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
UMBILICAL HOSE/AIR SUPPLY WHIP
ASSEMBLIES (Cont)
27.
Communications/Strength Cable.
•
•
Inspect for damaged fittings, corrosion, verdigris,
Inspection reveals any of the
and the condition of the outer cover, especially for
defects sighted above or
blisters. Notify you supervisor if damage is found.
any defect that renders the
helmet inoperable.
28.
Pneumofathometer Hose.
•
•
a.
Inspect the hose assembly for wear and
deterioration.
•
•
b.
Inspect coupling for deterioration, damage,
corrosion, and verdigris.
NOTE
Perform annually or as often as required.
•
•
c.
Inspect for blisters, cuts, and abrasions.
Inspection reveals any of the
defects sighted above or
any defect that renders the
helmet inoperable.
2-8.
Test Procedures. These procedures require the use of the MK12 SSDS Test Set. Only diver's
compressed air will be utilized with the test set. A schematic diagram of the test set with a valve lineup matrix is
shown in figure 2-3. Procedures should be performed in the step-by-step sequence listed to avoid errors and
prevent damage. Each test is written as an independent function for the purpose of testing, following PMCS
procedures. During predive testing, transition from one test to another may be simplified by skipping those steps
marked with an asterisk (*). All tests are to be performed daily during predive procedures with the exception of the
relief valve test, and the drysuit leak test. These are permission functions but will be accomplished as often as the
diver supervisor deems necessary. For example, as new suits are brought to the dive station or after repairs have
been effected due to damage incurred during previous dives.
a.
Vacuum Test of the One Way Valve (figure 2-2).
(1)
Remove protective cap and gasket from helmet air supply adapter.
(2)
Connect air whip (1) to helmet air supply adapter (2) and other end to adapter (3).
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