DOT-SP 12726 No More?
On March 27, 2026 the Council on Safe Transportation of Hazardous Articles (COSTHA) submitted a Petition for Rulemaking to incorporate DOT- SP 12726 into the Hazardous Materials Regulations. As a member of COSTHA, Tym’s is thankful for this organization’s efforts and support this proposed rulemaking.
Currently, with 18 grantees, DOT-SP 12726 is a commonly used Special Permit allowing aircraft owners, operators, distributors, and repair stations to ship aircraft fire extinguishers (i.e. “fire bottles”) as UN1044 Fire Extinguishers, even when they don’t otherwise qualify.
Are you affected?
Any company that handles aircraft fire bottles should utilize Special Permit DOT-SP 12726. Hundreds, perhaps thousands, of companies are potentially out of compliance based on the complex shipping requirements and design of these aviation articles.
Benefits of DOT-SP 12726
This Special Permit has been a substantial benefit to the aviation industry because very few aircraft fire bottle meet the design requirements of a “Fire Extinguisher” in accordance with 49CFR 173.309. This section of the Hazardous Materials Regulations must be met when classifying an aircraft fire bottle as Fire Extinguishers under UN 1044 for shipping. In most cases, it is impossible to properly classify as UN1044 without utilizing DOT-SP 12726. Unfortunately, DOT-SP 12726 also requires a Party Status application. Most Hazmat Employers are not familiar with this process and it adds additional regulatory scrutiny to the organization.
Other benefits of DOT-SP 12726 are the inclusion of explosive cartridges, or squibs (not “squids” ◡̈ ), installed on aircraft fire bottles. However, in recent years, this has become less important since manufacturing Special Permits such as DOT-SP 7945 have been updated to allow cartridges to remain installed. In any case, merely simplifying shipping processes utilizing DOT-SP 12726 greatly reduces complexity for shippers and dramatically reduces regulatory burden and complexity.
This regulatory oversight was solved in 2018 during a regulatory review by DOT PHMSA, so the agency is very aware of this rule. While the proposed rulemaking process is underway ensure that you remain compliant. Tym’s can assist with your Party Status application for DOT-SP 12726.
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