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25.1455-1 - Waste Water/Potable Water Drain System Certification Testing

Date Issued
March 11, 1985
Responsible Office
ANM-112,  Northwest Mountain Region - Transport Airplane Directorate
Sets forth a specific method of compliance with the requirements of section 25.1455 of the FAR pertaining to draining of fluids through drain masts when the fluids are subject to freezing. This method is designed to verify that draining fluids will not accumulate as ice in sufficient quantity to be hazardous. Is for guidance purposes and to set forth one method of compliance that has been found acceptable.