QRH 3.5 · Étape 8
8 When ice crystal icing conditions are no longer present :
Use engine anti-ice normally.
The autothrottle can be re-engaged, if needed.
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Additional Information
One or more of the following can indicate ice crystal icing:
• Light to moderate turbulence
• Static discharge around the windshield (St. Elmo’s fire)
• Smell of sulfur
• Smell of ozone
• Humidity increase
An erroneous TAT indication can occur as a result of ice crystals blocking the sensor. The erroneous indication can last from one minute to more than 20 minutes. TAT normally should increase approximately 2 degrees Celsius per 1000 ft of descent.
Vibration indication due to fan hub icing can be 4 units or greater. Fan ice removal procedures have no effect on fan hub icing. When clear of clouds, fan hub ice evaporates and engine vibration decreases over time. Fan hub ice can remain into descent.
QRH officiel AILO-0902 (PDF)
Aide-mémoire formation. Le QRH papier/PDF Air Inuit fait toujours foi.