DOC AIRBUS | AMM A320FFOMAX (FLIGHT OPERATIONS AND MAINTENANCE EXCHANGER) - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The FOMAX is a secure server router. It connects the Electronic Flight Bag (EFB) devices to the aircraft over a secure Internet Protocol (IP) router
The FOMAX also gives:
** ON A/C NOT FOR ALL The FOMAX is a secure server router. It connects the Electronic Flight Bag (EFB) devices to the aircraft over a secure Internet Protocol (IP) router
The FOMAX also gives:
- A Wi-Fi connection from the EFBs to the aircraft parameters and to the board/ground communication channel
- An acquisition function to decode and keep the ARINC 717 Digital Aircraft Condition Monitoring System (ACMS) Recorder (DAR) frames and then send them to the ground through the FOMAX communication channel.
2. Component Location
** ON A/C NOT FOR ALL 
FOMAX - Component Location| FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 64TAMD1 | CD-FOMAX CORE SOFTWARE | 211 | 46-16-00 | ||
| 64TAMD2 | CD-FOMAX CONFIGURATION DATA SOFTWARE | 211 | 46-16-00 | ||
| 64TAMD3 | CD-A/L FOMAX CUSTOMIZATION DATA SOFTWARE | 211 | 46-16-00 | ||
| 64TAMD4 | CD-AIRBUS FOMAX CUSTOMIZATION DATA SOFTWARE | 211 | 46-16-00 | ||
| ** ON A/C NOT FOR ALL | |||||
| 64TA | FOMAX | 81 VU | 121 | 46-16-00 | |
| 64TASW1 | SOFTWARE-FOMAX CORE | 81 VU | 121 | 46-16-00 | |
| 64TASW2 | SOFTWARE-FOMAX CONFIGURATION DATA | 81 VU | 121 | 46-16-00 | |
| 64TASW3 | SOFTWARE-A/L FOMAX CUSTOMIZATION DATA | 81 VU | 121 | 46-16-00 | |
| 64TASW4 | SOFTWARE-AIRBUS FOMAX CUSTOMIZATION DATA | 81 VU | 121 | 46-16-00 | |
| 65TA | ANTENNA-WIFI, FOMAX | 550 VU | 212 | 46-26-17 | |
| 72TA | ANTENNA-GATELINK, AIRBUS FOMAX | 234 | 46-26-15 | ||
| 73TA | ANTENNA-GATELINK, A/L FOMAX | 234 | 46-26-16 | ||
3. System Description
(1) Onboard system interfaces:
- The FOMAX has interfaces with the onboard units that follow:
------------------------------------------------------------------------------- | FROM/TO | FOMAX INPUT | FOMAX OUTPUT | ------------------------------------------------------------------------------- ! Aircraft ! Alternating Current ! Discrete ! ! ! (AC) power supply ! ! ------------------------------------------------------------------------------- ! Mobile device ! Wi-Fi ! Wi-Fi ! ! (transmitting PEDs) ! Cellular ! Cellular ! ------------------------------------------------------------------------------- ! Antennas ! Coaxial cables ! Coaxial cables ! ------------------------------------------------------------------------------- ! Air Traffic Service Unit ! ARINC 429/ARINC 619 ! ARINC 429/ ! ! (ATSU) (if installed) ! ! ARINC 619 ! ------------------------------------------------------------------------------- ! Flight Management ! ARINC 429 ! ! ! and Guidance Computer ! ! ! ! (FMGC) ! ! ! ------------------------------------------------------------------------------- ! Flight Warning Computer ! ARINC 429 ! ! ! (FWC) ! ! ! ------------------------------------------------------------------------------- ! System Data Acquisition ! ARINC 429 ! ! ! Concentrator (SDAC) ! ! ! ------------------------------------------------------------------------------- ! Display Management ! ARINC 429 ! ! ! Computer (DMC) ! ! ! ------------------------------------------------------------------------------- ! Air Data/Inertial ! ARINC 429 ! ! ! Reference Unit (ADIRU) ! ! ! ------------------------------------------------------------------------------- ! Centralized Fault Display ! ARINC 429 ! ARINC 429 ! ! Interface Unit (CFDIU) ! (no data exchange !(no data exchange ! ! ! in Step 1) ! in Step 1) ! ------------------------------------------------------------------------------- ! Flight Data Interface ! ARINC 717 for DAR ! ! ! and Management Unit ! TFTP for QAR/SAR/REP ! ! ! (FDIMU) ! (If PCMCIA card installed) ! ! ------------------------------------------------------------------------------- ! Cabin Router ! Ethernet link ! Ethernet link ! ------------------------------------------------------------------------------- ! Portable Multipurpose ! Wi-Fi ! Wi-Fi ! ! Access Terminal (PMAT) ! ! ! ------------------------------------------------------------------------------- ! Portable Data Loader ! Ethernet link ! ! ! (PDL) ! ! ! ------------------------------------------------------------------------------- - Cellular frequencies and power levels that follow:
