49 CFR 172 Special Provisions – A-Codes
These provisions apply only to transportation by aircraft.
| Code | Description | |
|---|---|---|
| A1 | Single packagings are not permitted on passenger aircraft. | Browse A1 |
| A2 | Single packagings are not permitted on aircraft. | Browse A2 |
| A3 | For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with absorbent material in tightly closed metal receptacles before packing in outer packagings. | Browse A3 |
| A4 | Liquids having an inhalation toxicity of Packing Group I are not permitted on aircraft. | Browse A4 |
| A5 | Solids having an inhalation toxicity of Packing Group I are not permitted on passenger aircraft and may not exceed a maximum net quantity per package of 15 kg (33 pounds) on cargo aircraft. | Browse A5 |
| A6 | For combination packagings, if plastic inner packagings are used, they must be packed in tightly closed metal receptacles before packing in outer packagings. | Browse A6 |
| A7 | Steel packagings must be corrosion-resistant or have protection against corrosion. | Browse A7 |
| A8 | For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with cushioning material in tightly closed metal receptacles before packing in outer packagings. | Browse A8 |
| A9 | For combination packagings, if plastic bags are used, they must be packed in tightly closed metal receptacles before packing in outer packagings. | Browse A9 |
| A10 | When aluminum or aluminum alloy construction materials are used, they must be resistant to corrosion. | Browse A10 |
| A11 | For combination packagings, when metal inner packagings are permitted, only specification cylinders constructed of metals which are compatible with the hazardous material may be used. | Browse A11 |
| A13 | Bulk packagings are not authorized for transportation by aircraft. | Browse A13 |
| A14 | This material is not authorized to be transported as a limited quantity or consumer commodity in accordance with §173.306 of this subchapter when transported aboard an aircraft. | Browse A14 |
| A19 | Combination packagings consisting of outer fiber drums or plywood drums, with inner plastic packagings, are not authorized for transportation by aircraft. | Browse A19 |
| A20 | Plastic bags as inner receptacles of combination packagings are not authorized for transportation by aircraft. | Browse A20 |
| A29 | Combination packagings consisting of outer expanded plastic boxes with inner plastic bags are not authorized for transportation by aircraft. | Browse A29 |
| A30 | Ammonium permanganate is not authorized for transportation on aircraft. | Browse A30 |
| A34 | Aerosols containing a corrosive liquid in Packing Group II charged with a gas are not permitted for transportation by aircraft. | Browse A34 |
| A35 | This includes any material which is not covered by any of the other classes but which has an anesthetic, narcotic, noxious or other similar properties such that, in the event of spillage or leakage on an aircraft, extreme annoyance or discomfort could be caused to crew members so as to prevent the correct performance of assigned duties. | Browse A35 |
| A37 | This entry applies only to a material meeting the definition in §171.8 of this subchapter for self-defense spray. | Browse A37 |
| A51 | Irrespective of the quantity limitations specified in Column (9A) of the §172.101 Table or §175.75(c), the following aircraft batteries may be transported on passenger aircraft as cargo:
| Browse A51 |
| A53 | Refrigerating machines and refrigerating machine components are not subject to the requirements of this subchapter when containing less than 12 kg (26.4 pounds) of a non-flammable gas or when containing 12 L (3 gallons) or less of ammonia solution (UN2672) (see §173.307 of this subchapter). | Browse A53 |
| A54 | Irrespective of the quantity limits in Column 9B of the §172.101 table, a lithium battery, including a lithium battery packed with, or contained in, equipment that otherwise meets the applicable requirements of §173.185, may have a mass exceeding 35 kg if approved by the Associate Administrator prior to shipment. | Browse A54 |
| A55 | Prototype lithium batteries and cells that are packed with not more than 24 cells or 12 batteries per packaging that have not completed the test requirements in Sub-section 38.3 of the UN Manual of Tests and Criteria (incorporated by reference; see §171.7 of this subchapter) may be transported by cargo aircraft if approved by the Associate Administrator and provided the following requirements are met:
| Browse A55 |
| A56 | Radioactive material with a subsidiary hazard of Division 4.2, Packing Group I, must be transported in Type B packages when offered for transportation by aircraft. Radioactive material with a subsidiary hazard of Division 2.1 is forbidden from transport on passenger aircraft. | Browse A56 |