Introduction Abbreviations Dimensions Panels Lighting Emergency Lighting Doors & Windows Oxygen System Passenger Cabin Signs Flight Deck Door CDSS Emergency Evacuation Potable Water Lavatories EICAS Messages

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

OFF : The FASTEN SEAT BELTS signs illuminate if:

Cabin Altitude above 10,000 ft or
As Installed: 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
Passenger Oxygen ON or
Flaps not UP

OFF : The NO SMOKING signs illuminate if:

Cabin Altitude above 10,000 ft or
As Installed: Passenger Oxygen ON

RETURN TO SEAT

RETURN TO SEAT signs are illuminated with the FASTEN SEAT BELTS signs, except when:

As Installed: Cabin Altitude above 10,000 ft
As Installed: 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, regardless of selector position.

Note: Anytime Passenger Oxygen is deployed, the RETURN TO SEATS extinguish if the cabin altitude is above 10000 ft, regardless of selector position.

Note: Anytime Passenger Oxygen is deployed, the RETURN TO SEATS extinguish if the cabin altitude is above 10000 ft and passenger oxygen is on, regardless of selector position.

When the passenger signs illuminate or extinguish, a low tone sounds over the PA system.

Flight Deck Door