number of broken wires. Replace cables exhibiting rust
and development of broken wires in the vicinity of
attached fittings. Replace wire ropes evidencing bulges,
core protrusions, or excessive reductions in rope
FABRIC OR WEBBING.Fabric or webbing
straps must be visually inspected for cuts, holes, severe
abrasions, mildew, dry rot, broken stitches, frays and
deterioration. Deterioration may be caused by contact
with foreign materials such as oil, fuel, solvents, caustic
fluids, dirt, and lye. The existence of any of the above
conditions renders the sling unserviceable. Twists,
knots, and similar distortions must be corrected before
STRUCTURAL STEEL OR ALUMINUM.
Visually inspect all terminals, shackles, lugs, and
structural members for misalignment, wear, corrosion,
deformation, loosening, slippage, fractures, open welds,
pitting, and gouges. Examine slides and screw adjusters
for burrs, misalignment, and ease of operation. Inspect
sling attachment bolts and pins for elongation, wear,
deformed threads, and other signs of imminent failure.
CHAINS.Chains will be visually inspected for
stretched links, wear, gouges, open welds, fractures,
kinks, knots, and corrosion. Chain attachment fittings
and adjusters will be examined for security, wear,
corrosion and deformation.
Lubrication, Transportation, and
Examine and lubricate all slings once a month in
accordance with NAVAIR 17-1-114. When
transporting slings, they will be carried at all times.
Dragging slings over floors, runways, decks, and
obstructions can cut or severely abrade the material.
This malpractice results in an unserviceable sling.
Whenever possible, slings should be stored indoors in a
clean, dry, well-ventilated area so as to be protected
from moisture, salt atmosphere, and acids of all types.
In addition, slings constructed with nylon or other fabric
materials will be stored in such a way as to prevent
contact with sharp objects, high temperatures, and
sunlight. Fabric materials deteriorate rapidly from
prolonged exposure to sunlight or excessive
heatseverely reducing strength and service life. Where
practicable, slings will be securely fastened to overhead
storage racks to prevent accidental damage. Avoid
laying slings on ash or concrete floors.
There are many restrictions to hoisting for each type
of aircraft. Most hoisting restrictions are the same as for
jacking aircraft. If you violate any of these restrictions,
there is a good chance that you will have an accident,
damage the aircraft, or injure someone. The restrictions
generally concern aircraft gross weight and
configuration. Some of the considerations are access
(stress) panels on or off, external stores on or off, and
wings, folded or spread.
There are many factors that can affect the safety of
the aircraft and personnel during hoisting operation. For
details on restrictions and for the proper installation of
any sling, consult the applicable MIM. Dont forget that
many squadrons have their own local standing
instructions for hoisting aircraft that contain additional
safety precautions and restrictions. You must know
Prior to carrier operation, aircraft hoist points are
inspected for serviceability and easy excess in an
emergency. For details on how to accomplish this
inspection on your aircraft, consult the applicable MIM.
Learning Objective: Recognize the procedures
for the safe raising and lowering of aircraft by
the proper use of aircraft jacks. Identify the
various types of jacks presently found in the
The following text will familiarize you with the
various types of jacks, their use, and general safety
procedures. You will become familiar with jack
identification, preoperational inspections, and jacking
All aircraft hydraulic jacks are either axle or
airframe (tripod) jacks. These jacks use standard,
authorized aircraft hydraulic fluid. They have a safety
bypass valve that prevents damage when a load in excess
of 10 percent over the rated capacity is applied. For
example, the safety valve on a 10-ton jack will bypass
fluid at 11 tons of pressure.
Use axle jacks for raising one main landing gear or
nose gear of an aircraft for maintenance of tires,