After arrival at the gate, which aural signal and visual signal indicate it's okay to open the MCD?

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Multiple Choice

After arrival at the gate, which aural signal and visual signal indicate it's okay to open the MCD?

Explanation:
The signal to open the MCD is a single high-pitched chime paired with the seat belt sign being turned off. The one high chime acts as a go-ahead cue to the cabin crew that it’s safe to begin deplaning activities, while the seat belt sign off confirms that passengers may unbuckle and move about. If the seat belt sign is still on or if another chime pattern is heard, it indicates the cabin is not yet ready for door operation. So the combination of one high chime and the seat belt sign being off is the indication to proceed with opening the MCD.

The signal to open the MCD is a single high-pitched chime paired with the seat belt sign being turned off. The one high chime acts as a go-ahead cue to the cabin crew that it’s safe to begin deplaning activities, while the seat belt sign off confirms that passengers may unbuckle and move about. If the seat belt sign is still on or if another chime pattern is heard, it indicates the cabin is not yet ready for door operation. So the combination of one high chime and the seat belt sign being off is the indication to proceed with opening the MCD.

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