Under Contract NAS9-12973 and its Supplemental Agreements, David Clark Co. Inc. (DCC) supplied to NASA, principally for the Skylab Missions, the following items:n(a) Communications Carrier Assemblies (CCA) DCC P/N 16536G-07n(b) Filter Bypass Adapter Assemblies (FBAA), PCC P/N 12535G-01n(c) Sub-assemblies, parts and repairs as needednThe Communications Carrier Assembly is essentially a skull cap containing soft molded earcups which supports and holds the microphone and earphone modules in the proper location. It is similar to that supplied under NASA Contract 9-7976 for the Apollo missions.
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