COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 33
Apr. 14/16
Description and Operation
23–70–04
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to the restrictions on the cover page of this document.
B.
Aircraft Interface (AI) PWA
The Aircraft Interface (AI) PWA mounts within the rear of the Cockpit Voice Recorder
chassis and provides the interface between the aircraft and the Cockpit Voice Re-
corder’s Audio Compressor (AC) and Acquisition Processor (AP) functions. The Air-
craft Interface PWA also includes the storage power supply and provides RF filtering
and lightning protection for all input and output signals that interface with the aircraft.
Input and output signal conditioning is also provided for some signals.
Table 2. Aircraft Interface (AI) PWA Current Configuration Where Used
Aircraft Interface PWA
P/N
Model Effectivity
Notes
205E250305
2100
−
1010
−
00
2100
−
1020
−
00
2100
−
1020
−
02
2100
−
1220
−
00
2100
−
1220
−
02
205E250301
2100
−
1025
−
02
2100
−
1025
−
12
2100
−
1025
−
22
2100
−
1025
−
24
2100
−
1026
−
02
2100
−
1225
−
22
2100
−
1225
−
24
2100
−
1226
−
02
205E250308
2100
−
1027
−
02
2100
−
1227
−
02
Data Link
On
−
board Maintenance
System (OMS)
205E176311
2100
−
1010
−
50
2100
−
1010
−
51
2100
−
1020
−
50
2100
−
1020
−
51
Specifically, the Aircraft Interface RF Barrier function provides RF suppression on all
input and output signals needed to meet the requirements of RTCA/DO-160C Sec-
tions 20 and 21; while it provides for lightning protection on all input and output sig-
nals needed to meet the requirements of RTCA/DO–160C Section 22.
The ARINC 557/757A Aircraft Interface provides input signal conditioning for:
Audio Channel Inputs
Rotor Speed
Push-To-Test
GMT
Voice Erase
*Datal Link
Record
*OMS
Stop Recording
The document reference is online, please check the correspondence between the online documentation and the printed version.