What does PSU stand for in airline terminology?

• A. Passenger Service Unit
• B. Pilot-in-Command/ Captain
• C. Passenger Index Number
• D. Quick Reference

Answer: (A)

In airline terminology, PSU stands for Passenger Service Unit—the panel above each passenger’s seat that groups together controls and amenities like the reading light, air vent, and the call button, and also houses the oxygen mask stowage. This is the standard cabin term crews and manuals use, so it’s the best match for the acronym. The other options refer to roles or items not connected to the cabin unit itself: a pilot-in-command or captain describes the flight crew, while passenger index number and quick reference aren’t recognized cabin components. In practice, you’ll often notice the oxygen masks stored in the PSU, designed to deploy during depressurization, underscoring why this particular meaning is correct.