TM 55-1930-209-14&P-19 Table 12-4.  Preventive Maintenance Checks and Services for Communications Systems (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY     d.  Check for normal operation of foghorn. Foghorn does not Foghorn should sound at 18 second sound at 18 second intervals.  In cold weather, allow foghorn intervals. remote control to warm up before sound- ing foghorn.  Notify shift leader or barge- master so that malfunction can be corrected. e.  Check for loose plugs and jacks. Tighten as necessary. f.  Check for loose mountings, hardware, brackets, etc.  Tighten as necessary. g.  Check for frayed or damaged cables. Cables damaged Replace if necessary. or frayed. 3 Telephone System   a.  Check for complete installation of tele- phone system components. b.  Check for corrosion or rust. Clean and touch up paint as necessary in accor- dance with TB 43-0144 to match surrounding area. DO NOT paint threads or labels. c.  Check controls for missing, loose or Switches or push- brroken switches and pushbuttons. buttons missing or broken. d.  Check for normal operation of phone. Notify shift leader or bargemaster so that malfunction can be corrected. e.  Check for loose plugs and jacks.  Tighten as necessary. f.  Check for loose mountings, hardware, brackets, etc.  Tighten as necessary. g.  Check for frayed or damaged cables. Cables frayed or Replace as necessary. damaged. 12-6