Gps Selected Course Sources; Total Air Temperature Sources; Static Air Temperature Sources - Garmin GTN 635 Installation Manual

3.3.7

GPS Selected Course Sources

The GTN unit can accept GPS selected course data from multiple ARINC 429 sources. If multiple
sources of GPS selected course data are supplied to the GTN, only valid data from the highest priority
source is used. If the highest priority source becomes unavailable, data is taken from the next-highest
priority source. Priorities of the GPS selected course sources are as follows from highest to lowest:
1. ARINC 429 label 100 from EFIS Format 1 or 3
2. ARINC 429 label 100 from GDU Format 1
3. ARINC 429 label 100 from EFIS Format 2
4. ARINC 429 label 100 from EFIS Format 4
5. ARINC 429 label 100 from GAD Format 1
6. ARINC 429 label 100 from Data Concentrator
7. TO/FROM course from an Omni-Bearing Selector (OBS) control
3.3.8

Total Air Temperature Sources

The GTN unit can accept total air temperature data from multiple ARINC 429 and RS-232 sources. If
multiple sources of total air temperature data are supplied to the GTN, only valid data from the highest
priority source is used. If the highest priority source becomes unavailable, data is taken from the next-
highest priority source. Priorities of the total air temperature sources are as follows from highest to
lowest:
1. ARINC 429 label 211 from Airdata
2. ARINC 429 label 211 from GDU Format 1
3. ARINC 429 label 211 from EFIS Format 2
4. ARINC 429 label 211 from Data Concentrator
5. RS-232 bus from FADC Format 1 or Airdata Format 1
3.3.9

Static Air Temperature Sources

The GTN unit can accept static air temperature data from multiple ARINC 429 sources. If multiple
sources of static air temperature data are supplied to the GTN, only valid data from the highest priority
source is used. If the highest priority source becomes unavailable, data is taken from the next-highest
priority source. Priorities of the static air temperature sources are as follows from highest to lowest:
1. ARINC 429 label 213 from Airdata
2. ARINC 429 label 213 from GDU Format 1
3. ARINC 429 label 213 from EFIS Format 2
4. ARINC 429 label 213 from Data Concentrator
GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 3-5
Rev. C