Table of Contents TP 10643
- How to Use This Manual
- Record of Revisions
- Foreword
- Chapter 1 - Air Law, The Clean Aircraft Concept
- Chapter 2 - Theory and Aircraft Performance
- Chapter 3 - Deicing/Anti-icing Fluids
- Chapter 4 - Preventative Measures and Deicing Procedures
- Chapter 5 - Ground Crew Supplement
- Chapter 6 - Aircraft Critical Surface Contamination Examination Questions
- List of Tables
- Acronyms
- Glossary
De-icing the Engine Area
87. Minimal amounts of FPD fluid should be used to de-ice the engine area and auxiliary power unit (APU). FPD fluids ingested in the APU can cause an auto shutdown, overspeed or rotors burst (which can lead to a fire) as well as, smoke and vapours to enter the cabin. Engine intake areas should be inspected for the presence of ice immediately after shutdown. Accumulations should be removed while the engine is cooling and before installation of plugs and covers. Any accumulation of water must be removed to prevent the compressor from freezing.
88. For turbo-jet engines, FPD fluids should not be used for de-icing internal components. Fluid residue on the engine fan or compressor blades can reduce engine performance or cause stall or surge. In addition, this could increase the possibility of glycol vapours entering the aircraft through the engine bleed air system.
89. Most turbo-jet and turbo-prop engine manufacturers recommend that thrust levers be advanced periodically to an N1 rpm of 70 to 80% while the aircraft is in ground operations to prevent ice accumulation that can result in reduced thrust, dynamic imbalance of the fan or compressor or excessive induction of shed ice. Pilots are made aware of these operating procedures in training. All procedures should comply with the procedures established by the manufacturer.