SB001 Alta X – Motor 1 start failure (1/17/20)(Obsolete)

> SUPERSEDED BY SB002 Alta X – Intermittent Motor Start Failure on 2/17/2020 < 


Date Released: Jan 17 2020

Effectivity: All Alta X


This service bulletin is being issued to alert all Alta X pilots of an intermittent failure of Motor 1 upon initial startup.


Freefly has received ~5 reports of Motor 1 not starting properly in the field. Freefly has initiated an internal investigation to determine the root cause of this issue.


Some key points to convey regarding this issue:

  • Motor 1 is always the motor that does not start.

  • A reboot of the machine has cleared the issue so that normal operation can continue.

  • Throttling up the Alta X without motor 1 starting can cause a tip over.

  • We have received no report of motor failure in flight, the failure mode appears to only exist upon startup. Once a motor is spinning there is no evidence that the issue can occur.


  1. Always visually confirm motor 1 is spinning prior to liftoff
  2. Always perform an attitude control flight check prior to takeoff (demonstrated here)
  3. In case of a motor 1 failure to start, disconnect Alta X flight batteries and reboot machine
    • Please file a ticket with customer support so we can investigate and track this issue

Freefly will be issuing follow on updates as our investigation unfolds.

See attached PDF for full details

Still need help? Get in touch with our support team.

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