On 1 April 1944, 7. Staffel relocated to an airfield at Terespol. On the first mission from this airfield, the Staffel escorted Heinkel He 111 bombers on a mission to Kovel. Northwest of Kovel, the Staffel intercepted 15 Il-2 ground-attack aircraft. In the aerial encounter, 7. Staffel pilots without loss of their own claimed eight Il-2s shot down, including two by Weber. In April 1944, III. Gruppe began re-equipping with the Bf 109 G-6 with 7. Staffel making the transition in early May at an airfield at Dęblin–Irena. On 28 May, III. Gruppe of JG 51 received orders to transfer one Staffel to the west in Defence of the Reich. The Gruppenkommandeur (group commander) Hauptmann Diethelm von Eichel-Streiber selected Weber's 7. Staffel which was then subordinated to the II. Gruppe of Jagdgeschwader 1 (JG 1—1st Fighter Wing).
