most of the time between , while the upper cloud ceiling was at , rendering flight conditions outside the official operational specification for the Me 262. The jet was not fully cleared for instrument flight, mandating a lower cloud ceiling of more than . Major Erich Rudorffer, Gruppenkommandeur of the I./JG 7, was attending a meeting at the Luftgaukommando in Hamburg-Blankenese, when Oberleutnant Hans Grünberg, the most senior officer on duty and Staffelkapitän of the 1st Staffel, received the order from Major Richter, the Ia (operations officer), to engage inbound heavy bombers. Grünberg initially argued that weather conditions prohibited a safe takeoff but Reichsmarschall Hermann Göring intervened and ordered the jets to engage the enemy. The order resulted in the death of both Waldmann and his wingman Schrey on the following mission. Waldmann was killed following a mid-air collision with Leutnant Hans-Dieter Weihs shortly after takeoff, and Schrey was killed in combat with US fighters. Mindful of the direct order of the Reichsmarschall, Oberleutnant Grünberg (1st Staffel), Oberleutnant Fritz Stehle (2nd Staffel) and Waldmann (3rd Staffel) had decided that each of them would lead a flight of four Me 262s, taking off and flying around for an hour before returning without trying to engage the enemy. Grünberg's Schwarm took off first followed by Stehle's Schwarm. Waldmann chose Weihs, as the most experienced pilot trained in instrument flight, to lead the Schwarm, while Schrey once again served as Waldmann's wingman. Waldmann's Me 262 A-1 "Yellow 3" (Werknummer 117097—factory number) took off at 12:24 and Weihs ordered the Schwarm to form a close formation, flying wing tip to wing tip. Only three Me 262s took off; Flieger Gerhard Reiher's Me 262 had experienced engine failure. Four minutes into the flight, having travelled roughly and flying at less than above the ground, Weihs' aircraft experienced a heavy blow from below after Waldmann collided with him. His jet in an unrecoverable spin, Weihs bailed out and came down near the Hamburg-Berlin railroad tracks. The airfield at Kaltenkirchen was immediately informed. Waldmann and Schrey were initially believed missing. Waldmann's body was recovered the next day near Schwarzenbek, roughly away from the crash site of his Me 262. Apparently he had managed to bail out but failed to deploy his parachute in time, although the injuries sustained during the crash with Weihs' aircraft may have already been fatal as the recovery party found Waldmann with his