7.2.13 ADF INPUT TESTS
Select ST3400 to Maintenance Page 5: ADF & HDG.
SIGNAL
FUNCTION
RESULT
PASS FAIL
Tune #1 ADF to
station and select
ADF Mode.
ADF1
Verify the #1 ADF bearing value
matches bearing to the station within
+- 4 Degrees
#1 ADF Valid
ADF1 VALID
Verify value of #1 ADF Valid
indicates “VALID”
Tune #1 ADF to
station and select
ANT Mode.
ADF1 VALID
Verify value of #1 ADF Valid
indicates, “INVALID DATA”
Tune #2 ADF to
station and select
ADF Mode.
ADF2
Verify the #2 ADF bearing value
matches bearing to the station within
+- 4 Degrees
#2 ADF Valid
ADF2 VALID
Verify value of #2 ADF Valid
indicates “VALID”
Tune #2 ADF to
station and select
ANT Mode.
ADF2 VALID
Verify value of #2 ADF Valid
indicates, “INVALID DATA”
7.2.14 HEADING INPUT TESTS
Select ST3400 to Maintenance Page 5: ADF & HDG
SIGNAL
FUNCTION
RESULT
PASS FAIL
#1 Heading System
use the free mode and
slew the heading 360
degrees.
HDG1
Verify the #1 Mag Heading value
matches the aircraft heading
displayed on HSI -4 Degrees
#1 Heading Valid pull
circuit breaker to go
invalid
HDG1 VALID Verify value of #1 Mag Heading
Valid indicates, “INVALID DATA”.
#1 Heading Valid,
reset circuit breaker.
HDG1 VALID Verify value of #1 HDG Valid
indicates, “VALID”.
#2 Heading System
use the free mode and
slew the heading 360
degrees.
HDG2
Verify the #2 Mag Heading value
matches the aircraft heading
displayed on HSI -4 Degrees
#2 Heading Valid pull
circuit breaker to go
invalid
HDG2 VALID Verify value of #2 Mag Heading
Valid indicates, “INVALID DATA”.
#2 Heading Valid,
reset circuit breaker.
HDG2 VALID Verify value of #2 HDG Valid
indicates, “VALID”.
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ST3400 INSTALLATION MANUAL
82002-IM-L
Summary of Contents for ST3400
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