Advanced Aerospace Designs has released Public Service Bulletin PSB-02-2018 which requires all Vigil 2 automatic activation devices with serial numbers from 16,000 to 21,999 to be inspected by the manufacturer. After an AAD malfunctioned, the problem was traced to an unreliable electrical connection within the AAD. The company has inspected 200 units without finding a similar problem, but has decided to check all of the affected units as a precaution. The PSB describes the process required for each affected unit. The inspection is mandatory and it can be completed at the next reserve repack, or by no later than December 31, 2019. The company will also update the software and replace the battery, since the affected units are within two years of a required battery change, anyway. More information is available in the PSB.