COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
Model FA5000
Rev. 03 Page 221
Feb. 27/13
FDR Function Testing & Fault Isolation
23–70−40
Use or disclosure of information on this sheet is subject to
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
The document reference is online, please check the correspondence between the online documentation and the printed version.
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