TM 55-1930-209-14&P-19 Table 16-4.  Preventive Maintenance Checks and Services for Ventilation, Heating, and Air Conditioning System (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 HEATING AND AIR CONDITIONING (HAC) SYSTEM WARNING Make sure electrical components and cir- cuits are turned OFF before starting any inspection and/or cleaning.  Observe safety precautions specified in this man- ual. • • a.     Make sure that air outlets and ventilators Air outlets and are free of obstruction and not damaged. ventilators are damaged or obstructed. • • b.      Inspect HAC system operating controls Controls not oper- for damage.  Notify shift leader of defi- able. ciencies. • c.   Check HAC cooling and heating systems for proper operation.  Notify shift leader of deficiencies. • • d.      On barge 1 only, check each activated Fuses blown. forced air heater for proper operation. Check fuses and replace as necessary. • • e.      On barge 1 only, check that air flow from activated forced air heater is unob- structed.  Clear area around heater of any material which could be a fire or safety hazard. f.   Check drain for condensation or leaks. Class III leaks. Notify shift leader of class III leaks. 16-14