text: External Loads
  AIRCRAFT LOAD LIMITATIONS
  5-48. The structural strength of the cargo hook assembly determines the maximum weight that any
  aircraft can carry with an external slingload. In most cases, the tensile strength of the hook does not limit
  the weight that an aircraft can lift; the allowable cargo load does. In fact, the capacity of the cargo hook
  assembly usually exceeds the ACL.
  TENSILE STRENGTH
  5-49. Cargo hook tensile strengths for US Army aircraft show—
  y UH-1H/UH-1N Iroquois – 4,000 or 5,000 pounds (Figure 5-13).
  y UH-60A/60L Blackhawks – 8,000 or 9,000 pounds (Figure 5-14).
  y CH-47D Chinook – 26,000 pounds (Figure 5-15, page 5-18).
  Figure 5-13. UH-1H Iroquois and its cargo hook.