TM 5-4520-256-14 2-5.  OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES - Continued. Table 2-3.  Operator Preventative Maintenance Checks and Services B - Before D - During A - After W - Weekly M - Monthly Interval Item To Be Inspected Equipment is not Item Procedures Ready/ Available if: No. B D A W M 1 * * * Inspect access door for loose Door is missing or mounting, missing fasteners, inoperable. dents, or corrosion. 2 * * * Inspect lifting handles for loose mounting, missing fas- teners, missing parts, bends, or corrosion. 3 * Inspect instruction plates for loose mounting, missing fasten- ers, dents, and corrosion. 4 * * * Inspect control panel for bro- Broken or missing ken or missing knobs and bro- gages or switches. ken gages. * Inspect entire control panel for loose mounting, missing hardware, corrosion, or broken or missing controls/indicators. 5 * * * * Inspect power cable for frayed Exposed conductor. insulation, cracks, damaged connector, corrosion or deter- ioration of connector terminals. 6 * * * Inspect return and supply air ducts dust cover for cracks, holes, worn areas, broken chain, loose fit or insecure mounting. 7 * * * Inspect return and supply air Damaged duct tube. duct and clamps for holes, tears, and damaged duct clamps. 8 * * * Inspect external fuel connec- External fuel source tion for missing cap, damaged cannot be connected. threads and corrosion. 9 * * * Inspect fuel gage for broken glass, bent pointer, and cor- rosion. 2-6