Navigation & Instruments
ATA Chapter 34 — N720AK Systems Reference
Overview
N720AK’s navigation and instrument suite is built around the Dynon Skyview HDX EFIS as the primary flight display, with the Garmin GTN 650 providing certified IFR GPS/Nav/Com capability. The pitot-static system uses a Dynon heated pitot with integrated AoA probe.
Components
| Component | Part Number | Supplier | Notes |
|---|---|---|---|
| EFIS | Skyview HDX | Dynon | Primary flight display |
| GPS/Nav/Com | GTN 650 | Garmin | Certified IFR, S/N 1Z8021616 |
| Transponder | SV-XPNDR-261 | Dynon | ADS-B Out, S/N 04015 |
| ADS-B Receiver | SV-ADSB-470 | Dynon | Traffic & weather, S/N 3111 |
| ELT | ELT 345 | Artex | 406 MHz |
| Pitot tube | Dynon | Heated, with AoA | |
| Static ports | Two ports, aft fuselage | ||
| Alternate static valve | Upper left panel | ||
| Transponder antenna | 104-12 | SteinAir | Monopole, 1030–1090 MHz, BNC |
| ADS-B antenna | 104-17 | SteinAir | Monopole, 978 MHz, BNC |
How It Works
Dynon Skyview HDX
The Skyview HDX provides:
- Primary Flight Display (PFD) — attitude, airspeed, altitude, heading, VSI
- Multi-Function Display (MFD) — moving map with terrain
- Engine monitoring — all EGT, CHT, oil, fuel flow, fuel pressure
- Traffic display (ADS-B In)
- Autopilot interface
- Checklists
Dynon Equipment Serial Numbers (registered 2017-05-28):
| Product | Serial Number |
|---|---|
| SV-HDX1100 Display | 11672 |
| SV-HDX1100 Display | 11668 |
| SV-HDX800 Display | 10980 |
| SV-ARINC-429 Module | 2360 |
| SV-EMS-220 Engine Monitoring | 6468 |
| SV-XPNDR-261 Transponder | 04015 |
| SV-ADSB-470 ADS-B Receiver | 3111 |
| SV-ADAHRS-200 (Primary) | 8375 |
| SV-ADAHRS-201 (Secondary) | 4928 |
| SV-AP-PANEL/V Autopilot Panel | 4101 |
| SV42T Autopilot Servo | 50220 |
| Heated AOA/Pitot Probe | 8438 |
| SV-KNOB-PANEL/V Knob Panel | 8500 |
| SV-COM-C25/V Com Radio | 3090 |
Nearest Airport Emergency: Holding the NEAREST button on the Dynon activates the autopilot to fly directly to the nearest airport matching the current filter settings and automatically tunes the radio to that airport’s frequency. See the Dynon HDX Pilot’s Guide for filter configuration and exact behavior.
Garmin GTN 650
The GTN 650 provides:
- IFR-certified GPS approaches (LPV, LNAV/VNAV, LNAV)
- VOR/ILS capability via single Bob Archer nav antenna
- Com radio
- Flight plan management
SD Card Formatting: The GTN 650 SD card must be formatted using the SD Card Formatter utility. Formatting with macOS Disk Utility or Windows (including Parallels) does NOT work. (VAF thread)
Garmin GTN 650 Database Update
- On a Windows machine, open Garmin Aviation Database Manager and download the current navigation database
- Write the database to an SD card formatted with the SD Card Formatter utility (do NOT use macOS Disk Utility or Windows format)
- Insert the SD card into the GTN 650
- Power on — the unit should prompt to load the database on startup
- If the database shows as a “future” database and does not load automatically, hold down the right knob click button during startup to force-load the database
Pitot-Static System
| Component | Location |
|---|---|
| Pitot tube | Under left wing |
| Static ports | Two ports on aft fuselage sides |
| Alternate static valve | Upper left panel |
The pitot tube incorporates a second orifice angled to measure differential pressure for Angle of Attack (AoA) display on the EFIS. Pitot heat is activated by the PITOT HEAT switch.
Inspection & Maintenance
Alternate Static Valve
The alternate static source valve is a toggle on the upper left panel. Reference: Steinair pitot-static toggle switch
Right Wing Com Antenna Access
To install or remove the right wing com antenna, the outboard aileron push-pull tube must be removed first.
91.411 / 91.413 Inspections
Per 14 CFR 91.411 and 91.413, the altimeter system and transponder must be inspected every 24 calendar months if operating in controlled airspace requiring this equipment (IFR flight, Class B/C airspace).
ELT — Artex ELT 345
- Beacon ID: 2DC88 5940E FFBFF
- Registration: NOAA SARSAT, registered 2025-11-18, expires 2027-11-18
- Frequency: 406 MHz
- Registration portal: beaconregistration.noaa.gov
- Registration form PDF saved in GDrive
Private/Registration/ELT_registration_form.pdf
Battery: Artex P/N 8322 (replacement ordered via Aircraft Spruce, order #17716532, 2025-11-12)
References
- Dynon SkyView HDX Pilot’s Guide (Rev R)
- Dynon SkyView HDX Pilot’s Guide (Rev Q)
- Dynon SkyView EMS Gauge Customization
- Dynon SkyView Third-Party Device Connection (Rev E)
- TLAR Pilot Guide (v7.80)
- Pitot/Static/AOA Air Kit Installation Guide (Rev 04) — Quick-disconnect plumbing kit. Variants: A=SkyView ADAHRS, B=EFIS+backups, C=Steam. Tubing: 25’ green (pitot), 32’ white (static), 23’ blue (AOA), all 1/4“.
- Gretz Aero Pitot Tube Mounting Bracket Installation — Left wing bottom, outboard of main spar inspection plate.
- Dynon AOA/Pitot Probe Installation Guide (Rev C) — P/N 100141-000 (unheated), P/N 100667-000 (heated). Doc 100740-001.