MIL-PRF-39010E, PERFORMANCE SPECIFICATION COIL, RADIO FREQUENCY, FIXED, MOLDED, ESTABLISHED RELIABILITY AND NONESTABLISHED RELIABILITY, GENERAL SPECIFICATION FOR (27 AUG 1997) [SUPERSEDING MIL-C-39010D]., This specification covers the general requirements for established reliability (ER) and nonestablished reliability (non-ER) fixed, radio frequency, molded coils. Established reliability radio frequency coils covered by this specification have failure rate levels (FRL) ranging from 1.0 percent per 1,000 hours to 0.001 percent per 1,000 hours which are established at a 60 percent confidence level (see 1.2.1.4). The FRL identified by the applicable symbol specified in table III refers to operation at full load cyclic condition at the specified ambient temperature (see 3.1).