GENERAL AEROSPACE
Boeing 737-300
MAINTENANCE MANUAL
EFFECTIVITY
PW245
34-53-00GA
DRAWING # GA-BC17-ATC-MM
Page 504
Use and disclosure shall be in accordance with the proprietary legend located on the cover of this document
AUG 15/10
(12)
Do a check of the MODE S ALL CALL TEST. (Mode-S transponder Only)
(a)
Make sure the test set shows PASSED and the airplane's mode S address.
(13)
Do a check of the INVALID MODE S ADDRESS TEST. (Mode-S transponder Only)
(a)
Make sure the mode S transponder did not reply (PASSED TEST).
(14)
Do a check of the SPR ON/OFF TEST. (Mode-S transponder Only)
(a)
Make sure a reply is received when SPR is ON and no reply is received when SPR is OFF.
(15)
Do a check of the MODE S UF0 TEST. (Mode-S transponder Only)
(a)
Make sure (Downlink format) DF=0, AC=(airplane's altitude) and ADDRESS=(airplane's mode S
address) (WDM 34-53-12).
NOTE
: Make sure the reported altitude is within | 125 feet of the local field elevation altitude
shown on captain's altimeter (applicable for all altitude reporting check).
(16)
Do a check of the MODE S UF4 TEST. (Mode-S transponder Only)
(a)
Make sure DF=4, AC=(airplane's altitude) and ADDRESS=(airplane's mode address).
(17)
Do a check of the MODE S UF5 TEST . (Mode-S transponder Only)
(a)
Make sure DF=5, ID=(selected ATC ID code on the ATC Control Panel) and
ADDRESS=(airplane's mode S address).
(18)
Do a check of the MODE S UF11 TEST. (Mode-S transponder Only)
(a)
Make sure DF=11 and AA=(airplane's address).
(19)
Do a check of the MODE S UF16 TEST. (Mode-S transponder Only)
(a)
Make sure DF=16, AC=(airplane's altitude) and ADDRESS=(airplane's mode S address).
NOTE:
No reply to the UF16 test is not a failure of the ATC system.
(20)
Do a check of the MODE S UF20 TEST. (Mode-S transponder Only)
(a)
Make sure DF= 20, AC= (airplane's altitude) and ADDRESS= (airplane's mode S address).
NOTE
: No reply to the UF20 test is not a failure of the ATC system.
(21)
Do a check of the MODE S UF21 TEST. (Mode-S transponder Only)
(a)
Make sure DF= 21, ID= (selected ATC ID code on the ATC Control Panel) and ADDRESS=
(airplane's mode S address).
NOTE:
No reply to the UF21 test is not a failure of the ATC system.
(22)
Do a check of the SQUITTER TEST. (Mode-S transponder Only)
(a)
Make sure the squitter's period is between 0.8 to 1.2 seconds.
(23)
Do a check of the FREQUENCY TEST.
(a)
Make sure the reply frequency of the transponder Mode S is 1090 MHz
±
1MHz or 1090
±
3 for
ATCRBS Transponder type.
(24)
Move the test set to less than 50 feet from the top ATC antenna.
NOTE
: Make sure the top ATC antenna is not in the line of sight of the test set antenna. Follow the
test set operator's guide to reduce multi-path errors. Do the test several times with the test set
at different locations until you get valid results.
(25)
Push the SETUP key on the test set and enter the appropriate range for the top and bottom antenna.
(26)
Do a check of the DIVERSITY TEST. (Mode-S transponder Only)
(a)
Make sure the power level difference is
≥
20dB between 'on' antenna squitters and 'off' antenna
squitters.
