SB 742-1
seconds)
h. Fuze not set on SQ
M48A3
Visual
M51A5
M557
i. Booster cup damaged or loose pellets
Visual
j. Fuze fails torque test
Manual
k. Crack in setting window
M577, M582
Visual
l. Fuze not set to "S" position
M565
Visual
m. Liquid Crystal Display not blank.
M767
Visual
n. Humidity Indicator Card Missing
All
Visual
o. Polyethylene Cushion missing
All
Visual
3. Minor:
a. Firing pin closing disc or foil missing or damaged Para X-6e
Visual
b. Ogive loose (does not interfere with setting sleeve) or M48-series, M51-series
Visual/Manual
M557
exhibits vertical movement
c. Set line in improper position for shipping
M513-series, M514-series
Visual
M728-series, M732-series
d. Marking Incorrect or Illegible
All
Visual
e. Evidence of poor workmanship
All
Visual
i. M728 and M514A1E1 (M514A3) fuzes will be classified
defective if index line is off the 10 second shipping position by
a. Fuzes assembled to complete cartridge rounds will be 3-seconds or more.
removed from cartridge prior to testing. Torque is to be applied
j. Crack in setting window is a major defect if it pierces the
in the direction of increasing time and with a continuous
motion. Desirable method is to complete test in one revolution window permitting entry of moisture or obstructs view of
of setting (lower) cap. In case of an over-run when setting fuze setting scale. Surface stress marks/cracks are not defects.
on "safe" or "MA", cap will not be backed off but rotated
k. Fuze not set on "S" position is considered a major defect
through a complete cycle.
for M565 fuze model.
When discovered "OFF-S" during
inspection, reset samples to "S." There is no hazard for use,
b. Proximity (non-metallic ogive).
handling or transportation.
c. All fuzes with booster.
l. M564 fuzes, which have verniers over 1 interval to right
d. All MT, MTSQ and 3 proximity fuzes (M514A3, M728 or left of "S" position, are considered critical defectives. If
and M732) listed in Table X-1 require a torque test.
encountered, investigate possibility that fuzes could be field
returns, not representative of lot.
e. All except proximity and solid nose types.
m. The humidity indicator card packed with the M767
f. Disposition of fuzes bulk packed or assembled to
complete rounds that fail torque requirements but not Electronic Time Fuze (1390-N290) contains disposition
instructions for the card and/or the item, based on the level of
sufficient in number to reject entire lot will be as follows:
humidity indicated on the card. Fuzes are packaged in groups
(1) Fuzes from bulk pack lots will be authorized for of eight inside a vacuum-sealed barrier bag. The humidity
local destruction.
indicator card is inside the barrier bag. Open the barrier bag
to read the card when the bag is opened for inspections IAW
(2) Fuzes removed from cartridges for test will be
reassembled to round, tagged, segregated and reported
for the purpose of checking the humidity indicator card.
according to provisions of this supply bulletin.
Follow the guidance on the card with regard to the humidity
g. Packs selected for item inspection purposes will be kept reading.
to a minimum. Additionally, all subject packs which are
opened will be marked "Surveillance Samples: not to be
shipped until entire lot quantity is exhausted" and used on a
recurring basis for future inspections.
h. When opening bulk pack fuzes in M2A1 cans for item
inspection purposes, containers will be left open for a
minimum amount of time.
(1) When possible, desiccant packed in M2A1
container will be replaced with fresh desiccant prior to repack.
(2) Desiccant to be reused, and Styrofoam packing
supports removed from M2A1 cans must be stored in an
approved desiccant container during item inspection. When
containers are not available, Styrofoam supports and desiccant
will be placed back into M2A1 cans immediately after fuze
samples have been removed. Cans will then be closed and not
re-opened until fuzes are repackaged.
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