Airplane General - Passenger Cabin Signs
The passenger cabin signs are controlled by overhead panel selectors. The passenger signs illuminate when the following conditions are satisfied:
FASTEN SEAT BELTS
AUTO - The FASTEN SEAT BELTS signs illuminate if:
- Landing Gear not up and locked, or
- Flap Lever not UP, or
- Cabin Altitude above 10,000 ft or
- Passenger Oxygen ON
NO SMOKING
AUTO - The NO SMOKING signs illuminate if:
- Landing Gear not up and locked or
- Cabin Altitude above 10,000 ft or
- Passenger Oxygen ON
All passenger signs can be controlled manually by positioning the respective selector to ON or OFF.
Note: Anytime Passenger Oxygen is deployed, the NO SMOKING and FASTEN SEAT BELTS illuminate and RETURN TO SEAT signs extinguish, regardless of selector position.
RETURN TO SEAT signs are illuminated with the FASTEN SEAT BELTS signs, except when Oxygen is deployed.
When the passenger signs illuminate or extinguish, a low tone sounds over the PA system.
