(What PSN must be used for shipment of air conditioner compressor?)
Q.
Our client is shipping Air Conditioner Compressor containing flammable
UN 3252 Refrigerant Gas R32. Air conditioner compressors are regarded
as refrigerating machine so it falls under UN 3358 Refrigerating machines
which are forbidden for air transport. However, per SP A103, refrigerating
machines and refrigerating machine components are considered not subject
to the Regulation if containing less than 100 g of flammable, non-toxic,
liquefied gas.

Gases not contained in the compressor but shipped as raw material in an
ordinary cylinder will be classified as UN 3252 Refrigerant Gas R32.
PI 200 must be used and can be shipped on CAO.
Are my understandings correct? (31 Mar 18)
A.
Yes, your interpretations are correct. If shipping UN 3252 Refrigerant Gas R32 Div. 2.1 as raw material packed in an ordinary cylinder, PI 200 applies, and can be shipped on CAO aircraft. If the R32 Gas is installed in the air conditioner compressor, the unit must be shipped as UN 3358 Refrigerating machine however forbidden for air transport unless the quantity of gas is less than 100 g satisfying SP A103.

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