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Communication & Information Systems (Satellite-based Systems SATCOM…
Communication & Information Systems
Data Communication System
Aircraft Communication Addressing and Reporting System (ACARS)
Digital datalink for data transfer
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
3 types of messages
Air Traffic Control (ATC)
Aeronautical Operation Control (ADC)
Airline Administrative Control (AAC)
Messages compliant to ARINC 618 Standard
Terrestrial Communication Systems
VHF COM
It is the primary communication link
Provides omnidirectional communication
air-to-ground voice communication
Uses 118MHz to 136.975MHz
antennas are on top and bottom of fuselage
VHF COM transceivers are in the EE-bay
BITE can be activated by CMC or front panel test switch
HF COM
"standby" communication link
provides voice communication over oceans and in remote areas
uses 2MHz to 29.99MHz
its characteristics allow longer distance communication capability
antennas are on the edge of vertical stabiliser
HF COM transceivers are in the EE-bay
BITE test both transceiver and coupler
Aircraft Interphone Systems
Cabin Interphone Systems
Includes passenger addressing system
Connect with Cabin Interphone System to make
announcements
Priority
Flight Deck Announcement
Attendant Announcement
Pre-recorded Announcement Messages (PRAM)
Video Announcement (VA)
Boarding Music (BM)
Higher priority announcements “freeze” lower priority
announcements/entertainment programs
Types of calls
Cabin Crew – Pilot calls
Cabin Crew – Cabin crew calls
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
Flight Interphone Systems
Facilitates communications
originated from/within
cockpit (except to cabin
stations)
Types of calls
Pilot – Pilot calls
Pilot – Ground Service
calls
Service Interphone Systems
Provides communication from
service & maintenance areas
Types of calls
Ground Service – Pilot
calls
Ground Service – Ground
Service calls
Ground Service – Cabin
Crew calls
Satellite-based Systems SATCOM
BITE test activated via CMC
or front-panel switch
All other SATCOM
component systems typically
mounted in ceiling of cabin
areas
SATCOM antennas on top of
fuselage
Uses 1616 MHz to 1626.5 MHz
(L Band, Iridium system) for aircraft
link and 4 GHz to 6 GHz (C band)
for ground link
Provides voice and data communication over oceanic airspace
"Backup" Communication System
Information Management System
Flight Data Acquisition and Management System FDAMS
Provides two key functions
Aircraft Condition Monitoring
Flight Data Aquisition
• Collects and sends data to Flight
Data Recorder (FDR)
Monitors aircraft systems or
sensors and informs airliner of
anomalies
Capable of post-flight review
Information Recording System
Flight Data Recorder
Stores key aircraft performance
parameters and system data
Aids maintenance analysis as well
as incident/accident investigation
High survivability and equipped
with Underwater Locating Device
(ULD)
Stores 88 required parameter
groups in the last 25 hours of
operation
Cockpit Voice Recorder
Must be physically separated with
FDR
Stores the audio communications
in the cockpit
Information typically used for air
incident/accident investigation
Stores a last 2 hours of
conversations or audio information
during operation