------------------------------------------------------------------------------- |Cellul-| Cellular | Uplink | Downlink | Conducted | |lar | Modem | Frequency | Frequency | Transmit | |Modem | Band | | | Power | ------------------------------------------------------------------------------- ! !LTE Band 1 !1920 - 1980 MHz ! 2110 - 2170 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 2 !1850 - 1910 MHz ! 1930 - 1990 MHz !+23 dBm +/- 1 dB! ! !--------------------------------------------------------------------- ! !LTE Band 3 !1710 - 1785 MHz ! 1805 - 1880 MHz !+23 dBm +/- 1 dB! ! !--------------------------------------------------------------------- ! !LTE Band 4 !1710 - 1755 MHz ! 2110 - 2155 MHz !+23 dBm +/- 1 dB! ! !--------------------------------------------------------------------- ! !LTE Band 5 !824 - 849 MHz ! 869 - 894 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 7 !2500 - 2570 MHz ! 2620 - 2690 MHz !+22 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 8 !880 - 915 MHz ! 925 - 960 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 9 !1749.9 - 1784.9 MHz!1844.9 - 1879.9 MHz!+23 dBm +/- 1 dB! ! !--------------------------------------------------------------------- ! !LTE Band 12 !669 - 716 MHz ! 729 - 746 MHz !+23 dBm +/- 1 dB! ! !--------------------------------------------------------------------- ! !LTE Band 13 !777 - 787 MHz ! 746 - 756 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! EM7565!LTE Band 18 !815 - 830 MHz ! 860 - 875 MH !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 19 !830 - 845 MHz ! 875 - 890 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 20 !832 - 862 MHz ! 791 - 821 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 26 !814 - 849 MHz ! 859 - 894 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 28 !703 - 748 MHz ! 758 - 803 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 29 ! Not Applicable ! 717 - 728 MHz ! Not Applicable ! ! ! ! (N/A) ! ! (N/A) ! ! !---------------------------------------------------------------------- ! !LTE Band 30 ! Not Applicable ! 2350 - 2360 MHz ! Not Applicable ! ! ! ! (N/A) ! ! (N/A) ! ! !---------------------------------------------------------------------- ! !LTE Band 32 ! Not Applicable ! 1452 - 1496 MHz ! Not Applicable ! ! ! ! (N/A) ! ! (N/A) ! ! !---------------------------------------------------------------------- ! !LTE Band 41 ! 2496 - 2690 MHz (TDD) !+22 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 42*! 3400 - 3600 MHz (TDD) !+22 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 43*! 3600 - 3800 MHz (TDD) !+22 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 48*! 3550 - 3700 MHz (TDD) !+22 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !LTE Band 66 ! 1710 - 1780 MHz ! 2110 - 2200 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 1! 1920 - 1980 MHz ! 2110 - 2170 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 2! 1850 - 1910 MHz ! 1930 - 1990 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 4! 1710 - 1755 MHz ! 2110- 2155 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 5! 824 - 849 MHz ! 869 - 894 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 6! 830 - 840 MHz ! 875 - 885 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 8! 880 - 915 MHz ! 925 - 960 MHz !+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 9!1749.9 - 1784.9 MHz!1844.9 - 1879.9 MHz!+23 dBm +/- 1 dB! ! !---------------------------------------------------------------------- ! !WCDMA Band 19!830 - 845 MHz ! 875 - 890 MHz !+23 dBm +/- 1 dB! -------------------------------------------------------------------------------
NOTE: * At this time, the band is not operational because the supplier of the modem waits for its regulatory approval.
