TM 9-2320-209-34-2-3 c. Vent Operating Test. FRAME 1 Soldier A 1. Soldier B 2. END OF TASK Cover opening in tube (1). Using soapy water, check that there are no connection ( 2). If bubbles appear, tighten more repair is needed, refer to para 21-21. pressure leaks around clamp screw (3). If 21-143