Figure 3-22.—Combination wire rope and chain sling.
Chains
Chains are generally used in combination with one
of the other types of sling construction. See figure 3-22.
A chain with a chain adjuster provides a simplified
method of shifting the lifting point on a sling to match
the component’s center of gravity under a variety of
hoisting configurations.
LIFTING SLING MAINTENANCE
Load-bearing cables, chains, straps, and other
structural members of hoisting and restraining devices
are subject to wear and deterioration. It is necessary that
these components be inspected and lubricated
periodically to ensure safe and proper operation. On
initial receipt of equipment or return of equipment from
depot-level repair, the aircraft intermediate
maintenance department will perform a visual
inspection of the hardware for missing or damaged
components. Upon completion of the inspection, they
tag all equipment in accordance with the Inspection and
Proofload Testing of Lifting Slings and Restraining
Devices for Aircraft and Related Components manual,
NAVAIR 17-1-114.
Preinstallation Inspection
Prior to each use, or once a month as in the case of
emergency handling slings, a complete visual inspection
of the wire rope, fabric or webbing, structural steel or
aluminum, and chain slings must be performed.
WARNING
Slings failing to pass the inspections, or slings
suspected of having been used during
hoisting operations beyond the rated
capacity of the sling, will not be used under
any circumstance. Unserviceable slings are
forwarded to the applicable Aircraft
Intermediate Maintenance Department for
further analysis and disposition.
3-34
