SB 742-1
b. SUPPLEMENTARY CHARGE PART
NUMBER
Heat sealed barrier or plastic bagged items are to be
8838203. Polyethylene supplementary charge pads (DWG
considered equivalent to hermetically sealed
8838203, rev D) in 155mm, M549A1 HERA projectiles
items. Heat sealed material will not be opened
may be compressed to less than 1/16-inch thickness.
unless there is evidence of moisture or damage to
This condition occurs when projectiles are assembled with
package contents.
energy absorbing lifting plugs which have an intrusion
Where capabilities exist, opened containers will be
depth -inch longer than shock attenuating or "G" type
resealed IAW Chapter 2; otherwise use
lifting plugs.
Compressed polyethylene pads do not
repackaging procedures IAW Chapter 3, TM 9-
present a safety hazard during storage, transportation,
1377-200-20. Installed life begins on the date
handling, or firing and are not to be considered a defect.
the container was opened. All opened containers
c. SUPPLEMENTARY CHARGE NSN 1320-00-824-
(hermetically sealed and barrier/plastic bag) will
be repacked and appropriately marked. Mark 0811 PART NUMBER 8797090
each opened/repacked CAD/PAD container:
"OPENED (date as applicable)" in a conspicuous Charges manufactured prior to April 1987 are no longer
authorized for use in Army Maintenance of
place. Markings can be hand written using an
howitzer projectiles. Pending replacement of
indelible marker. Each layer of packing will be
pads, charges may only be assembled to
marked with container open date. A tag, with
cartridge, 4.2 inch, HE M329 series.
applicable "OPENED (date)" markings, will also
be secured to the outer pack. This is to allow All affected wholesale and retail bulk stock (unit returns)
identification and verification of remaining
are to be reclassified to condition code "F". This
installed life of container contents. DSR cards
appendix does not apply to charges already
must be annotated with container open date
assembled to ammunition. Proving grounds are
(month/year). Opened containers will be given
exempt from compliance with appendix.
highest priority of shipment/use.
(a) Acceptable charge manufactured in
accordance with drawing 8797090 revision p (and
a. Surveillance inspections of 90-mm, M371A1 subsequent revisions) has an oversize pad that causes
No charge to be firmly wedged into projectile.
cartridges will be limited to visual inspections.
disassembly is authorized.
(b) Presence of oversize pad reduces
b. Nose cap removal will be performed only as part of likelihood that supplementary charge is displaced should
an authorized screening or renovation operation at a projectile be rammed without fuze or plug. Over run of
prescribed maintenance facility. Unauthorized nose cap charge and consequent in-bore explosion is thus
removal and reassembly has been determined to allow prevented.
metal particle contamination of nose, resulting in possible
premature functioning of the fuze and projectile.
a. Many explosive components such as primers,
ignition cartridges, and delay elements require a
deterioration check test according to the applicable
MIL-SPEC to assure suitability for use before assembly
into a complete round. A successful test will allow the
Rounds assembled with the older M157 cartridge case component to be used for a period of up to 2 years.
that used an adhesive and lock ring system have been
b. Lots of explosive components without current
suspended.
In that system looseness between the deterioration check test will be assigned CC-D and held as
cartridge case and projectile was a major defect. The is, pending a requirement for use.
latest model cartridge case, the M205, is mechanically
secured to the projectile.
Since there may be some
c. Explosive component lots requiring a deterioration
shrinkage in the case material, relative motion may occur check test may be tested by the storing installation for
between the M205 cartridge case and the projectile. If the local use. Prior to performing the test, telephonic or
cartridge case is intact (without cracks), the ignition written notification to the office in para 1-5d(1) must be
element secured to the case, and the cartridge case is not made to assure that a local test will not duplicate test
separated from the projectile, the round will be considered efforts underway or completed elsewhere.
serviceable.
d. Deterioration check tests of explosive components
will be reported to the office in para 1-5d(1) by DA Form
984 with documentation necessary for test evaluation.
a. MIL-C-50417, Amendment 2.
The defect
classification for supplementary charges with loose pellets,
e. The office in para 1-5d(1) will periodically issue
as shown in MIL-C-50417, amendment 2, is applicable for letter instructions. Components that require testing will
new manufacture only and will not be used during be listed by model and type.
inspection of fielded stocks.
Loose pellets are not
f. When subject materiel is to be shipped between
considered cause for rejection of supplementary charges in
CONUS installations and the item has a current test, the
either
bulk
pack
or
assembled
in
complete
receiving installation should be contacted by the shipping
rounds/projectiles.
installation.
This contact is to determine that the
remaining portion of the required test interval will not
expire prior to the intended date of use for the item.
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