EASA AD 2019-0079 calls for inspection/replacement of the airbrake components in the wing root.
Schempp-Hirth TN 349-41 / 825-56 refers, with associated Working Instruction.
The airbrake funnels must be replaced within 1 year from 17th April 2019
EASA AD 2019-0079 https://ad.easa.europa.eu/blob/EASA_AD_2019_0079.pdf/AD_2019-0079_1
S-H TN 349-41 / 825-56 & WI to TN 349-41 / 825-56 both available from S-H website (registration required)