Mission Predive Setup Procedure (Cont)

TM 5-4220-225-14 Table 2-2. Mission Predive Setup Procedure (Cont). Step Procedure g. Communications Whip Assembly. Remove the protective cap from the communications whip and inspect for damage, cuts, sharp bends, corroded contacts, and damaged threads. 2. HELMET ASSEMBLY a. Air Supply Assembly Check. (Intemal Checks) (1) Check the air supply tubing connection for tightness. Inspect tubing for corrosion and crimps. (2) Remove the air supply diffuser assembly and inspect the adapter for cleanliness, corrosion and thread damage. Inspect the O-ring for nicks or deterioration. Replace if necessary. (3) Disassemble the supply diffuser assembly and inspect for dirt, oil, and moisture.Inspect threaded parts for corrosion or damage.Clean or replace parts as necessary. Replace the filter elements if necessary NOTE Do not reinstall diffuser assembly until relief valve test has been satisfactorily completed. 3. OPERATIONAL TEST a. Relief Valve Test. Perform relief valve test in accordance with paragraph 2-8, c. b. Drysuit Leak Test. NOTE Leak test of the drysuit could be performed at any time. There is no hard fast rule for drysuit testing. Perform drysuit leak test in accordance with paragraph 2-8, d, as necessary. 2-30