- Wi-Fi frequencies and power levels that follow:
------------------------------------------------------------------------------- | | Band 1 | Band 2 | Band 3 | Band 4 | Band 5 | ------------------------------------------------------------------------------- ! Frequency !2412 - 2472! 2412 - 2472 !2412 - 2472 !2422 - 2462 ! 5180 -5240 ! ! Range ! ! ! ! ! ! ! (MHz) ! ! ! ! ! ! ------------------------------------------------------------------------------- ! Type (for ! 802.11b ! 802.11g ! 802.11n ! 802.11n ! 802.11a ! ! example: ! ! ! HT-20 ! HT-40 ! ! ! 802.11 ! ! ! ! ! ! ! a/b/g/n, ! ! ! ! ! ! ! HT-20, ! ! ! ! ! ! ! HT-40, etc)! ! ! ! ! ! ------------------------------------------------------------------------------- ! Emission ! 14M0G1D ! 16M7D1D ! 18M0D1D ! 37M2D1D ! 16M5D1D ! ! Designator ! ! ! ! ! ! ------------------------------------------------------------------------------- ! Power ! 0.53 ! 0.05 ! 0.49 ! 0.60 ! 0.13 ! ! (mW/MHz) ! mW/MHz ! mW/MHz ! mW/MHz ! mW/MHz ! mW/MH ! ------------------------------------------------------------------------------- !Antenna Gain! 0 dBi ! 0 dBi ! 0 dBi ! 0 dBi ! 0 dBi ! ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- | | Band 6 | Band 7 | Band 8 | ------------------------------------------------------------------------------- !Frequency Range (MHz) ! 5180-5240 ! 5190-5230 ! 5210 ! ------------------------------------------------------------------------------- ! Type (for example: !802.11n HT-20 ! 802.11n HT-40 ! 802.11ac-8 ! ! 802.11a/b/g/n, HT-20,! ! ! ! ! HT-40, etc) ! ! ! ! ------------------------------------------------------------------------------- ! Emission Designator ! 17M7D1D ! 37M0D1D ! 76M0D1D ! ------------------------------------------------------------------------------- ! Power (mW/MHz) ! 0.02 mW/MHz ! 0.05 mW/MHz ! 0.07 mW/MHz ! ------------------------------------------------------------------------------- ! Antenna Gain ! 0 dBi ! 0 dBi ! 0 dBi ! -------------------------------------------------------------------------------
(2) Air/ground interfaces
There are three primary air/ground interfaces:
There are three primary air/ground interfaces:
(a) The air/ground wireless-communication interfaces:
For the air/ground communication, the FOMAX uses the cellular gatelink with one antenna for Airbus and one antenna for the Airline.
Cellular gatelink for Airbus is part of the basic aircraft definition but other communication devices are optional for the Airlines. For their activation, it is necessary to use the FOMAX configuration and the FOMAX Airline customization.
For the air/ground communication, the FOMAX uses the cellular gatelink with one antenna for Airbus and one antenna for the Airline.
Cellular gatelink for Airbus is part of the basic aircraft definition but other communication devices are optional for the Airlines. For their activation, it is necessary to use the FOMAX configuration and the FOMAX Airline customization.
