Learjet 70 and Learjet 75 Central Maintenance Computer (CMC) File Downloading

Effectivity: All Learjet 70/75 aircraft

ATA 45

The periodic downloading of stored CMC files on the Garmin G5000 system, Phase II and Phase III, frees storage space and reduces the workload of the processors. CMC files accumulate over time and may cause slower than normal operation of certain operations. 

Garmin G5000 system CMC logs are stored internally to the system. When files become large enough some processes may slow enough to be observed on the displays, such as slow sweeps or blanking of the Weather Radar, maps taking longer than usual to load, etc.

It is recommended to delete, or download and save all CMC logs at least monthly, and/or when the NAV Database is updated. All procedures for downloading CMC logs can be found in the maintenance manual 45-45-04 1.A.(8) and (9).

For additional information, please contact your Bombardier Field Service Representative (FSR) or the Customer Response Centre (CRC) 24/7 at 1-866-538-1247.