For a single-point load with two sling legs, maximum sling leg variation in inches is?

• A. 4 in
• B. 6 in
• C. 8 in
• D. 10 in

Answer: (B)

When lifting a single-point load with two sling legs, keeping the load level is crucial because uneven leg lengths tilt the load and create unequal forces on the sling points and the helicopter, increasing the risk of instability and side loading. The maximum sling leg variation allowed is six inches. This tolerance keeps the load near level during the lift, minimizing tilt and the stresses on attachments and the aircraft. If you measure a difference larger than six inches, re-rig the load by adjusting leg lengths or reconfiguring the rig so the legs are as equal as possible. To check variation, compare the effective lengths of the two legs from the load point to their attachments; the difference should not exceed six inches. Six inches is the standard limit.