MWO 10-1670-293-20-2
1. PURPOSE. The purpose of this Modification Work Order (MWO) is to replace the existing D-
ring sewn into the personnel harness. During a dynamic torso mannequin drop test, fractures
have occurred at the web bar portion of the existing D-ring causing a complete separation from
the parachute harness when the reserve canopy fully inflates. Follow-on tests indicated that the
web bar portion of the existing D-ring has the potential for failure under extreme load conditions.
The replacement D-ring has a removable screw with synthetic locking device. Two options are
available for installation. Option 1 The new D-ring will be positioned immediately below the
existing D-ring and screwed in place. The existing D-ring will be rotated upward and secured to
the main lift web. Option 2 The existing D-ring will be removed (cut off) from the harness and
the new D-ring will be placed in the same location as the old D-ring and screwed in place. Option
2 is the alternate approved method, however. The cutting tool necessary for this alternate method
will not be provided through this MWO.
2. PRIORITY. This modification is classified as URGENT.
a. Equipment in Use. All Parachute Harnesses will be modified and completed no later than
the scheduled completion date. Parachute Harnesses 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 material during
scheduled Organizational Maintenance providing the scheduled repair renders the parachute
harness Fully Mission Capable (FMC).
b. Equipment in Wholesale Depot Supply or Maintenance Activities. The MWO will be
accomplished on serviceable Parachute Harnesses prior to issue and/or subsequent to the
scheduled completion date.
3. END ITEM OR SYSTEM TO BE MODIFIED. This modification will apply to all Parachute
Personnel, Type: 35-Foot Diameter that utilizes the Harness, Personnel, Parachute.
Table 1. End Item to be modified
Nomenclature
National Stock
Type and
CAGEC
Serial
Line Item
Number
Model
Number
Number LIN)
Parachute, Personnel
1670-01-262-2359
MC1-1C
81337
ALL
N67788
Type, 35-Foot
Parachute, Personnel
1670-00-598-0751
MC1-1B
81337
ALL
N67788
Type, 35-Foot
Parachute, Personnel
1670-01-248-9502
T-10C
81337
ALL
N67925
Type, 35-Foot
4. MODULES (Components, Assemblies, Subassemblies, Boards, and Cards) TO BE
MODIFIED. Not applicable.
5. PART(s) TO BE MODIFIED. Harness, Personnel, Parachute.
6. APPLICATION.
a. Time Compliance Schedule: The MWO effective date is 01 May 2002 and the completion
date is 30 April 2005.
b. Level of Maintenance: Unit Level Maintenance is the lowest level of maintenance to
support this MWO.
1
