| 304-1 | Deviation of French registered gliders from German type certification | | German | English |
| 84-11 | 304-2 | Possible damage of wing structure with water ballast bags installed. Revision of flight manual | Before 1/5/1984 | German | English |
| 88-28 | 304-3 | Elevator drive bracket: replacement or reinforcement | Before 30/4/1988 | German | English |
| 88-281 | 304-4 | Extension of service life limit to 6000 hours | When reaching 3000 hours/before 31/5/1989 | German | English |
| 304-5 | Elevator drive bracket: Possibility of replacement by elevator drive bracket acc. to drawing No. 201-33-4 | | German | English |
| 304-6 | Tow releases: Optional use of model E85 instead of E72/E75 | | German | English |
| 304-7 | Minimum instrumentation (optional) | | German | |
| 304-8 | Modification of brake system to brake disk | | German | |
| 2000-318 | 304-9 | Extension of service life limit to 12000 hours | When reaching 6000 hours/before 31/12/2000 | German | English |
| 2003-005 | 304-10 | Replacement of aft rudder gimbal drive - rear actuator arm | Before 31/3/2003 | German | English |
| 304-11 | Installation of Mode-S-Transponder and Transponder Antennas | | German | English |
| EASA AS 2011-213 | 304-12 | Inspection / replacement of elevator control rod in vertical fin | 30 days/before 31/12/2012 | German | English |
| 304-13 | Optional installation of Winglets (in preparation) | | | |
| 304-13-E | Optional modification of the wing tip to operate the sailplane with the original tips or winglets | | | English |
| 2018-0143-E | 5-2018 | Deflector-angles at the C.G. release. Usage of connection ring pair meeting LN 65091 | Annual Inspection | German | English |
