VHF Communication Panel
HF Communication Panel
Audio Selector Panel (ASP)
Miscellaneous Communication Controls (Typical)
Interphone and Passenger Address Controls
Cockpit Voice Recorder
Call System
Selective Calling Panel (SELCAL)
20 System Description
Introduction
Audio Systems and Audio Selector Panels
Speakers and Headsets
Microphones
Normal Audio System Operation
Degraded Audio System Operation (airplanes with ALT-NORM switch)
Flight Interphone System
Service (Attendant) Interphone System
Passenger Address System
Call System
Selective Calling (SELCAL)
VHF Communications
HF Communications
Cockpit Voice Recorder
6-Electrical

Electrical Panel
AC and DC Metering Panel
Generator Drive and Standby Power Panel
Bus Switching
Ground Service Switch
20 System Description
Introduction
Electrical Power Generation
Engine Generators
APU Generator
External Ground Power
Ground Service
Electrical Power Schematic
AC Power System
Bus Transfer System
Automatic Galley Load Shedding
APU Automatic Galley Load Shedding
AC Power Schematic
Electrical Power Controls and Monitoring
Generator Drive
AC Voltmeter and Frequency Meter
DC Voltmeter and Ammeter
Electrical Power Controls and Monitoring Schematic
DC Power System
Transformer Rectifier Units
Battery Power
Battery Charger
DC Power Receptacle
DC Power System Schematic
Standby Power System
Normal Operation
Alternate Operation
Static Inverter
Standby Power System Schematic
All Generators Inoperative
Airplane General, Emergency Equipment, Doors and Windows
Air Systems
Engines, APU
Communications
Electrical
Flight Instruments
Fire Protection
Fuel
Hydraulics
Landing Gear
Navigation
Warnings
Basic Equipment Operating – Instrument Panels
Captain Instrument Panel
First Officer Instrument Panel