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Page Title:
Appendix A First Article - Initial Production Testing Requirements and Inspection Methods for Cannon, 155MM: M199 |
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|  MIL-C-45975B(AR)
APPENDIX A
FIRST ARTICLE - INITIAL PRODUCTION TESTING REQUREMENTS
AND INSPECTION METHODS FOR CANNON, 155MM: M199
10. SCOPE
10.1 Scope. This Appendix details all requirements and inspection methonds
necessary for First Article - Initial Production Testing (FA-IPT). This Appendix
A is a mandatory part of the specification. The information contained herein is
intended for compliance.
20. APPLICABLE DOCUMENTS. This section is not applicable to this Appendix A.
30. REQUIREMENTS
30.1 FA-IPT testing. FA-IPT tests shall be conducted on cannon or critical
assemblies or parts thereof when:
a. A new contractor is utilized.
b. A time lapse of one year has occurred since the item was last produced
by the contractor.
c.
Significant changes have been made in a manufacturing process or
material.
d. A design change is made.
If the cannon or critical assemblies or parts thereof fail FA-IPT testing,
then failure analysis shall be invoked (see 40.4),
30.2 Performance. The requirements for performance are contained in 3.5.1
3.5.2, and 3.5.3 of MIL-C-45975.
30.3 Climatic. The cannon will be employed in all types of areas, terrain and
climates in which the supported units may operate. This includes operation in
geographical areas which include temperature extremes from +125F to -50F.
30.4 Thermal warning device. The thermal warning device asembly fastened to
the top of the breech ring, shall indicate the approximate temperature of the tube
powder" chamber and warn the user of a potentially dangerous overheated tube
condition. The indicator shall rotate freely and smoothly about its pivot over a
range of OF to 500F when the sensing bulb is subjected to temperature changes.
Within three minutes after firing 12 zone 8 M203 rounds at four rounds per minute
followed by eight rounds of the same type at two rounds per minute, the
temperature registered on the device shall increase at least 75F above its
initial reading.
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