Aircraft Communication Systems
Over-the-air Communication
Aircraft Interphone System
Terrestrial communication
SATCOM
SELCAL
VHF COM
HF COM
Pilot Boomset
Audio Control Panel
Line Replacable Unit
VHF COM Antenna
Top and bottom of fuselage
EE-bay
BITE can be activated by CMC or Front panel test switch
Standby communication Link
voice communication over oceans and in remote area
2MHz to 29.999Mhz
longer distance communication capability
2 set of HFCOM
antenna on leading edge of vertical stabiliser
HF COM COUPLERS
transmit interlock for HF couplers
BITE test both transceiver and coupler
Resolves overhearing over VHF or HF links
Rides on VHF OR HF channels 312.6Hz to 1479.1Hz
DATA COMMUNICATION SYSTEM
Aircraft Communication Addressing and Reporting System (ACARS)
Uses VHF Data Link (VDL) as well as SATCOM and HF Data Link (HFDL)
Includes automatic and manual initiation of messages
Each message limited to 220 characters
Digital Data Link for data transfer
3 TYPES OF MESSAGES
Air Traffic Control (ATC)
Aeronautical Operation Control (AOC)
Airline Administrative Control (AAC)
Messages compliant to ARINC 618 Standard
Aircraft Interphone Systems
Cabin Interphone System (Passenger Addressing System)
Flight Interphone System
Service Interphone System
Cabin Crew - Pilot Calls
Cabin Crew - Cabin Crew Calls
Within aircraft cabin comm, including PA
Allows simultaneous calls or conference calls
PRORITY
Priority systems controlled by the Interphone System Switching/Controller Unit
Cabin Interphone System Priority
-Emergency Calls
-Call from Flight Deck
-Call from Attendant Station to all stations (including Flight Deck)
-Call from Attendant Station to another Attendant Station
Passenger Addressing System
-Connect with Cabin Interphone System to make announcements
-PA priority
-Flight deck Announcement
-Attendant Announcement
-Pre-recorded Announcement Messages(PRAM)
-Video Announcement (VA) (optional)
-Boarding music
Higher priority freezes or pauses lower priority announcement
from/within cockpit (except to cabin stations)
Types of calls:
-Pilot > Pilot Calls
-Pilot > Ground Service Calls
Communication from service & maintenance areas
Types of calls:
Ground Service - Pilot calls
Ground Service - Ground Service calls
Ground Service - Cabin Crew calls
Information Recording Systems
Flight Data Recorder (FDR)
Stores key aircraft performance parameters and system data
High survivability with Underwater Locating Device (ULD)
Stores 88 required parameter groups in the last 25 hours of operation