TM 5-4220-231-14&P Table   2-2.    Operator    Preventive    Maintenance    Checks    and   Service   For Chamber    Operations     - (Con't). B-Before D-During A-After W-Weekly ITEM INTERVAL ITEM   TO    BE   INSPECTED. Equipment is NO Not    Ready/ B D A W PROCEDURE Available If: 15 0 0 Ensure protective caps are    secured to   back panel Protective Con't with   retaining cable and    set   screws. Replace as caps are required.   missing. 0 Ensure protective caps are secured to   hose connectors. Replace as   required. 16 0 0 Piping (16). Inspect piping on   back of  DASS panels for   bent, dented, or   damaged pipes. Check for   loose fittings. Tighten as    required. 17 0 0 DASS     Frame     Assembly (17). Inspect frame for cracked, deteriorated, or   damaged weld    joints, dents, breaks, or   other damage. Ensure lift  rings are secured to   frame. Replace or tighten as    required. Inspect five   rubber support feet    for   damage. Replace if  missing or   damaged. Inspect rubber flask    seating blocks for Blocks are deterioration or   damage. Replace as    needed. missing. Inspect flask straps to   ensure flasks are    secure. Tighten as    necessary. Ensure cotter pins are    in place. Replace as    required. 2-37