Airplane General - Galleys & IFE

The forward galley is located at the No. 1 passenger door. Galley module 1A is forward of the door and module 1B is aft. The aft galley has one module which extends the full width of the passenger compartment just aft of the No. 4 passenger door.

Electric load control units (ELCU) and galley load relays (GLR) protect the galley circuits. The ELCUs and GLRs are controlled by the bus power control unit (BPCU) to reduce loads in galley buses. Loads are reduced in two stages depending on the overload. If overload persists, the galley bus is totally de-energised. All GLR's are de-energised if a single source overloads during ground operations, or if single generator operation occurs during flight. ELCU's will de-energise if overload persists. Galley Bus is reset by the UTILITY BUS switch.

The video system (located in the forward right galley closet) provides pre-recorded video programs for passenger viewing. The video programs are displayed on video monitors located in the passenger cabin. The video program audio can be heard through the passenger address system speakers and/or through the audio entertainment system at each individual seat.

The video system receives AC power from one of two sources. When the airplane is in the air, the video system receives AC power from the Right Utility Bus. When the airplane is on the ground or when either engine is being started, the video system receives AC power from the Right AC Bus. The video system receives AC power through six circuit breakers on right misc electrical equipment panel (in the forward E/E bay). The system also receives DC power from the Right DC Bus through a circuit breaker on the overhead panel. The source of DC power does not change.

Monitors:

• Video monitors are mounted in the passenger cabin ceiling above the main aisle. The forward monitor is retractable and all other monitors are fixed position. Adjustment controls on the monitors are not accessible to flight personnel. Liquid Crystal Display (LCD) video monitors are installed on the aft walls of the forward right galley and the forward left lavatory.

• Liquid Crystal Display (LCD) video monitors are installed on the aft walls of the forward right galley and the forward left lavatory. Retractable LCD monitors are also mounted in the PSUs. The monitors extend to show the video program and retract when the program ends. The monitors also retract if it's prevented from full extension or if pushed or hit while extended.

The passenger entertainment system supplies entertainment audio to the passenger seats. The system gets power from the Right Utility Bus through circuit breakers on the right miscellaneous electrical equipment panel (under the flight deck). The power relays get power from the Battery Bus through a circuit breaker on the overhead circuit breaker panel.

Entertainment Control Switch

The system is controlled by an entertainment control switch (also referred to as the PES switch) on the forward attendant panel.

Audio Entertainment Player

The Audio Entertainment Player (AEP) is installed in the forward E/E bay and contains four identical CD player decks. They play CD-I discs only, and play them in an endless manner. If an ordinary compact disc is loaded, it will be stopped as soon as it is found unreadable.

The AEP reproduces 16 channels of audio, 4 channels from each CD player deck. Decks 1, 2, and 4 supply 12 channels for passenger seat audio. Deck 3 supplies 4 channels for boarding music which can be set on the forward attendant panel.

When a PA PTT is initiated, the AEP enters pause mode. In this mode, the discs are rotating, but the audio reproduction is stopped. Releasing the PA PTT will put the AEP back into play mode with audio reproduction restarted from where it was interrupted.