Lessons Learned, Headquarters, 31st Engineer Battalion Open PDF Document Details Document Type Technical Report Publication Date Nov 13, 1969 Accession Number AD0866092 Entities Organizations Adjutant General's Corps Tags Communities of Interest Air Platforms Biomedical DTIC Thesaurus Topics Air Traffic Aircraft Maintenance Aircrafts Civilian Personnel Concrete Construction Engineers Fixed Wing Aircraft Housing Projects Lessons Learned Maintenance Preventive Maintenance Security Training United States Warfare Water Pumps