Boeing 737-300 Series, Maintenance Manual, Page: 24 / 35

GENERAL AEROSPACE
Boeing 737-300
MAINTENANCE MANUAL
EFFECTIVITY
PW245
34-53-00GA
DRAWING # GA-BC17-ATC-MM
Page 508
Use and disclosure shall be in accordance with the proprietary legend located on the cover of this document AUG 15/10
Do the steps that follow:
(a)
Set the mode switch on the ATC Control Panel to the XPDR position.
(b) Set the altitude source switch on the ATC Control Panel to the 1 position.
(4) Push the INTERROGATE switch.
(a)
Make sure the test set shows the correct transponder type.
NOTE : If the test set shows "NO REPLY FROM XPDR", do a check on the test antenna
connections. Also, make sure the ATC system is operational.
(5) Push the INTERROGATE switch to run a complete test.
(a)
Make sure the test set does these tests:
1)
ATCRBS/A & SLS
2) ATCRBS/C
3) ATCRBS/A Mode S All
4) ATCRBS/C Mode S All
5) ATCRBS/A only
6) ATCRBS/C only
7) Mode S Surv Identity
8) Mode S Surv Altitude
9) Mode S Surv Short
10) Mode S Comm Identity
11) Mode S Comm Altitude
12) Mode S Comm Short
NOTE : The Mode-S Comm will be tested by the T-49 tester if the transponder is equipped
with the capability. If not, the T-49 skips over these steps.
13) Undesired Replies
14) Squitter
15) Diversity
NOTE: This test is only available to test set with the TAP 125 option.
16) POWER, RCVR & FREQ
(6) The test set display shows the test results when the test is completed.
(a)
Make sure the test set shows the same ATC ID code set on the ATC Control Panel.
NOTE: If the identification switch on the ATC Control Panel is pushed during the test, the ID
code will have an underscore.
(b) Make sure the Mode S address is correct (WDM 34-53-12).
(c) Make sure the reported altitude agrees with the local field elevation shown on the captain's or first
officer's altimeter.
NOTE : Make sure the reported altitude is within
±
125 feet of the local field elevation altitude
shown on captain's and first officer's altimeter (applicable for all the altitude reporting
check).
(d) Make sure the output power is not less than 70W (ERP = 48.5 dBm) and not more than 500W
(ERP = 57.0 dBm).