Packing requirements, packing instructions and UN packagings
Domain 5 - Packing. This domain tests selection of the right packing instruction, correct use of UN specification packagings, and the quantity limits that apply.
Core rules
- The packing instruction for the row, the aircraft type and the packing group is mandatory; it dictates inner and outer packaging types, whether UN specification packagings are required, and the maximum net quantity per package.
- Packagings must be closed so that no leakage occurs in flight from pressure and temperature change; liquids need cushioning, absorbent material and upright orientation; inner packagings must be packed so they cannot break or shift.
- UN packaging codes: 1 drum, 3 jerrican, 4 box, 5 bag, 6 composite; material letters include A steel, B aluminium, G fibreboard, H plastic.
- The certification mark, for example 4G/Y145/S/24/CN/XY123, means fibreboard box, tested for packing groups II and III, 145 kg gross mass, suitable for solids or inner packagings, made in 2024, China, maker code.
Worked example
A PG II corrosive is offered in a fibreboard box marked 4G/Z150/S/23/CN/AB456. Reject it. The letter Z means the packaging was tested only for packing group III, so it may not be used for a PG II substance; the correct packaging must carry X or Y. The letter S also shows the packaging is qualified for solids or inner packagings, so loose liquid in it is wrong regardless of packing group.
Traps that cost marks
- Comparing the gross mass of the package with the net quantity limit in the instruction.
- Assuming an X-marked packaging is acceptable for everything, including a different packaging type than the instruction specifies.
- Reusing a damaged or reconditioned packaging without checking the mark and condition.
- Overlooking that some instructions require inner packagings to be packed in absorbent material sufficient to absorb the entire liquid content.