(b) PDL:
- The PDL is the source of the data loading process. It is connected to the FOMAX with the ARINC 615-A plug.
(c) PMAT:
- The PMAT is the source of all the FOMAX maintenance/administrative tasks.
(3) Ground segments
The FOMAX is a service provider for Pilot EFB.
The FOMAX system supplies some software modules to install into the Airline ground segments that follow:
The FOMAX is a service provider for Pilot EFB.
The FOMAX system supplies some software modules to install into the Airline ground segments that follow:
- Airline FOMAX VPN end-point for secured communications between the aircraft and the Airline Ground
- Secure File Transfer Protocol (SFTP) server to retrieve data from the aircraft applications
- GODART tool which receives the security assurance requirements for suppliers, quick access recorder, DAR and ACMS reports
- Monitoring Application Programming Interface (API) to monitor aircraft connectivity and activity with the ground
- Other FOMAX tools (monitoring Human-Machine Interface (HMI) or maintenance HMI, etc.).
B. FOMAX Software Components
The FOMAX has the software components that follow:
The FOMAX has the software components that follow:
- FOMAX core software-component (64TA/SW1)
- FOMAX configuration-data software-component (64TA/SW2)
- Airline FOMAX customization-data software-component (64TA/SW3)
- Airbus FOMAX customization-data software-component (64TA/SW4).
(1) FOMAX core software-component (64TA/SW1)
The FOMAX core software-component is the operational software that makes the FOMAX operate correctly. It makes the data loading of the ARINC 665 field-loadable software-component possible. It includes the Operating System (OS) (SE-Linux), the basic services and commercial off-the-shelf software.
The FOMAX core software-component contains the definition of the zero-state. It gives the default condition of the unit until the configuration data and customization data-software components are uploaded and activated.
The FOMAX zero-state has the end-user functions that follow:
The FOMAX is in the zero-state in the conditions that follow:
The FOMAX core software-component is the operational software that makes the FOMAX operate correctly. It makes the data loading of the ARINC 665 field-loadable software-component possible. It includes the Operating System (OS) (SE-Linux), the basic services and commercial off-the-shelf software.
The FOMAX core software-component contains the definition of the zero-state. It gives the default condition of the unit until the configuration data and customization data-software components are uploaded and activated.
The FOMAX zero-state has the end-user functions that follow:
- Data loading
- Health monitoring and web API.
The FOMAX is in the zero-state in the conditions that follow:
- If the FOMAX core software-component is uploaded, and the FOMAX customization data and/or the FOMAX configuration-data software is not uploaded
- If a new FOMAX core software-component is installed
- If the applicable "zero-state" flag is activated in the uploaded customization software component.
(2) FOMAX configuration-data software-component (64TA/SW2):
- It configures the FOMAX core-software parameters to adapt the FOMAX to the Airbus aircraft configuration and to optimize the FOMAX.
- It is an Airbus-approved software component uploaded as an ARINC 665 field-loadable software-component. It gives the settings that follow:
(a) The network configuration:
- The addressing parameters and rules applicable to each interface
(b) The cabin router and ATSU interface settings
(c) The DAR frame speed-adjustment
(d) The activation/deactivation of the optional functions:
- The SATCOM and the Aircraft Communication Addressing and Reporting System (ACARS).
(3) Airline FOMAX customization-data software-component (64TA/SW3):
This software component gives the settings that follow:
- It contains FOMAX core software-parameters to adapt the FOMAX to the Airline requirements.
- It is a User Modifiable Software (UMS).
- The operator must upload it to the FOMAX without the aid of Airbus, Collins Aerospace or the other authorities.
- The Airline customization does not change the Airbus customization.
This software component gives the settings that follow:
(a) The Wi-Fi access-point Service Set Identifier (SSID) and the password
(b) The Airline Subscriber Identity Module (SIM) cards identification and the password for the cellular gatelink
(c) The routing policy:
- The communication channel priority can change with the location and the flight phase.
