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Atlas/ ELOS Findings/ ST19358IB-T-B-03

FAA · Equivalent Level of Safety Finding

Equivalent Level of Safety (ELOS) Finding for Vibration/buffeting compliance criteria for large external antenna installation

ST19358IB-T-B-03 Current Issued 07/31/2025 PDF ↗

What is an ELOS finding?

An Equivalent Level of Safety finding allows a project to deviate from a specific 14 CFR requirement when the alternative is shown to provide equivalent safety. Project-specific — not a precedent for other applicants.

14 CFR sections deviation applies to

  • § 25.251
  • § 21.21