The Australian Transport Safety Bureau recommends that Raytheon
Aircraft Company review the potential side effects on humans of the
cocktail of HFC-134a refrigerant, in its gaseous form, and the
associated lubricant. If that review finds the use of such
materials is significantly adverse to human health, the use of
HFC-134a refrigerant and its associated lubricant as an
airconditioning refrigerant in pressurised aircraft should also be
reviewed.