MIL-PRF-5806H
the blade during testing shall not exceed the fragility limits specified by the blade manufacturer
(see 6.2). See 4.4.8 for verification provisions.
3.3.6 Fasteners. Quick latching non-removable fasteners shall be used to secure the top of the
box. At most, only common hand tools shall be required to open and close the box (see 4.4.9).
3.3.7 Rodent protection. When the box is closed and ready for shipment, any openings in the
exterior shall be covered with corrosion-resistant material that will prevent rodents from entering
the box (see 4.4.10).
3.3.8 Spray protection. The box shall be designed to prevent spray or rainwater from contacting
the rotor blades when the box is in a normal shipping position (see 4.4.11).
3.3.9 Drainage. Provisions shall be incorporated to insure that every pocket in which water
might collect inside or on top of the box (when the box is in the normal shipping position) is
provided with a means of drainage (see 4.4.12).
3.3.10 Ventilation. A means of ventilation of the inside of the box shall be provided. There shall
be free passage of air to all sections of the box (see 4.4.13).
3.3.11 Moisture resistance. Interior supports/cushioning that are in contact with the blade shall
be made of material which does not retain moisture (see 4.4.14).
3.3.12 Blade records receptacle. A waterproof receptacle shall be provided on one end of the
box for a logbook or record and blade removal/installation instructions. The receptacle shall be of
just sufficient size to permit easy insertion and removal of the necessary records. It shall be
accessible only from outside the box. The receptacle shall be so designed and constructed as to
prevent entry of water into the storage box (see 4.4.15).
3.3.12.1 Receptacle cover. The receptacle cover shall be permanently attached to the box by
some means that will not interfere with accessibility to the receptacle contents. The cover shall be
capable of being removed and replaced by hand or common hand tools. The cover shall not be a
structural part of the box. Provisions shall be made for sealing the receptacle so that opening it
would be detected readily (see 4.4.15.1).
3.3.13 Skids. When a skid pattern has been approved for a particular rotor blade box, that
pattern shall be required on all future designs unless otherwise specified. When skids are not
used, a means shall be provided to prevent abrasion of the box shell caused by skidding.
Clearance between stacked boxes shall be a minimum of 3 inches to accommodate forklift tines.
When skids are used, they shall be easily removed and replaced using common hand tools. The
lower inch of the skid ends shall be designed for ease of sliding, flat or tipped, over uneven
surfaces without damage to skid or box (see 4.4.16).
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