COMPONENT MAINTENANCE MANUAL
AVIATION PRODUCTS
Model FA5000
Rev. 02 Page 135
July 21/17
Testing & Fault Isolation
23–70−30
Use or disclosure of information on this sheet is subject to
the restrictions on the cover page of this document.
Table 103 Aircraft Interface Troubleshooting Chart (Continued)
Pin
ID
Signal Type Signal Function Failure Mode Local Effect End Effect
37 Differential
Audio ())
Channel 2 Audio Input
Copilot (High)
The signal path
is shorted
Degraded Audio
Channel 2 High Sig-
nal
Fails to record − no audio
is recorded
38 Discrete FDR Data Rate (B) The signal path
is open
Only 64, 256 or 1024
Wps rates are avail-
able
The Main Processor may
generate an FDR fault
depending upon the rate
38 Discrete FDR Data Rate (B) The signal path
is shorted
Only 128 and 512
Wps rates are avail-
able
The Main Processor may
generate an FDR fault
depending upon the rate
39 Differential
ARINC429
(−)
OMS In 429 (B) The signal path
is open
OMS Input B 429 sig-
nal data is disrupted
and not recorded
No OMS 429 data
provided/recorded
39 Differential
ARINC429
(−)
OMS In 429 (B) The signal path
is shorted
OMS Input B 429 sig-
nal data is disrupted
and not recorded
No OMS 429 data
provided/recorded
40 Differential
ARINC429
())
OMS In 429 (A) The signal path
is open
OMS Input A 429 sig-
nal data is disrupted
and not recorded
No OMS 429 data
provided/recorded
40 Differential
ARINC429
())
OMS In 429 (A) The signal path
is shorted
OMS Input A 429 sig-
nal data is disrupted
and not recorded
No OMS 429 data
provided/recorded
41 Differential
Audio (−)
Channel 3 Audio Input
Pilot (Low)
The signal path
is open
Degraded Audio
Channel 3 Low Sig-
nal
Fails to record − no audio
is recorded
41 Differential
Audio (−)
Channel 3 Audio Input
Pilot (Low)
The signal path
is shorted
Degraded Audio
Channel 3 Low Sig-
nal
Fails to record − no audio
is recorded
42 Discrete CVR Ident Pin Pro-
gram
The signal path
is open
CVR may not be able
to be configured
CVR may not be able to
be configured
42 Discrete CVR Ident Pin Pro-
gram
The signal path
is shorted
CVR maybe incor-
rectly configured
CVR maybe incorrectly
configured
43 Differential
Audio ())
Channel 3 Audio Input
Pilot (High)
The signal path
is open
Degraded Audio
Channel 3 High Sig-
nal
Fails to record − no audio
is recorded
43 Differential
Audio ())
Channel 3 Audio Input
Pilot (High)
The signal path
is shorted
Degraded Audio
Channel 3 High Sig-
nal
Fails to record − no audio
is recorded
44 Discrete CVR Replay Inhibit
FDR Inhibit
The signal path
is open
FDR/CVR − Loses
ability to stop the
FDR function CVR
(only) − Stops audio
replay or read−out
FDR/CVR − Loses ability
to stop the FDR function
CVR (only) − Stops audio
replay or read−out
The document reference is online, please check the correspondence between the online documentation and the printed version.
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