(d) Airline Virtual Private Network (VPN) - settings for the board/ground communication with the related certificate
(e) Virtual DAR (VDAR) recording start and stop conditions, compression and encryption settings.
(4) Airbus FOMAX customization-data software-component (64TA/SW4):
This software component gives the settings that follow:
- It contains FOMAX core software-parameters to adapt the FOMAX to the Airbus requirements.
- It is a UMS.
- The operator must upload it to the FOMAX without the aid of Airbus, Collins Aerospace or the other authorities.
- The Airbus customization does not modify the Airline customization.
This software component gives the settings that follow:
- The Wi-Fi access-point SSID and the password
- The Airbus SIM card identification and the password for the cellular gatelink
- The routing policy: the communication channel priority can change with the location and the flight phase (only cellular gatelink is managed by Airbus).
(a) The Airbus VPN-settings for the board/ground communication with the related certificate
(b) The VDAR recording start and stop conditions, compression and encryption settings.
(c) The list of parameters received on A429.
C. FOMAX Features
(1) The FOMAX has:
(a) The Avionics Parameters-acquisition function
(b) The A834 ADBP service to provide Avionics Parameters to the mobile devices
(c) The Wi-Fi access point in the cockpit
(d) The communication functions that follow:
1 Gatelink aircraft-communication
2 Connection to the SATCOM with Aircraft Communication Manager (ACM).
(e) VDAR:
1 Acquisition and transmission of the DAR-frame recording files to the ground
(f) Data security function:
1 OS hardening (SE Linux), aircraft communication tunneling and firewall.
(g) Administration function:
1 ARINC 615-A data loading for the FOMAX core, configuration data and customization data (ARINC 665 field-loadable software component) software components
2 Administration function manages the FOMAX status, hardware and software part numbers
3 FOMAX monitoring and log management.
4. Power Supply
In normal conditions, the FOMAX is supplied with 115VAC-400Hz, thus it starts and stops with the aircraft.
The FOMAX includes a reset function through a discrete input. This function is not used, but it is possible to do a reset of the FOMAX as follows:
In this condition, the reset of the FOMAX will occur only at software level. If this electronic maintenance device does not use this module, the "reset" software function does not operate.
** ON A/C NOT FOR ALL In normal conditions, the FOMAX is supplied with 115VAC-400Hz, thus it starts and stops with the aircraft.
The FOMAX includes a reset function through a discrete input. This function is not used, but it is possible to do a reset of the FOMAX as follows:
- With a circuit breaker, or
- With a software function.
In this condition, the reset of the FOMAX will occur only at software level. If this electronic maintenance device does not use this module, the "reset" software function does not operate.
5. Interface
The different interfaces of the FOMAX are:
The different interfaces of the FOMAX are:
- The external Ethernet interface
- The ARINC 615-A interface
- The LMF RJ45 plug interface
- The cockpit Wi-Fi interface
- The avionics interface
- The discrete interface
- The pin programming (PIN PROG) interface
- The gatelink interface.
A. External Ethernet Interface
The identified Ethernet data flows are:
The identified Ethernet data flows are:
(1) With the PMAT:
(a) For the administrative and maintenance tasks, these channels are necessary:
- LMF HMI
- VDAR HMI.
(2) With the SATCOM (through the aircraft communication manager):
- For A/G communications.
B. ARINC 615-A Interface
The identified A615-A data flows are:
The identified A615-A data flows are:
(1) With the PDL (PMAT 2000 or Techsat):
- For ARINC 615-A data loading.
C. Cockpit Wi-Fi Interface
The identified Wi-Fi data flows are:
The identified Wi-Fi data flows are:
(1) With the EFB:
(a) For the EFB operations:
1 The web services:
- This interface gives the EFB connected devices access to the FOMAX services with the Hypertext Transfer Protocol (HTTP).
