How many oxygen masks are in each PSU?

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Multiple Choice

How many oxygen masks are in each PSU?

Explanation:
Oxygen is supplied from the PSU in fixed groups that cover a block of seats. In the A320 family, each PSU is designed to serve four passenger positions, so four oxygen masks are housed in each unit. When depressurization occurs, the masks drop from that PSU to provide oxygen for the passengers seated in that block. This layout keeps the oxygen mask distribution aligned with the cabin seating arrangement without needing a separate mask for every single seat.

Oxygen is supplied from the PSU in fixed groups that cover a block of seats. In the A320 family, each PSU is designed to serve four passenger positions, so four oxygen masks are housed in each unit. When depressurization occurs, the masks drop from that PSU to provide oxygen for the passengers seated in that block. This layout keeps the oxygen mask distribution aligned with the cabin seating arrangement without needing a separate mask for every single seat.

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