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Atlas/TSOA

FAA · TSO Authorizations

TSOA.

Technical Standard Order Authorizations — equipment-level certifications. Each authorizes a manufacturer to produce a part meeting a specific TSO standard. 7,574 indexed.

Most-issued TSO standards

  • TSO-C148 193 holders
  • TSO-C47 103 holders
  • TSO-C127a 102 holders
  • TSO-C113 94 holders
  • TSO-C39A 90 holders
  • TSO-C39c 78 holders
  • TSO-C4C 68 holders
  • TSO-C106 65 holders
  • TSO-C39B 65 holders
  • TSO-C39 64 holders
  • TSO-C39b 59 holders
  • TSO-C43 55 holders
  • TSO-C55 54 holders
  • TSO-C23B 53 holders
  • TSO-C49A 52 holders
  • TSO-C72B 51 holders
  • TSO-C6C 50 holders
  • TSO-C22F 48 holders
  • TSO-C90C 48 holders
  • TSO-C4c 47 holders
  • TSO-C10B 47 holders
  • TSO-C87 46 holders
  • TSO-C34e 43 holders
  • TSO-C36e 42 holders
  • TSO-C52A 41 holders
  • TSO-C72C 41 holders
  • TSO-C127 41 holders
  • TSO-C49b 39 holders
  • TSO-C9C 39 holders
  • TSO-C90A 38 holders

Recent issuances