NORMAL MWO effective date is 1 Apr 1992 and completion date is 31 Dec 1996 MWO 9-2300-200-20-1 MODIFICATION WORK ORDER MODIFICATION OF 6-TON TACTICAL EXPANSIBLE VAN SEMITRAILERS AND 2-1/2 AND 5-TON 6X6 TRUCK EXPANSIBLE VANS ENCLOSURE OF ASBESTOS CLOTH INSULATION IN VAN BODY HEAT DUCTS M313 (NSN 2330-00-772-5273) M447 (NSN 2330-00-542-5709) M447C (NSN 2330-00-472-9999) M749 (NSN 2330-00-587-2454) M750 (NSN 2330-00-926-7035) M291A1 (NSN 2320-00-880-4642) M291A1D (NSN 2320-00-880-4647 M291A2C (NSN 2320-00-907-0707) M820 (NSN 2320-00-050-9006) M820A1 (NSN 2320-00-050-9007 M820A2 (NSN 2320-00-050-9010) M292A1 (NSN 2320-00-440-8318) M292A2 (NSN 2320-00-077-1642) M292A5 (NSN 2320-00-699-3746) Headquarters, Department Of The Army, Washington, DC 30 September 1991 REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this MWO. If you find any mistakes or if you know of a way to improve these proce- dures, please let us know. Write a letter or complete and mail in a DA Form 2028, Recommended Changes to Publications and Blank Forms, to: Commander, U.S. Army Tank-Automotive Command, Attn: AMSTA-MB, Warren, Ml 48397-5000. A reply will be provided to you. Approved for public release; distribution is unlimited. 1. PURPOSE. The purpose of this modification is to enclose (seal up) asbestos cloth insulation contained inside heat duct areas in fielded M313/M447/M749/M750 6-ton tactical van semitrailers, and M292A1/M292A2/M292A5 2-1/2 ton truck vans and M291 A1/M291A2/M291A2C/M820/M820A1/M820A5 5-ton 6x6 truck vans. Insulation enclosure will eliminate friable asbestos fibers from the van body breathing zone, thus maintaining a hazard-free inhalation environment. This modification will further render target truck vans/semitrailer vans safe in compliance with Occupational Safety and Health Administration (OSHA), De- partment of Defense (DOD), Department of the Army (DA) and Environmental Protection Agency (EPA) stan- dards for permissible exposure levels to environmental carcinogenic fibers/materials.