S 865-005

 (6)  
Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 TASK 34-45-00-735-006
 3.  System Test - TCAS (With the IFR TCAS-201 Test Set)
__________________
 A.  General
 (1)  This test is a complete system check of the TCAS. The system test first runs the TCAS Operational Test, and then does a check of the TCAS using ground test equipment.
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A
747-400
MAINTENANCE MANUAL

 (2) The IFR TCAS 201 ramp test set is use to examine the TCAS system.
 B. Equipment
 (1)  
TCAS Ramp Test Set - IFR Model TCAS-201
 Instruments and Flight Research, Inc.
 10200 West York St.
 Wichita, KA 67215
 or equivalent.

 (2)  
Radio Altimeter test set

 (3)  
Pitot/Static test set - Castleberry AT700-5D (or equivalent)

 C. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 31-61-00/501, Integrated Display System (IDS)

 (3)  
AMM 32-09-02/201, Air/Ground Relay System

 (4)  
AMM 34-21-00/501, Inertial Reference System (IRS)

 (5)  
AMM 34-33-00/501, Radio Altimeter System

 (6)  
AMM 34-53-00/501, Air Traffic Control (ATC)

 (7)  
AMM 45-10-00/201, Central Maintenance Computer System (CMCS)

 D. Prepare for the System Test
 S 865-007
 (1)  
Supply Electrical power (AMM 24-22-00/201).

 S 215-008

 (2)  
Make sure this circuit breaker is closed:

 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A5, TCAS

 S 215-011
 (3)  
Make sure these systems are serviceable:

 (a)  
Integrated Display System (AMM 31-61-00/501)

 (b)  
Air Data Computing System (AMM 34-12-00/501)

 (c)  
Inertial Reference System (AMM 34-21-00/501)

 (d)  
Radio Altimeter System (AMM 34-33-00/501)

 (e)  
Air Traffic Control (AMM 34-53-00/501)

 (f)  
Flight Management Computer System (AMM 34-61-00/501)

 (g)  
Central Maintenance Computer System (AMM 45-10-00/201)

 (4)  
Do the TCAS Operational Test.

 S 715-012
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A
747-400 MAINTENANCE MANUAL
 S 865-013
 CAUTION: DO NOT OPERATE THE TEST SET WHEN TEST SET ANTENNA IS WITHIN 15
_______ INCHES OF AIRPLANE ANTENNA. DAMAGE TO THE TEST SET MAY OCCUR.
 (5)  Set up TCAS-201 tester antenna in an appropriate location (50 feet from the bottom TCAS antenna) forward of the airplane at 45 degrees off of the center line to send signals to the TCAS directional antenna.
 NOTE: Make sure there is no obstruction between the TCAS antenna
____ and test set antenna. Face the test set antenna in the direction so that the TCAS antenna under test receives the strongest signal. Use the antenna stand to prevent movements to the test set antenna which can cause TCAS to loose tracking. If ground equipment, walkways or other objects that could cause a signal obstruction or a multipath problem, choose a more suitable location for the test set and change the setup in the test set accordingly.
 S 945-287
 (6)  
Push the POWER switch to supply power to the TCAS-201 tester.

 S 865-191

 (7)  
Push the SET/CONT key on the TCAS-201 test set.

 (8)  
Enter 50 feet in the HORIZ field and 6 feet in the VERT field.

 (9)  
Enter the gain of the test set antenna in the GAIN field.

 S 865-192
 S 865-193
 NOTE: The antenna gain should be listed on the test set antenna.
　
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