Safety & tech

Max altitude / distance limit

Aircraft stops at limit — not geo-zone. DJI geo-fence, national UTM map, EU Remote ID, Betaflight arming flags.

A2STS editorial12 min read

Contents

Overview

Aircraft stops at limit — not geo-zone.

DJI geo-fence, national UTM map, EU Remote ID, Betaflight arming flags.

Symptoms

Typical "Max altitude / distance limit" signs in flight, app or OSD:

  • Max altitude reached
  • Return home distance limit
  • Cannot fly further
  • App error list — every red line before arming.

Common causes

Before replacing parts, rule out software, mechanical and environmental causes:

  • DJI fly safe limit 120 m (500 m CE)
  • Beginner mode
  • Custom limit in app

Tools needed

Prepare before diagnostics — saves time in the field:

  • National UTM map
  • NAA operator ID
  • DJI Fly geo unlock (if permitted)

Step-by-step fix

Work safely: battery off when working on ESC/motors; props removed; after repair — VLOS test flight.

  • App → fly safe / max altitude — adjust if legal (120 m Open EU).
  • Disable beginner mode after training.
  • EASA Open: 120 m AGL — limit may be legally required.

Additional diagnostics

App error list — every red line before arming.

Compare DJI geo with official NAA map.

RID broadcast — third-party RID reader for test.

When to contact service

If any of the following apply — do not fly and contact authorised service:

  • Official geo-zone prohibits flight — DJI unlock is not enough.
  • Remote ID error for commercial flight.
  • Aircraft flips after prop check — mechanical/service.

Prevention

Prevention reduces failure risk and supports EASA Open / VLOS compliance:

  • Know local limits

Frequently asked questions

Is it safe to fly with "Max altitude / distance limit"?
No if the fault affects navigation, power, ESC or link. Fix on the ground first, then conduct a VLOS test flight in open area.
How long does diagnosis take?
Most “Max altitude / distance limit” cases — 15–45 min on the ground. Complex ones (firmware, hardware) may need 1–2 h and service.
Must I register repair with the NAA?
No mandatory repair registration, but a maintenance log is recommended for commercial operations.

Authority & sources

A2STS Editorial · Reviewed by: EASA UAS syllabus aligned