This document makes a correction to Airworthiness Directive (AD) 2007-26-15, which was published in the Federal Register on January 3, 2008 (73 FR 400), and applies to all DG Flugzeugbau GmbH Model DG- 500MB gliders. AD 2007-26-15 requires that you modify the affected parts and exchange pages in the flight, maintenance, and repair manuals. The FAA incorrectly referenced the AD number as "2007-26-25" instead of "2007-26-15." Current language in Sec. 39.13 [Amended] of AD 2007-26-15 references "AD 2007-26-25" instead of "2007-26-15." This document corrects that paragraph by replacing the reference of "2007-26-25" with "2007-26-15."