TM9-2320-209-10-2/T036A12-lB-1091 -2 Table 4-1. Operator/Crew Preventive Maintenance Checks and Services for Special Purpose Kits - Cent NOTE: These checks are to be made in the order listed, within designated interval. B-B efore operation A-After operation M-Monthly D-During operation W-Weekly Change 1 4-3