Six Monthly Checks
Storage PMCS Checks are carried out every six months while the launch vehicle is
in storage. They consist of the normal Before PMCS, which includes the deployment
of the A-frame and the cycling of cylinders.
Limitations as to Use Due to Environmental Conditions
The material from which the slings are manufactured is polyester (PES). Polyester is
resistant to chemical attack from mineral acids but can be attacked by strong alkalis.
Take contaminated slings out of service at once, thoroughly soak in water, and allow
to dry naturally. In case of any doubt about the condition of any sling following
Beware of formation of ice at low temperatures, which can have an abrasive or
cutting effect on the slings.
When bridge modules are stowed, water can pool in the inside of the panels. As the
opening slings hang down inside the panels, they can become frozen to the panel in
During non-operational periods when the system is stored at temperatures below 32
degrees Fahrenheit (zero degrees Centigrade) or when freezing is expected to
occur, to prevent the slings freezing to the insides of the bridge sections, all the
module opening slings should be pulled out from the modules so that they hang
Transportation of bridge modules with incorrectly stowed slings may cause system
Prior to transportation, all slings must be re-inserted, using the module sling tool if
Slings should be protected from prolonged exposure to direct sunlight or sources of
Checks Prior to Each Use/Period of Use for Slings
Prior to each use, the sling should be inspected for:
correct identification and specification