Garmin G3X Panel Avionics Unit Instruction Manual
Garmin G3X Panel Avionics Unit
Garmin G3X Panel Avionics Unit
Garmin G3X Panel Avionics Unit
Garmin G3X Instructions
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Garmin G3X Panel Avionics Unit Specifications
| Feature | Specification |
|---|---|
| Display unit models | GDU 370 (WAAS VFR GPS) and GDU 375 (WAAS VFR GPS plus SiriusXM receiver) |
| Display unit part number | 010-00667-15 |
| Display type | Color WVGA, 800 × 480 pixels |
| Screen size | 7 in diagonal, 22 sq in viewable area |
| Dimensions (W × H × D) | 6.04 in (153.4 mm) × 7.83 in (198.8 mm) × 3.41 in (86.6 mm) |
| Weight | GDU 370: 1.6 lb (1.8 lb with connectors); GDU 375: 1.7 lb (1.9 lb with connectors) |
| Panel cutout | 7.33 in (186.2 mm) × 5.57 in (141.4 mm) |
| Mounting | 4 captive #6 screws with 3/32 in hex; nut plate 115-01054-00 if 6-32 threads cannot be tapped |
| Supply voltage | 14 or 28 VDC, dual diode-ORed power inputs |
| Current draw (100% backlight) | 1.10 A at 14 V; 0.540 A at 28 V |
| Operating temperature | −20 °C to +60 °C |
| Main connector | J3701, 50-pin D-sub (connector kit 011-01921-00) |
| Interfaces | CAN bus (ISO 11898), 3 RS-232 ports, mono and stereo audio outputs |
| Lighting bus inputs | 14 V (pin 43) or 28 V (pin 26) |
| Internal GPS receiver | 12 channels, 5 Hz update rate, accuracy better than 10 m |
| GPS acquisition times | Warm start under 5 s; cold start under 45 s; AutoLocate under 60 s |
| GPS antenna supply | 4.5 to 5.0 V, 50 mA maximum (not compatible with GA 35/36/37) |
| System size | 1 to 3 GDU 37X displays; up to 3 ADAHRS and 2 standby instruments |
| Recommended SD card | 2 GB SanDisk or Toshiba (SD/SDHC up to 32 GB, FAT32; SDXC not supported) |
| Map range scales | 23 scales, 200 ft to 800 nm |
| Flight plans | Up to 50 plans, 300 waypoints each |
| User waypoints | Up to 3000, names up to 10 characters |
| Flight log / track log | 50 flights stored; up to 15 saved tracks |
| Data logging | 1 record per second in .csv format; over 1000 hours on a 2 GB card |
| Software covered | System software v11.80 or later (Pilot's Guide 190-01115-00 Rev. Q) |
| Certification | Non-TSO; for experimental and light sport aircraft only |
| Warranty | 2 years or 800 flight hours, whichever comes first |
Garmin G3X Panel Avionics Unit Details
The Garmin G3X panel unit is the core display of an integrated glass cockpit for experimental and light sport aircraft. Each GDU can run as a PFD or MFD, and two-display setups can show full or split screens. If PFD1 fails, the MFD goes into reversionary mode. If the MFD fails, the remaining PFDs revert. If the GDU 375 fails, the weather and XM pages are lost. A pin-strapped switch can also force reversionary mode manually.
The primary flight display includes an airspeed tape with a 6-second trend vector, configurable V-speeds and an optional TAS-adjusted VNE band. Other PFD elements are a HSI with two bearing pointers, baro minimums alerting, and altitude alerts at 1000 ft and 200 ft. A G-meter appears automatically when load or attitude limits are exceeded. With a GAP 26 probe and GSU 25 ADAHRS, the display adds angle-of-attack cues and an audible stall warning tone.
The engine indication system supports Lean Assist. It detects the EGT peak and tells you whether the engine is running rich or lean of peak. The fuel calculator tracks the burn from measured fuel flow and asks you to confirm the fuel quantity after refueling. CAS messages are color-coded: red for warnings, amber for cautions and white for advisories. Master Warning and Master Caution discrete outputs can drive external annunciator lamps.
The moving map includes Synthetic Vision with Pathways boxes, fuel range rings and glide range rings. A Best Airport function picks a runway within gliding distance. Weather can come from SiriusXM (GDU 375) or free FIS-B on 978 MHz. Products include NEXRAD, METARs, TFRs and winds aloft. Traffic is shown from TIS-A, ADS-B or a GTS 800 system. Terrain alerting gives spoken cautions and warnings, but it is not a certified TAWS.
The unit connects to Garmin's GFC autopilot through GSA 28 servos and GMC mode controllers. Supported modes include altitude hold, vertical speed, VNAV, glidepath and coupled ILS approaches. The ESP system gently nudges the aircraft back toward a normal attitude and airspeed when the autopilot is off. It also includes a level mode. Integrated control of Vertical Power devices handles trim, flaps and wig-wag lights from the softkeys.
For upkeep, you use the SD card to update software and databases, load .ace checklists, export track logs and import flight plans. Database cycles are 28 days for navigation and FliteCharts, 56 days for SafeTaxi and obstacles, and 14 days for ChartView. Clean the anti-reflective lens with a lint-free cloth and never use ammonia-based cleaners. Polarized sunglasses can make the screen look dark. The unit has no user-serviceable parts.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Garmin G3X Panel Avionics Unit, and we answer them below.
