Avionics Systems Day 6
Transponder Used to help ATC identify aircraft  operating in controlled airspace Transponders operate in the same  frequ...
The control head of an ATC transponder
Transponder When ATC radar interrogates the  aircraft, the transponder automatically  responds by sending a four digit  i...
Transponder The four digit code is registered in the  ATC computer along with the aircraft  flight plan      The control...
Transponder Functions Identification (ident) – simply the four  digit coded reply Altitude reporting – transponder is  c...
Transponder Operation Transponders operate in three modes Mode A     Identification only Mode C     Identification & ...
TCAS Traffic alerting & Collision Avoidance  System     Used with mode S transponders     Works independently of ground...
ELT Emergency Locator Transmitter Battery powered transmitter required on  all general aviation aircraft Produces a loc...
ELT Inertia switch activated      6 G forward      Also has a manual switch on the ELT, &       usually in the cockpit...
ELT 100 Mile range at 10,000 ft 48 Hour capacity Installed in the tail of the aircraft      Provides protection from c...
ELT Must be tested on a regular basis     Every 12 calendar months The test must be performed within the  first 5 minut...
ELT Testing Tune radio to 121.5 With the ELT disconnected from the  antenna turn on the ELT using the switch     You sh...
ELT Battery Check Battery must be replaced at the time of  the expiration date found on the battery  case Or if more tha...
EPIRB Emergency & Position Indicating Radio  Beacon New replacement for the ELT Will be required by Feb. 2009 5 Watts ...
EPIRB Picked up by satellites Can be interfaced with aircraft GPS     Pinpoint accuracy .031 kilometers     Old ELT 12...
FDR Flight Data Recorder Device which monitors & records specific  flight operation parameters for analysis  after an ac...
FDR Required on all commercial airliners  since 1958 Records the last 25 hours of flight Located in the aircraft tail ...
FDR Parameters     Altitude & Airspeed     Attitude & Direction     Vertical acceleration     Landing gear position  ...
CVR Cockpit Voice Recorder     Records the last 30 minutes of the flight      deck voice communications     Microphone ...
Intercom System Cabin interphone system Amplified audio signals allow  communication between members of the  flight crew...
Intercom System Service Interphone System     Allows communication between flight crew      & ground personnel or mechan...
The End!(for today)
Day 6
Day 6
Day 6
Day 6
Day 6
Day 6
Day 6
Day 6
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Day 6

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Day 6

  1. 1. Avionics Systems Day 6
  2. 2. Transponder Used to help ATC identify aircraft operating in controlled airspace Transponders operate in the same frequency range as ATC radar Required to be inspected & tested every 24 calendar months
  3. 3. The control head of an ATC transponder
  4. 4. Transponder When ATC radar interrogates the aircraft, the transponder automatically responds by sending a four digit identification code
  5. 5. Transponder The four digit code is registered in the ATC computer along with the aircraft flight plan  The controller will see the aircraft registration number and four digit code on the radar screen
  6. 6. Transponder Functions Identification (ident) – simply the four digit coded reply Altitude reporting – transponder is coupled to an encoding altimeter which sends the aircraft altitude with the reply Collision avoidance – monitors other aircraft transponders in the area & will determine if a collision is possible
  7. 7. Transponder Operation Transponders operate in three modes Mode A  Identification only Mode C  Identification & Altitude reporting (required in some airspace) Mode S  Identification, Altitude reporting, & collision avoidance
  8. 8. TCAS Traffic alerting & Collision Avoidance System  Used with mode S transponders  Works independently of ground stations  If a collision course is detected the system will display appropriate directions to the pilot to prevent the collision
  9. 9. ELT Emergency Locator Transmitter Battery powered transmitter required on all general aviation aircraft Produces a locator signal which can be used by search & rescue to locate downed aircraft
  10. 10. ELT Inertia switch activated  6 G forward  Also has a manual switch on the ELT, & usually in the cockpit Frequencies  121.5 & 243 MHz  International distress frequencies
  11. 11. ELT 100 Mile range at 10,000 ft 48 Hour capacity Installed in the tail of the aircraft  Provides protection from crash damage when placed as far aft as possible
  12. 12. ELT Must be tested on a regular basis  Every 12 calendar months The test must be performed within the first 5 minutes of any hour  Log book entry should be made after test
  13. 13. ELT Testing Tune radio to 121.5 With the ELT disconnected from the antenna turn on the ELT using the switch  You should hear the siren Turn switch to arm position & shake  You should hear the siren again Turn off ELT using the switch  Do not let the ELT operate for more than 3 seconds at a time
  14. 14. ELT Battery Check Battery must be replaced at the time of the expiration date found on the battery case Or if more than one hour has been depleted from the battery  Check maintenance records in the aircraft logbooks
  15. 15. EPIRB Emergency & Position Indicating Radio Beacon New replacement for the ELT Will be required by Feb. 2009 5 Watts of power not ½ watt Digital signal  Identifies owner and aircraft  Fewer false alarms  Must be registered with the FAA
  16. 16. EPIRB Picked up by satellites Can be interfaced with aircraft GPS  Pinpoint accuracy .031 kilometers  Old ELT 1260 sq kilometers More rapid response time for rescuers
  17. 17. FDR Flight Data Recorder Device which monitors & records specific flight operation parameters for analysis after an accident  The “BLACK BOX”  Which is actually bright orange
  18. 18. FDR Required on all commercial airliners since 1958 Records the last 25 hours of flight Located in the aircraft tail Fire & “G” resistant Transmits a locator signal so it can be found in the wreckage
  19. 19. FDR Parameters  Altitude & Airspeed  Attitude & Direction  Vertical acceleration  Landing gear position  Flight control position  Engine power  Greenwich mean time “ZULU time”
  20. 20. CVR Cockpit Voice Recorder  Records the last 30 minutes of the flight deck voice communications  Microphone in the cockpit  Recorder in the tail  Crush & fire resistant  Transmits a locator signal so it can be found
  21. 21. Intercom System Cabin interphone system Amplified audio signals allow communication between members of the flight crew or with the passengers Public address system
  22. 22. Intercom System Service Interphone System  Allows communication between flight crew & ground personnel or mechanics
  23. 23. The End!(for today)

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