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|  MIL-S-85419 (AS)
figures 13 and 14 for starter performance and shall produce 6KW
power output for APU performance.
4.5.21.6 Dielectric Strengh. The starter/APU electrical system
shall be subjected to a test procedure to verify conformance with
paragraph 3.6.24.4.
4.5.21.7 Burn-in. Each component which includes any electronic
part, shall be subjected to this test. Temperature sensors shall
be installed in the first component of each manufacturer's part
number in the locations which are the last to stabilize in
temperature as a result of following a temperature change, and
subjected to a cycle of temperature as described below, starting
with step b. The times required for steps c and a shall be
recorded. Each component shall then be tested as follows: The
component shall be placed in the temperature chamber, operated in
normal (rated) conditions, and subjected to vibration in
accordance with 4.5.6 procedure throughout the test. The
component shall be subjected to cycles of temperature as follows
until it has achieved three consecutive failure-free cycles:
a. The temperature of the chamber shall be reduced to and
maintained at -67 +4F until the temperature at all locations in
the component are below -49F (the capacity of the chamber shall
be such that this shall not require more than one hour).
b. The temperature of the chamber shall be reduced to and
maintained at -67F for four hours,
c. The temperature of the chamber shall be increased to and
maintained at 158 +4F until the temperature at all locations in
the component are above 140F (the capacity of the chamber shall
be such that this shall not require more than one hour).
d. The temperature of the chamber shall be maintained at 158
+4F for a minimum of four hours,
The time for steps a and c shall be the same in testing
subsequent components as that which was found necessary for the
first component. Whenever there is any change in the
manufacturer's part number for this component, or in the
temperature chamber, temperature sensors shall be installed in
the first component as described above and it shall be tested as
described above to determine the time needed for steps a and c.
PACKAGING
5.
5.1 Application. The requirements specified herein apply only
to direct purchases by or direct shipments to the Government.
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