MWO 10-1670-269-55-1
1. PURPOSE. The Modified Improved Reserve Parachute System Soft Loop Center Pull
(MIRPS-SLCP) is an engineering enhancement to the currently fielded MIRPS pack tray (and
ripcord assembly). This enhancement eliminates the potential for cone-lock, while also providing
added ripcord protection. The MIRPS-SCLP enhancement was designed and tested as a retrofit
to the current MIRPS pack tray and ripcord assembly.
Pictured in Figures 1 and 2 below, the MIRPS-SLCP enhancement eliminates the metal locking
cones and cone mating hardware employed on the standard MIRPS pack tray and replaces them
with standardized grommets and soft closing loops (similar to those used in Military Free Fall
parachute systems). Additionally, a center pull ripcord handle replaces the standard side pull
ripcord handle. The center pull ripcord handle incorporates two separated ripcord cables and
pins to independently engage each respective soft loop. A textile (elastomer) ripcord pocket is
installed on the top flap of the pack tray that ends up covered by the inspection flap when the flap
is closed.
Retrofit of the current MIRPS pack tray to incorporate the MIRPS-SLCP enhancement is a
relatively simple process wherein several components (e.g., metal locking cones, pack fasteners,
etc.) are removed from the current MIRPS pack tray and new MIRPS-SLCP components are
installed. The center pull ripcord handle is made from modifying the current side pull ripcord grip
handle.
2. PRIORITY. This modification is classified as URGENT.
a. Equipment in Use. All MIRPS Pack Trays will be modified and completed no later than the
scheduled completion date. MIRPS Pack Trays not modified after the expiration of the MWO
completion date will be reported as Non Mission Capable (NMC), in accordance with applicable
Army regulations. The MWO will be applied to unserviceable assets awaiting scheduled
Organizational Maintenance providing the scheduled repair restores the MIRPS Pack Trays back
to a Fully Mission Capable (FMC) status.
b. Equipment in Wholesale Depot Supply or Maintenance Activities. The MWO will be
applied to serviceable MIRPS Pack Trays prior to issue and/or subsequent to the scheduled
completion date.
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