> For the complete documentation index, see [llms.txt](https://docs.freeflysystems.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.freeflysystems.com/flying-sun/procedures/check-lists.md).

# Check Lists

### Setup Checklist: 

* [ ] FS500 aircraft → Install SL8, Air Unit.
* [ ] XT90 cable → connect to tether Air Unit
* [ ] Place aircraft in a takeoff area with at least a 5m/16 feet radius of clear space.
* [ ] Unfold aircraft and latch booms, remove proptectors.
* [ ] Connect AC power to tether unit, don’t turn on yet.
* [ ] It is suggested that the pilot wears sunglasses or has them at the ready.

### Preflight Checklist: 

* [ ] Pilot pro → booted and connected 
* [ ] Tether strain relief clip → attached to Astro
* [ ] Tether cable → constrained out of props
* [ ] XT60 plugged into to tether air unit.
* [ ] Tether cable → extra 3m/\~10ft spooled out 
* [ ] Astro powered on via single SL8 battery
* [ ] Pilot pro → D2 dial set to 0%
* [ ] Tether ground unit → check AC power is supplied
* [ ] Tether ground unit → activate blue breaker switch
* [ ] Tether ground unit → flip battery backup switch on
* [ ] Pilot pro → Flying Sun app → Enable high voltage
* [ ] Flying Sun app → confirm high voltage on
*

**\*\*\*DO NOT TOUCH THE TETHER GROUND UNIT OR CABLE WHILE HIGH VOLTAGE IS ACTIVE. 750 VOLTS CAN KILL YOU\*\*\***

* [ ] Pilot pro → D2 dial → turn on, confirm lights are working
* [ ] Pilot pro → D2 dial → turn off
* [ ] Pilot pro → AMC → Ensure Astro is in Position mode, ready to arm
* [ ] Take off

### Landing/Post Flight Checklist: 

* [ ] Astro land in position mode 
* [ ] Pilot pro → D2 dial set to 0%
* [ ] Pilot pro → Flying Sun app → disable high voltage
* [ ] Flying Sun app → confirm high voltage off
* [ ] Astro → turn off SL8 → disconnect tether cable
* [ ] Pilot pro → tether app → hold takeup button → Cable will retract
* [ ] Tether Ground Unit → Backup power switch off
* [ ] Tether Ground Unit → Blue breaker off
* [ ] Pack up 

<br>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.freeflysystems.com/flying-sun/procedures/check-lists.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.