![]() ![]() This high level of noise caused an undesirable oscillation of the CDI outputs which resulted in inaccurate course deviation as seen in the CDI/HSI. ![]() ![]() Investigation determined that these installations had electrical noise between 1 & 3 volts AC peak-peak induced into the GNS 430 CDI output which came from other items installed in the aircraft. Recently, GARMIN received a limited number of reports regarding GNS 430 installations where the deviation indicator on the CDI/HSI was offset by a couple of dots from the actual course. SERVICE BULLETIN NO.: 9905 DATE: 17 SEPTEMBER 1999 SUBJECT: GNS 430, GNC 420, GPS 400 MOD 1 BACKGROUND The GNS 430, GNC 420 and GPS 400 units have been designed and tested to meet or exceed all TSO requirements, including susceptibility to noise being generated from other sources within the aircraft. Now let's go over the Service Bulletin that describes Mod 1. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |