Honeywell International Inc. 9PGTPL-100A Manuale Utente

Page 1004

1 Mar 2006

TPL-100A Processor / Part No. 940-0530-001

Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.

The second method is used if other traffic displays are unable to show the failure because 
of a display malfunction or some other reason. To start the second method, push the TEST 
button located on the front panel of the MILACAS-FR Processor and read the fault codes 
shown on the front panel LED indicator.

Before doing a Mode S/TCAS system self test, make sure the following aircraft systems 
are powered and operate with no failure flags on the cockpit instruments:

•

Air data systems

•

Radio altimeter systems

•

Altitude (vertical gyro) systems

•

Heading (compass) systems.

NOTE: If the attitude and heading data supplied to the system is from an attitude 

heading reference system (AHRS), inertial reference system (IRS) or inertial 
navigation system (INS). Make sure they are aligned and in an operational 
mode.

NOTE: If a PPI radar/TCAS display is used as the traffic display and has a TCAS mode on 

the selector switch, it must be turned to the TCAS position for the test.  If not, the 
selector switch should be turned to the OFF position to allow the traffic display 
enable discrete (from the MILACAS-FR processor) to turn the display on.  It needs 
about 5 seconds after the test is started for the display to warm up.

(1) In dual Mode S-equipped aircraft, set the transponder selector on the transponder 

control unit to position 1 to test the No. 1 transponder.

(a) Rotate the function selector counterclockwise to the TEST position and hold the 

switch in this position for at least one second. 

(b) Thereafter, the self-test continues automatically for approximately 12 seconds.

(2) If there are no malfunctions, the test sequence is as follows:

(a) A test pattern appears on the display to verify each type of intruder symbol.  See 

Figure 1001.

(b) For aircraft equipped with RA/VSI:

1

During the first few seconds of the test, the RA/VSI red and green 
circumference lamps (climb/descend indicators) illuminate sequentially.  The 
TCAS flag is in view throughout the test period.