2 The ARINC 834 bus:
- The FOMAX gives access to the ARINC 429 data, the discrete status and the platform parameters through the ARINC 834-4 ADBP protocol. The EFB components use this interface to retrieve the parameters that are necessary for the flight operation applications and to set the communication with the ground.
3 The communication channels:
- The Internet-Control Message Protocol (ICMP) and the secure Hypertext Transfer Protocol (HTTPS).
(b) For the administrative and maintenance tasks:
1 LMF HMI
2 VDAR HMI.
D. Avionics Interface
The avionics interface is necessary to give:
The avionics interface is necessary to give:
- Access to the avionics parameters
- The discrete status to the applications
- The ACARS transmission/reception to the EFB clients
- The ARINC 717 frame recording and storage to the VDAR function.
- The discrete interface
- The ARINC 429 interface
- The ARINC 717 interface.
6. Component Description
A. FOMAX
(1) FOMAX front face
The FOMAX front face has:
The FOMAX front face has:
- A protection door with a screw
- Two LED indicators behind the protection door on the front panel of the FOMAX (the green and amber LED indicators show the status of the FOMAX)
- Eight mini SIM card slots (J7-J14).
(2) FOMAX rear face
The FOMAX rear face has an ARINC 600 type-2 connector to connect it to:
The FOMAX rear face has an ARINC 600 type-2 connector to connect it to:
(a) Plug A (ARINC 600-19 configuration Q2)
(b) Plug B (ARINC 600-19 configuration Q11)
(c) Plug C (ARINC 600-19 configuration 24).
B. Cockpit Wi-Fi Antenna
The cockpit Wi-Fi antenna is a passive unit. The power supply is not necessary for this cockpit Wi-Fi antenna.
The cockpit Wi-Fi antenna is a passive unit. The power supply is not necessary for this cockpit Wi-Fi antenna.
C. Gatelink Antennas
The gatelink antennas are passive units. The power supply is not necessary for the gatelink antennas. To make sure that the performance does not decrease, one antenna is for the Airbus ground traffic and the other antenna for the Airline ground traffic.
The gatelink antennas are passive units. The power supply is not necessary for the gatelink antennas. To make sure that the performance does not decrease, one antenna is for the Airbus ground traffic and the other antenna for the Airline ground traffic.
D. LMF
(1) The LMF is the EFB application in charge of satisfactory troubleshooting Airborne FOMAX when it is in service. LMF application HMI is organized into five main display areas.
LMF maintenance software can:
LMF maintenance software can:
- Provide an overall view of the Airborne FOMAX.
- Display a detailed information view of the Airborne FOMAX and the aircraft equipment connected to it immediately (information constantly refreshed).
- Provide the list of FOMAX events that occurred during last flight logs.
- Identify a FOMAX service/function in failure quickly.
- Help to do the troubleshooting Airborne FOMAX, based on Trouble Shooting Manual tasks at the maintainer level or at the specialist level.
- Download all necessary information to do the further investigation in the back-office.
- Download data files not received by the ground.
- Back-up, restore or clean-up Network File Management Service (NFMS) partitions of Airborne FOMAX.
7. Operation/Control and Indicating
A. Nominal Mode
(1) The FOMAX starts automatically when the aircraft systems are energized. During this phase, the PIN PROG hardware configures the system automatically. This boot sequence is completed in less than 60 seconds.
