If combustible fluid is used for propeller deicing, the certificate holder must comply with § 125.153.
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14 CFR · PART 125
§ 125.123 Propeller deicing fluid.
Official text · Current as of Oct 19, 2026 · from eCFR
Not legal advice. This is the official text as published in the eCFR, which is updated daily but is not the legal edition. For legal purposes, use the annual Code of Federal Regulations or ask an aviation attorney.