COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 221
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70
−
40
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the restrictions on the cover page of this document.
Table 204. Aircraft Interface Troubleshooting Chart (Continued)
Pin
ID
Signal Type
Signal Function
Failure Mode
Local Effect
End Effect
42
Differential
ARINC717
(+)
FDR Data Output
ARINC 717 High
The signal path is
open
Disrupted FDR Data
Output (ARINC 717
High) echoed back to
FDAU
Disrupted FDR Data
Output (ARINC 717
High) echoed back to
FDAU
42
Differential
ARINC717
(+)
FDR Data Output
ARINC 717 High
The signal path is
shorted
Disrupted FDR Data
Output (ARINC 717
High) echoed back to
FDAU
Disrupted FDR Data
Output (ARINC 717
High) echoed back to
FDAU
43
Power Rtn
28VDC Return Sec
ondary; Connect to
DC Power Supply
Ground
The signal path is
open
Loss of DC Power
Loss of CVDR function
ality
43
Power Rtn
28VDC Return Sec
ondary; Connect to
DC Power Supply
Ground
The signal path is
shorted
No Effect
No Effect
44
Power
28VDC Input Sec
ondary
The signal path is
open
Loss of Pos 28 VDC
Loss of CVDR function
ality
44
Power
28VDC Input Sec
ondary
The signal path is
shorted
Loss of Pos 28 VDC
Loss of CVDR function
ality
45
Power Rtn
Res Area Microphone
Power Return
The signal path is
open
Loss of Area Micro
phone Power Return
Fails to record no au
dio is recorded
45
Power Rtn
Res Area Microphone
Power Return
The signal path is
shorted
Area Microphone
Power Return is de
graded due to interfer
ence
Degraded EMI
46
Ground
Res Area Microphone
Power Shield Ground
The signal path is
open
No Effect
No Effect
46
Ground
Res Area Microphone
Power Shield Ground
The signal path is
shorted
No Effect
No Effect
47
Discrete I/P
Push To Test
The signal path is
open
Unable to initiate test
ing cannot detect fault
Unable to perform test
no indication of fault
47
Discrete I/P
Push To Test
The signal path is
shorted
Testing runs only once
with a continuous fault
indication
Fault light is always on
48
Discrete I/P
6dB CAM Input At
tenuation
The signal path is
open
No Effect
No Effect
48
Discrete I/P
6dB CAM Input At
tenuation
The signal path is
shorted
6dB CAM Input Atten
uation signal software
receives continuous 6
dB attenuation
6dB CAM Input Atten
uation signal software
receives continuous 6
dB attenuation
49
Discrete I/P
12dB CAM Input At
tenuation
The signal path is
open
No Effect
No Effect
49
Discrete I/P
12dB CAM Input At
tenuation
The signal path is
shorted
12dB CAM Input At
tenuation signal soft
ware receives continu
ous 12 dB attenuation
12dB CAM Input At
tenuation signal soft
ware receives continu
ous 12 dB attenuation
Rev.04 Page 221
Mar. 21/14
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