QRH 7.37
Condition
Des cendres volcaniques sont suspectées lorsqu’une ou plusieurs de ces situations se produisent :
• Une décharge statique autour du pare-brise
• Une lueur brillante dans les entrées moteur
• De la fumée ou de la poussière dans le poste de pilotage
• Une odeur âcre.
Objectif
Sortir du nuage de cendres et redémarrer les moteurs si nécessaire.
CAUTION
Exit volcanic ash as quickly as possible. Consider a 180° turn. Consider a descending turn.
Don oxygen masks and smoke goggles, as needed.
Establish crew communications, as needed.
1 Autothrottle (if engaged) → Disengage If conditions allow, run the engines at idle thrust. Thrust levers (both) → Close This step reduces possible engine damage or flameout, or both, by decreasing EGT
2 ENGINE START switches (both) → FLT
3 PACK switches → HIGH
4 ENG ANTI-ICE switches (both) → ON
5 WING ANTI-ICE switch → ON Volcanic Ash
6 APU switch (if APU available) → START This step supplies backup electrical and pneumatic sources, if needed
NOTE — Volcanic ash can cause non-normal system reactions such as: • Engine malfunctions, increasing EGT, engine stall or flameout. • Decrease in indicated airspeed or loss of airspeed indications. • Equipment cooling OFF light. If failed, the engine(s) can accelerate to idle very slowly, especially at high altitudes. If N2 is steadily increasing and EGT stays within limits, the start is progressing normally. Plan to land at the nearest suitable airport.
Choisis une option
QRH officiel AILO-0902 (PDF)
Aide-mémoire formation. Le QRH papier/PDF Air Inuit fait toujours foi.