TM 9-2350-247-20-1PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDINGLUBRICATION INSTRUCTIONS — Continued0128 00ITEMNO.INTERVALMAN-HOURITEM TO BECHECKED ORSERVICEDCREWMEMBERPROCEDUREEQUIPMENTNOT READY/AVAILABLEIF:63Semi-Annual(M548A3)QuickDisconnectCouplinga. Check quick disconnect coupling for proper fiton protective mask and orifice connectorassembly. Replace any defective coupling(WP 0538 00).64Semi-Annual(M548A3)OrificeConnectorAssemblya. Check valve and general condition of orificeconnector. Replace valve or orifice connector asrequired (WP 0538 00).65Semi-Annual(M548A3)Air Flow(3.0–4.5 cfm)(.08–.13 cum)NOTEAir flow should be 3.0–4.5 cfm (.08–.13cum) (cubic feet/meter per minute)a. Check each station using M39 air flow testerTM 3-6680-316-10.66Semi-Annual(M548A3)ID Platea. Replace identification plate if not legible(WP 0440 00).67Semi-Annual(M548A3)Painta. Paint surface to prevent rust or corrosionTB 43-0209.0128 00-78
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