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Troubleshooting
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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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For AOG assistance contact:

CRC Montreal (YUL)
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oxygen lo qty
passenger oxy on
oxygen lo qty arrow btn

Oxygen pressure has fallen to a low level below 1,400 psi (75%), an oxygen bottle pressure switch is indicating < 45 psi (bottle discharge), a failed pressure switch, a shut-off valve has been left closed following maintenance action.

passenger oxy on arrow btn

Oxygen is supplied to passenger masks manually, or when cabin altitude reaches 14,500 +500/-700 ft.

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