L-1011 General Aircraft Characteristics: Forward Elec Service Center (FESC) Access Hatch (25-14)

The FESC is accessible in flight through this hatch which opens up and aft. It is hinged to the rear to prevent Cabin Attendants from accidentally stepping into the access. Once the hatch is opened, access to the compartment is by means of a ladder, built into the wall.

L-1011 General Aircraft Characteristics: Service Compartments (25-13)

There are four physically separate service centers. The Forward Electronics Service Center (FESC), under the cockpit floor, is the location of the main avionics bay. Ahead of the Forward Cargo Compartment is the Environmental Control Center (ECS). Behind the Forward Cargo is the Mid Electrical Service Center (MESC), and further back, near the main wheels, is the Hydraulics Service Center.

The ECS and Hydraulics Service Center are unpressurized.

Only the FESC and MESC - the electrical centers - are accessible in flight.