Chapter 4 - Preventative Measures and Deicing Procedures

Occupational Safety and Health (OSH)

112.  Pilots must be aware of the potential health effects of deicing and anti-icing fluids. Proper precautions must be taken during the deicing and anti-icing process to ensure the well being of passengers and flight crew. Passengers and crew should be shielded from all FPD fluid vapours by turning off all cabin air intakes during the deicing and anti-icing process. Exposure to vapours or aerosols of any FPD fluid may cause transitory irritation to the eyes. Exposure to ethylene glycol vapours in a poorly ventilated area may cause nose and throat irritations, headaches, nausea, vomiting, and dizziness.

113.  All glycols cause some irritation upon contact with the eyes or the skin, although the irritation is described as "negligible", chemical manufacturers recommend avoiding skin contact with FPD fluids and wearing protective clothing when performing normal deicing and anti-icing operations.

114.  Ethylene and diethylene glycol are moderately toxic for humans. Swallowing small amounts of ethylene or diethylene glycol may cause abdominal discomfort, pain and dizziness, and can affect the central nervous system and kidneys. Because the glycol contained in FPD fluids is considerably diluted with water and other additives, it is unlikely that deicing personnel could ingest a lethal amount accidentally in the normal performance of their duties. Detailed information on health effects and proper safety precautions for any commercial FPD fluid is contained in the material safety data sheet for that fluid. This sheet is available from the fluid manufacturer and should be on file with the operator providing the deicing or anti-icing service.