Service Bulletins for VDR Deafness Update
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The following Rockwell Collin radios have been updated to address the VDR deafness problems:
VDRS with any of the following part numbers:
- VHF-4000 CPN 822-1468-290
- VHF-4000 CPN 822-1468-380
- VHF-4000 CPN 822-1468-390
- VHF-4000 CPN 822-1468-303
- VHF-4000E CPN 822-1872-390
- VHF-4000F CPN 822-2993-390
- VHF-2200 CPN 822-2763-020
- VHF-2200 CPN 822-2763-050
- VHF-2100 CPN 822-1287-121
- VHF-2100 CPN 822-1287-141
- VHF-2100 CPN 822-2168-121
VDRS with any of the following part numbers with the associated service bulletin installed:
- VHF-4000 CPN 822-1468-210 with SB 8 or SB 13
- VHF-4000 CPN 822-1468-310 with SB 8 or SB 13
- VHF-4000 CPN 822-1468-302 with SB 11
- VHF-4000E CPN 822-1872-310 with SB 8 or SB 13
- VHF-4000F CPN 822-2993-310 with SB 9
- VHF-920 CPN 822-1250-002 with SB 16
- VHF-920 CPN 822-1250-020 with SB 17 (or SB13 and SB15 both installed)
- VHF-2100 CPN 822-1287-101 with SB 7
- VHF-2100 CPN 822-1287-120 with SB 501
- VHF-2100 CPN 822-1287-180 with SB 7
- VHF-2100E CPN 822-2168-101 with SB 7