PTP SYS TEST AND SYS STATUS

GENERAL
The following sequence deals with the Programming and Test Panel (PTP) SYSTEM STATUS and SYSTEM TEST functions. After pressing the DiSPLay ON pushbutton, the
first page gives access to 3 main parts:
– SYSTEM STATUS to get information on the Cabin Intercommunication Data System (CIDS) and on all connected cabin systems,
– SYSTEM TEST to test CIDS as well as all connected cabin systems,
– PROGRAMMING to change the zoning, (not explained in this module).

SYSTEM STATUS
The SYSTEM STATUS function lets the current status of the CIDS be monitored. This includes the CIDS and the interfaces to other systems. In case of no failure, the message is “OK” E.g.: “CIDS OK”. In case of failure, the message is indicated first. E.g.: “SLIDE PRESS LOW”. Selecting the membrane switch next to the failure message gives more details on the related failure. For maintenance/cabin crew support, the following systems functions are also monitored:
– lavatory smoke system (detectors and lavatory fire extinguisher pressure),
– slide bottle pressure,
– doors bottle pressure,
– drain masts,
– doors closed/slides armed status.
NOTE: If an optional system/function is not requested by the customer, it will not be monitored or shown on the display.
MAINTENANCE
The MAINTENANCE page gives access to the same items as the Centralized Fault Display System (CFDS) SYSTEM REPORT/TEST concerning the CIDS:
– last leg report,
– previous legs report,
– Line Replaceable Unit (LRU) identification,
– fault data,
– class 3 faults,
– ground scan.
In flight, only the “CURRENT LEG REPORT” item is displayed and available.

LAST LEG REPORT
This display shows the LAST/CURRENT LEG REPORT, with thedate and time of the failure occurrence, the ATA chapter and the name of the failed unit. It contains class 1+2 failures.
PREVIOUS LEGS REPORT
This display shows the previous legs. It contains class 1+2 failures. The various failed units can be:
– director (DIR) 1,
– DIR 2,
– Decoder/Encoder Unit (DEU) A,
– DEU B,
– CIDS top bus,
– CIDS middle bus,
– PTP,
– Forward Attendant Panel (FAP),
– System Data Acquisition Concentrator (SDAC) 1+2,
– Centralized Fault Display Interface Unit (CFDIU),
– Emergency Power Supply Units (EPSUs),
– Smoke Detector Control Unit (SDCU) channel 1+2,
– Cabin Assignment Module (CAM).
NOTE: The PREV LEG report contains the fault information of the last 64 flight legs and includes the date, time and ATA chapter.
LRU IDENTIFICATION
The Part Number of the relevant unit is shown.

FAULT DATA
This display contains the same DATA as “TROUBLE SHOOTING DATA” when using the MCDU with the CFDS. It shows:
– the date,
– the leg number,
– the hour,
– the number of occurrences,
– a 6 digits code which gives a more precise failure identification.
For example, code 240A07 means DEU A 200RH07 discrete output or wiring connection pin J2-2.
NOTE: Failures are marked with “LEG 03”.
CLASS 3 FAULTS
This display shows class 3 fault messages from the following items:
– CFDIU,
– SDCU channel 1,
– SDCU channel 2,
– SDAC 1,
– sign lamp,
– call lamp,
– Attendant Indication Panel (AIP),
– Additional Attendant Panel (AAP),
– reading light,
– reading light Printed Circuit Board (PCB),
– power reading light PCB,
– work light FWD, MIDdle, AFT,
– work light PCB FWD, MID,
– power PCB FWD, MID, AFT,
– Passenger Entertainment System (PES) Main Multiplexer (MMUX),
– announcement reproducer,
– video system.
GROUND SCAN
The GROUND SCAN indicates all class 1 and 2 failures which are present on ground. For the continuously monitored systems, the ground memory will be updated when the failure has been cancelled. For non-monitored systems, the update will occur after a DIR power-on or after a test activation via the PTP or MCDU.

SYSTEM TEST
The SYSTEM TEST function is used for the test on ground only of the following units: :
– active DIR,
– CIDS bus,
– DEU A,
– DEU B,
– CAM,
– PTP,
– FAP,
– AAPs,
– AIPs,
– loudspeakers,
– sign lamps,
– Area Call Panels (ACPs),
– passenger call lamps,
– reading/work lights,
– emergency light battery,
– drain masts.
NOTE: Test of the passive director (DIR) 2 is only available via the MCDU. (ACT) indicates that director 1 is active.
The RESET function initiates a CIDS power on reset including the complete power on test. The complete power on test is only done if there is at least one cabin door open. If there is a failure, it can be read using the automatically displayed SYSTEM STATUS/MAINTENANCE mode on the PTP.

READING/WORK LIGHTS TEST
See ATA 33 for more explanations about EMERGENCY LIGHT BATTERY test.
NOTE: The reading/work lights test also includes the test of the decoration lights, if the system is installed.

Credit : Sourav Singh 
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