(1)
The test is controlled by the STATUS/HISTORY switch on the GPWC. The results are depicted on an 8-character BITE display also located on the face of the GPWC. The STATUS test is initiated if you momentarily select PRESENT STATUS with the STATUS/HISTORY switch. The HISTORY test is initiated if you momentarily select FLIGHT HISTORY with the STATUS/HISTORY switch. The STATUS test will depict the status of the latest flight information. The HISTORY test will depict the information related to the last ten flights. Both tests commence with ALL SEGMENTS TEST and terminate with END TEST messages. The computer faults are indicated by the message GPWC FAILED or FLT HIST INVALID. All other fault messages indicate an incorrect input condition.
(2)
The desired information is read from memory and converted to alphanumeric data for presentation on the BITE display. Messages are presented by means of this vocabulary:
R 1EFF : 001-049, 051-060, 101-104, 1 34-48-00Page 41 1 1 Config-2 May 01/05 1 1 1CES 1
Status/History Test Readouts
Figure 014
R 1EFF : 001-049, 051-060, 101-104, 1 34-48-00Page 42 1 1 Config-2 May 01/05 1 1 1CES 1
IN TEST INVALID LAMPTEST
END TEST INACTIVE AUDIO
GPWS OK INHIBIT SELECT
GPWC PREVIOUS FLIGHT-0
RADIO TEN FLIGHT-1
ALTIMETR FLIGHTS FLIGHT-2
BARORATE OK FLIGHT-3
AIRSPEED FAILED FLIGHT-4
ALTITUDE AIR DATA FLIGHT-5
GLIDE ILS DATA FLIGHT-6
SLOPE IRS DATA FLIGHT-7
CANCEL EXTERNAL FLIGHT-8
COURSE FLT HIST FLIGHT-9
GEAR INPUT CORRECTD
RUNWAY PROCESSR LOCALIZR
HEADING OUTPUT LATITUDE
FLAPS ASSEMBLY LONGITUD
(3) Examples of the STATUS test vocabulary are:
GPWS OF GEAR INVALID GPWC FAILED
R 1EFF : 001-049, 051-060, 101-104, 1 34-48-00Page 43 1 1 Config-2 May 01/05 1 1 1CES 1
(4) Examples of the HISTORY test vocabulary are:
RADIO BARORATE ILS DATA
ALTIMETR INVALID INACTIVE
INACTIVE FLIGHT-2 FLIGHT-3
FLIGHT-1 FLIGHT-4
FLAPS PREVIOUS
INVALID TEN
FLIGHT-8 FLIGHTS
- OK
(5)
No aural warnings are broadcast during either test.
(6)
If the history test message you read is too long, you can stop the test. To do this, you must set the STATUS/HISTORY switch to PRESENT STATUS until the BITE display is blank. The display will then show CANCEL followed by END TEST. This operation will have no adverse effect on the data held in the flight history memory.
(7)
The sequences of the flight history test and those of the present status test will not activate the cockpit voice outputs.
E. CFDS Interface
(1) BITE description The BITE facilitates maintenance on in-service aircraft. It detects and identifies faults related to the GPWS. The BITE of the GPWC is connected to the CFDIU. The BITE:
-transmits permanently GPWS status and its identification message to the CFDIU
-memorizes the faults which occurred during the last 63 flight segments
-monitors data inputs from the various peripherals (FMGC, RA transceiver, ILS receiver, ADIRU, SFCC, LGCIU, ECAM control panel and CFDIU)
-transmits to the CFDIU the result of the tests performed
-can communicate with the CFDIU through the menus. The BITE can operate in two modes:
-
the normal mode
-
the menu mode.
(a) Normal mode During the normal mode, the BITE monitors cyclically the status of the GPWS. It transmits its information to the CFDIU during the concerned flight.
R 1EFF : 001-049, 051-060, 101-104, 1 34-48-00Page 44 1 1 Config-2 May 01/05 1 1 1CES 1
In case of fault detection, the BITE stores the information in
the fault memories.
These items of information are transmitted to the CFDIU every 100
ms by an ARINC 429 message with label 356.
(b) Menu mode The menu mode can only be activated on the ground. This mode enables communication between the CFDIU and the GPWC BITE by means of the MCDU. The GPWS menu mode is composed of:
-LAST LEG REPORT
-PREVIOUS LEGS REPORT
-LRU IDENTIFICATION
-GROUND SCANNING
-TROUBLE SHOOTING DATA
-CLASS 3 FAULTS
-TEST
-GROUND REPORT.
(Ref. Fig. 015, 016, 017)
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