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|  MIL-T-82571A(OS)
4.4.5.22.3 Control valve operating lever. During all dry firing tests
observe that there is no leakage or premature air escape while the control
valve is in the safe condition.
4.4.5.22.4 Ready light circuit operation. During the dry firing tests,
verify that the ready light circuit condition is in accordance with Schedule
I when the control valve operating lever is in the READY condition. Measure-
ments should be made across terminals 7 and 8 of TB104 for Barrel No. 1 and
across terminals 3 and 4 of TB105 for Barrel No. 2.
4.4.5.22.5 Breakaway plug mechanism. After each dry firing, the break-
away plug mechanism shall be in the latched position and shall be capable
of being unlatched by hand.
4.4.5.22.6 Electrical firing test. Each barrel electrically fired shall
fire with only one 400 millisecond application of test potential. TWO firings
shall be made at 102.5 plus or minus 0.5 volts ac and two firings at 123.5
plus or minus 0.5 volts ac.
*
SCHEDULE I - DRY FIRING TESTS
NOTE: Each barrel is to be fired five times
as outlined below.
**Indicates firing is to be attmpted electrically prior to manual firing.
This is to check pressure switch control of firing circuit. The barrel
cannot be fired electrically unless the ready light is on.
Ensure that the applicable barrel is secured at proper attitude to be com-
patible with track.
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