188.8.131.52 Equipment verification. -The government inspector will maintain,
independent of the contractor, a set of standards and may cycle these
standards through the equipment at any time. Failure of equipment to
reject standards will be evidence that the equipment is not properly
adjusted and the contractor will be so notified.
4.4.4 Soundness verification. -After equipment checkout and verification
as specified in 4.4.3 and 184.108.40.206 the entire lot sample will be inspected
with the equipment operating automatically. Any rejected unit of the
sample will be automatically cycled through the equipment with the CAL.
button pressed (to lower the sensitivity one step below that used for
production inspection). Any unit which is rejected at the lower sensi-
tivity shall be classed as a defective.
4.4.5 Phosphate coating. -The method of test shall be as Prescribed by
TT-C-490 for the type of coating used (see Dwg. D7258812). The prescribed
panels shall be processed, with the projectiles to be represented, at the
start of daily production and at 4-hour intervals, maximum, thereafter.
Appearance and weight of the coating shall be recorded.
4.4.6 Paint adhesion. -The method of test shall be as prescribed by
TT-C-490. The test shall be made on the painted bourrelet of each unit
of the sample forward of the rotating band. Visible exposure of under-
lying phosphate coating or ferrous metal of any unit of the sample as a
result of the test, shall be recorded as a defect.
4.4.7 Corrosion resistance. -The method of test shall be as prescribed in
American Society for Testing and Materials (ASTM), ASTM B117. The paint
shall not be disturbed, however, the rotating band and unpainted surfaces
of the sample projectiles may be masked out by a wax coating or other
suitable material. The salt spray solution and exposure time shall be as
specified in 3.5.3.
4.4.8 Metal parts security. -The method of test will be as prescribed by
AMCR 715-505, Volume 8, as applicable. The test sample will be assembled
to comply with requirements of Dwg. D7259191, Cartridge, 20mm, for M55A2
TP, and M55A2B1, TP, projectile metal parts test. The test cartridges,
at ambient temperature, will be fired in an M39 gun in bursts Of 50 shots.
The gun barrel will be at ambient temperature for the firing of each burst.
The cyclic rate of fire will be recorded for informational purposes.
PREPARATION FOR DELIVERY
5.1 Packing, Level C. -Each lot of projectiles shall be packed as specified
by Dwg. F7258861 or Dwg. D7259136.