SB 742-1
(b) Seal rocket in MIL-B-131e foil barrier bag and
ROCKET, 3.5 INCH
repack into outer pack.
(4) Additional precautions to be taken during han-
dling:
a. FSC: 1340.
(a)
b. Ammunition type:
Rocket, 3.5-inch. Includes the
Turn off radio frequency (RF) transmitters.
following models: M28A2 (HEAT), M29A2 (practice), and M30
(b)
Avoid exposure to RF fields such as the main
(WP).
beam of RADAR transmitters.
c. The 3.5 inch is a fixed fin stabilized rocket, consisting of
(c)
three major components: warhead, fuze, and motor. For a
Questions regarding EMR field levels should
complete description of these rockets see TM 43-0001-30 and
be cleared with safety office.
the drawings for the particular round. All 3.5 inch rockets
(5)
No historical records exist to indicate that all
with propellant or igniters over 10 years old require replace-
rocket motor shunts are ineffective. The only way to ascertain
ment of propellant and igniters. Replacement propellant must
whether a shunt is effective is by testing.
have a current load authorization. Replacement igniters must
have been reassessed according to paragraph T-7 within 2
years from tentative date of replacement.
Test and measurement equipment and requirements are listed
in table T-1. Specific tests listed in table T-1 are supplemental
a. An RF energy survey should be performed prior to mov- to the general inspection criteria of chapter 2 and the specific
ing lots of 3.5 inch rockets known to have (or suspected of inspection criteria of table T-2. Inspection must not be limited
to these tests.
having) missing or ineffective shorting clips.
b. The maximum electromagnetic radiation (EMR) the 3.5
inch rocket may safely be exposed to in its storage and ship-
Test Requirements
ping configuration with a missing or ineffective clip is 20 volts
Description Identification Inspection
Application
per meter. In a truck or shipping container totally enclosed in
5220-00-313- IRI
Complete
metal, the 3.5 inch rocket can safely withstand EMR at levels
test equip-
3092
round gaging
10 times (200 V/m) greater than in its storage configuration.
ment
c. Following information pertains to movements where
(shielded)
criteria of paragraph T-2b cannot be assured.
Igniter circuit 4925-00-712- IRI, RI, PI
Igniter resis-
tester
0205
tance test
(1) Fiber containers, wooden boxes, or cardboard
boxes do not provide adequate EMR protection. Seal rockets or
container in MIL-B-131E foil barrier bag.
a. Inspection category X, periodic inspection interval - 4
(2) Metal containers do provide adequate shielding for
years.
shipment of 3.5 inch Rockets provided containers have not
been opened.
b. The sampling plan for inspection is according to chap-
(3) Metal containers that have been opened must be ter 2.
resealed by either of the following methods:
(a) Seal with copper or aluminum foil tape. The
Item will be inspected and classified according to chapter 2
electrical conductivity of the entire container is critical to EMR
and table T-2.
protection. To assure conductivity, remove all paint and tar
from the tube in the vicinity of the opening. Securely seal the
opening with copper or aluminum foil tape, attaching tape to
shiny, bare metal.
Classification
Application
Inspection
Inspection
Method
Description
1. Critical:
a. Shorting clip missing or ineffective
All
Visual/Test
b. Exuding filler
M28A2
Visual
c. Leaking WP
M30
Visual
d. Fuze ejection pin missing
M28A2
Visual
M30
e.
M28A2
Visual
Gap between fuze and warhead
M30
2. Major:
a. Nozzle assembly loose, cracked, or distorted
All
Visual
b. Fuze safety band missing
M28A2
Visual
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