Record all deficiencies and shortcomings, along taken, on DA Form 2404. The Item Number column numbers used on the TM Number column on DA Form TM10-3930-660-20 with the corrective action is the source for the 2404. 2-7. ORGANIZATIONAL  PREVENTWE  MAINTENANCE  CHECKS  AND SERVICES a. The item numbers of the table indicate the sequence of PMCS. Perform at intervals  shown  below: a. Do your (Q) PREVENTIVE  MAINTENANCE  quarterly  (every  three  months). b. Do your (S) PREVENTIVE MAINTENANCE semiannually (every six months). c. Do your (A) PREVENTIVE MAINTENANCE annually (once every year). b. If something doesn’t work, troubleshoot it according to the instructions in this manual or notify your supervisor. c. Always do your preventive maintenance in the same order, so it gets to be a habit. Once you’ve had some practice, you’ll spot anything wrong in a hurry. d. If anything looks wrong and you can’t fix it, write it down on your DA Form 2404. If you find something seriously wrong, report it to Direct Support Maintenance as soon as possible. Dry cleaning solvent P-D-680 is toxic and flammable. Wear protective goggles and gloves and use only in well ventilated area. Avoid contact with skin, eyes and clothes and don’t breathe vapors. Do not use near open flame or excessive heat. The flash point is 100 TO TF-138 To TF (38 To TC-50 To TF). If you become dizzy while using cleaning solvent, get fresh air immediately and get medical aid. If  contact with eyes is made, wash your eyes with water and get medical aid immediately. Compressed air, used for cleaning purposes will not exceed  30  psi. Use only with effective chip guarding and personnel protective equipment (goggles/shield/ gloves,  etc.) (1) Keep it clean: Dirt, grease, oil and debris only get in the way and may cover up a serious problem. Clean as you work and as needed. Use dry cleaning solvent (P-D-680) to clean metal surfaces. Use soap and water when you clean rubber or plastic material. 2-3