(a) On the front face, the FOMAX has two LEDs that give the internal status of the FOMAX as follows:
| ----------------------------------------------------------------------------- |
| | LED | LED STATUS | FOMAX STATUS | |
| ----------------------------------------------------------------------------- |
| ! Green ! ON ! FOMAX energized ! |
| ----------------------------------------------------------------------------- |
| ! Green ! OFF ! FOMAX not energized ! |
| ----------------------------------------------------------------------------- |
| ! Amber ! Flashes ! FOMAX starting ! |
| ----------------------------------------------------------------------------- |
| ! Amber ! OFF ! FOMAX OK ! |
| ----------------------------------------------------------------------------- |
| ! Amber ! ON ! FOMAX defective ! |
| ----------------------------------------------------------------------------- |
B. Degraded Mode
(1) Cockpit alerts and pushbutton switches
There is no cockpit light or pushbutton switch in the cockpit to know the status of the FOMAX functions or to activate/deactivate them. The FOMAX reset is only possible with the aircraft circuit breaker or the LMF application.
The FOMAX API software gives access to the FOMAX application functions. With these functions, the end user can get data on the LRU functions.
There is no cockpit light or pushbutton switch in the cockpit to know the status of the FOMAX functions or to activate/deactivate them. The FOMAX reset is only possible with the aircraft circuit breaker or the LMF application.
The FOMAX API software gives access to the FOMAX application functions. With these functions, the end user can get data on the LRU functions.
C. Maintenance Mode
A check of the two front face LEDs is necessary to know the status of the FOMAX. The LMF, installed on the maintainer laptop or the tablet, lets you do the troubleshooting of the FOMAX.
The two LEDs on the front face of the FOMAX give the status of the FOMAX to the maintenance operator. The ground Local Maintenance Function (LMF) application, that is installed on the laptop or the tablet for the troubleshooting of the FOMAX, also gives the FOMAX status. This status is also available on the Multipurpose Control and Display Unit (MCDU), in the class-3 fault information.
A check of the two front face LEDs is necessary to know the status of the FOMAX. The LMF, installed on the maintainer laptop or the tablet, lets you do the troubleshooting of the FOMAX.
The two LEDs on the front face of the FOMAX give the status of the FOMAX to the maintenance operator. The ground Local Maintenance Function (LMF) application, that is installed on the laptop or the tablet for the troubleshooting of the FOMAX, also gives the FOMAX status. This status is also available on the Multipurpose Control and Display Unit (MCDU), in the class-3 fault information.
8. BITE
The BITE of the FOMAX:
The FOMAX uses two communication modes to send and receive the data to/from the CFDIU:
The BITE of the FOMAX:
- Makes an analysis of the monitoring and test results.
- Gives the related fault messages.
The FOMAX uses two communication modes to send and receive the data to/from the CFDIU:
- The normal mode
- The interactive mode.
A. Normal mode
In the normal mode, when the FOMAX is energized, the system sends all the fault messages to the CFDIU (in flight and on the ground).
In the normal mode, when the FOMAX is energized, the BITE function monitors the external inputs from the items of equipment that follow:
In the normal mode, when the FOMAX is energized, the system sends all the fault messages to the CFDIU (in flight and on the ground).
In the normal mode, when the FOMAX is energized, the BITE function monitors the external inputs from the items of equipment that follow:
- Flight Data Interface and Management Unit (FDIMU)
- Flight Management and Guidance Computer 2 (FMGC 2)
- Air Data/Inertial Reference Unit 2 (ADIRU 2) (ADR bus and IR bus)
- Flight Warning Computer 2 (FWC 2)
- System Data Acquisition Concentrator 2 (SDAC 2)
- Display Management Computer 2 (DMC 2)
- Centralized Fault Display Interface Unit (CFDIU).
B. Interactive mode
The FOMAX BITE interactive-mode gives access to an interactive dialog between an operator that uses a Multipurpose Control and Display Unit (MCDU) and the FOMAX system. It is possible to do the BITE interactive-mode test only on the ground. The interactive mode gives access to the tests, the current status reports and the troubleshooting data.
The FOMAX BITE interactive-mode gives access to an interactive dialog between an operator that uses a Multipurpose Control and Display Unit (MCDU) and the FOMAX system. It is possible to do the BITE interactive-mode test only on the ground. The interactive mode gives access to the tests, the current status reports and the troubleshooting data.