TM 5-4220-231-14&P Change 7     3-3 Table 3-1 Unit Level PMCS Schedule. H-Hourly  M-Monthly  Q-Quarterly  A-Annually ITEM INTERVAL ITEM TO BE PROCEDURE Equipment is Not NO H M Q A INSPECTED Ready/Available if: 1 ° Diver Air Control Console (DACC) Inspect frame for broken or damaged welds, dents, or other damage. Damage prevents normal or safe operation. ° Inspect for missing or loose nuts, bolts, and fasteners. Check for loose or damaged interconnecting piping, fittings, and hoses. ° Clean and preserve console. 2 ° Filter, HP U281 Request general support to clean and inspect filter assembly. Request general support replace filter element as required. 3 ° Regulator, HP Operate regulator through turning arc. Regulator jams or operates sporadically. 4 ° Valves Turn each valve through a complete open and close cycle. Valve is jammed, broken, or does not perform function. ° Clean and inspect exterior of valve assemblies.  Lubricate valve stems. 5 °^Gages Calibrate IAW TB 9-4220-215-35 & TB 9-4220-216-35. Expired calibration due date NOTE Calibrate every 540 days or whenever inaccuracies are noted.