Operator Preventive Maintenance Checks and Services (Cont)

TM 5-4220-225-14 Table 2-1. Operator Preventive Maintenance Checks and Services (Cont). Interval Item Item to be Inspected. Equipment Will Be No. B D A Q Procedure Reported Not Ready If HELMET ASSEMBLY (Cont) 14. Helmet Assembly Testing. NOTE Perform quarterly and prior to use. • a. Vacuum Test.Perform vacuum test of the one Helmet fails test. way valve in accordance with procedures given in paragraph 2-8, a. • b. Flow/P Test.Perform helmet flow/P test in Helmet fails test. accordance with procedures given in paragraph 2-8, b. • c. Leak Test.Perform helmet leak test in accor- Helmet fails test. dance with the procedures given in paragraph 2-8, b. • d. Relief Valve Test.Perform relief valve test in Helmet fails test. accordance with the procedures in paragraph 2-8, c. • e. Communication Check.Perform communication Helmet fails test. check in accordance with procedure in paragraph 2-10, e. DRESS ASSEMBLY NOTE Perform quarterly when the dress assembly has been stowed for prolonged periods, and before and after each use. 15 Drysuit Inspection. • • a. Ensure the butyl rubber neckpiece and zipper laminations are secure. • • b. Inspect the suit for possible open seams, tears, abrasions, and punctures. 2-10