SN4500 Service Bulletins and Service Information Letters

To download the latest software for the SN4500 unit please use the following form: 
Software Update Download

SIL 4500-14: MOD A and Software version A2.05 - 1/24/2014

SIL 4500-12: Flux gate failure annunciation - 8/14/2012

SIL 4500-11: Software version 2.05 - 9/20/2012

SB 4500-09: Software version 2.01 - 3/25/2010

SB 4500-08: Display discoloration - 8/20/2009

SIL 4500-07: Software version 1.05 - 11/20/2008

SB 4500-06: SN4500 interfaced with WSI datalink weather receiver - 4/18/2008

SB 4500-05 Software version 1.04 - 4/18/2008

SIL 4500-04: Software version 1.03 - 12/21/2007

SIL 4500-03: Compatibility with WSI AV-300/350 datalink weather receivers - 11/30/2007

SB 4500-03: Software version 1.02 - 3/27/2007

SIL 4500-02: Interfacing with Garmin GNS 400W/500W series receivers - 3/7/2007

Note: Software version 1.03 and higher allows display of GPS approach vertical deviation without the addition of the analog lateral and vertical deviation wiring described in this SIL.

SB 4500-01: Grounding of bezel assembly - 12/6/2006