TM 10-3930-659-20 Table 3-1.  Preventive Maintenance Checks and Services (PMCS). Location Not Fully Item Item to Mission No. Interval Check/ Service Procedure Capable If: NOTE • Prior to beginning PMCS, per- form all applicable lubrication procedures In LO 10-3930- 659-12. • If AOAP laboratory support is not   available,   additional PMCS procedures may have to be scheduled In accor- dance with hard time Intervals contained In LO 10-3930- 659-12. 1 Quarterly Cab Fresh Air Filter WARNING If NBC exposure Is suspected, all engine air cleaner air filter media should be handled by personnel wearing protective equipment. Consult your NBC Officer or NBC NCO for appropriate handling or disposal procedures. Check cab fresh air filter for contami- nation and damage.  Clean or replace cab fresh air filter (see para- graph 14-13). 2 Quarterly Cab Recir- Clean cab recirculating filter (see culating paragraph 14-14). Filter 3 Quarterly Air Cleaner Check air cleaner intake cover for Intake damage and buildup of dirt or con- Cover tamination.  If dirty, clean with deter- gent (Item 17, Appendix C) and water. 3-4