MIL-PRF-1/1647E
TABLE I. Group A inspection - Continued.
11/ With qualifying activity approval the manufacturer may provide, in accordance with MIL-PRF-1, service-life
guarantee, in lieu of performing life testing. Life test endpoints specified shall apply to service-life guarantee
conformance as well as to life test conformance. The number of hours of system-deployed, accumulated tube-
operating time shall be approved by the qualifying activity and shall be a minimum of 500 hours. Service-life
guarantee shall define tube operating life and not time from purchase or delivery. Tubes sold under service-life
guarantee shall be marked with contract number and with the number of tube operating hours guaranteed. The
qualifying activity may restore life testing requirements when service performance or tube reliability indicate it is
justified.
12/ This pulse amplitude test of conformance inspection, part 2 shall be performed in accordance with the same test
frequency and following application of shock testing, whenever shock testing is performed.
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