CAA Update on DJI TB50 & TB55 Batteries.

SN-2018/011: Small Unmanned Aircraft DJI Battery TB50 and TB55 In-Flight Power Failures

This Safety Notice provides updated instructions and guidance regarding the DJI TB50/55 series of batteries and supersedes SN-2018/010.

The text highlights the updated battery firmware that has was released by the manufacturer on 16 November to correct previous instances where power has been unexpectedly lost. The aircraft operating restrictions that must now be observed are dependent on whether or not the manufacturer’s recommended updates have been successfully installed.

After reviewing evidence from DJI, the CAA are in a place to remove some of the current restrictions if an operator can successfully apply the DJI workaround (and verify this). They do ask that all operators still proceed with caution and immediately return to home or hover if the device doesn’t behave as expected. They will continue to monitor this issue daily, working with DJI and reviewing operator feedback

Posted 22/11/2018