TM   10-3930-643-20 PRELIMINARY   PROCEDURES. 3-5. Organizational   Preventive   Maintenance   Checks   and   Services   (PMCS). Organizational   Preventive   Maintenance   Checks   and   Services ITEM TO BE INSPECTED PROCEDURE: CHECK FOR AND HAVE REPAIRED, FILLED, OR ADJUSTED AD NEEDED PERFORM ALL OPERATOR PMCS FIRST Q-Quarterly A-Annually H-Hours I t e m    I n t e r v al No. Q A H Equipment Procedure 3 100 ENGINE  MOUNTS Inspect   for   cracks,   deterioration and  wear. Notify  Direct  Support if   replacement   is   necessary. 100 DRIVE  BELTS Check   belt   tension.   Refer   to paragraph   4-33. 4 3-7