely lifting and transporting various payloads by helicopter.

Understanding this reference is vital for personnel involved in sling load operations, as it provides the necessary standards and operational procedures to ensure safety and effectiveness during these types of missions. The other references listed do not specifically address these particular sling leg ratings or the rigging methods associated with them, highlighting the importance of TM 4-48.09 as the appropriate source for these details.