MIL-PRF-27260D
3.9
Environmental conditions.
The tie down shall be capable of satisfactory operation in various worldwide environmental
conditions expected to be encountered during aircraft loading and unloading operations and long
term storage to include the following conditions:
a.
Fungus growth as may be encountered in tropical climates (see 4.7.3.1).
b.
Humidity of 100% (see 4.7.3.2).
c.
Salt spray as may be encountered in a salt sea atmosphere (see 4.7.3.3).
d.
Exposure to blowing sand and dust as may be encountered in desert regions
(see 4.7.3.4).
e.
Vibration incident to service use (see 4.7.3.5).
f.
A minimum low temperature of -65 °F (see 4.7.3.6).
g.
A maximum high temperature of 160 °F (see 4.7.3.7).
h.
Solar radiation as may be encountered in hot climates or from direct exposure to
sunlight, showing no signs of degradation (see 4.7.3.8).
3.10 Durability.
The tie down shall be designed to perform in its intended environment (see 3.9) for a minimum of
30 years continuous use with no loss of function or safety (see 4.7.5).
3.11 Interchangeability.
All parts having the same manufacturer's part number shall be functionally and
dimensionally interchangeable (see 4.6).
3.12 Item identification.
The tie down major components (strap, fixed hook, and adjustable hook assemblies) shall be
permanently marked for identification in accordance with MIL-STD-130. The identification shall
include the contract number, vendor, and contractor CAGE code (see 4.6). The following special
marking shall be included:
5000 Lb. CAP (see 4.6).
3.13 Safety.
The tie downs shall be functional without sharp edges, burrs, or protrusions that might injure
personnel or prevent the safe operation of the tie downs in areas of the aircraft with limited access
or movement. Operation of the tie down assembly shall not present undue hazards to aircrew
and ground support personnel during tie down of cargo while the cargo is secured, during the
release of cargo restraint, or during removal or stowage of the tie downs. Normal operation shall
not present cutting, pinching, stabbing, nor abrupt impact hazards to personnel. Tie down straps
shall not have defects such as holes, cuts, tears, splices, or abrasions which may cause strap
failure and result in injury to personnel or damage to cargo. The strap shall also be free of
grease, oil, dirt, or any other foreign matter that is not removable without damaging the strap and
degrading its strength (see 4.6).
3.14 Toxic chemicals, hazardous substances, and ozone depleting chemicals (ODCs).
The use of toxic chemicals, hazardous substances, or ODCs shall be avoided (see 4.6).
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