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ANNUAL INSPECTION AND MAINTENANCE CHECKLIST (continued)
STEPS
NOTE: Refer to the oral-nasal mask section of the Operations and Maintenance
Manual for guidance.
ORAL-NASAL
INHALATION VALVE
HOUSING
INHALATION VALVE
(one way valve)
NOTE: Refer to the communications section of the Operations and Maintenance
Manual for guidance.
SPEAKER AND
MICROPHONE
COMMUNICATIONS
POSTS
COMMUNICATIONS
TERMINAL BLOCK
PROCEDURE
ORAL-NASAL MASK
•
Remove oral-nasal mask (microphone must be
remove prior to oral-nasal mask) and check for
damage and/or deterioration.
•
The oral-nasal mask may be washed as required.
•
If necessary, replace the oral-nasal mask.
NOTE: The oral-nasal mask has a long service
life and is not normally replaced annually.
•
Remove and visually inspect for damage. All
spokes of the "wagon wheel" must be present.
•
If necessary, replace the inhalation valve housing.
•
Remove and visually inspect for damage and
deterioration.
•
Replace the inhalation valve annually.
COMMUNICATIONS
•
Remove and visually inspect the speakers,
microphone, cables and connections. Ensure
that contact surfaces are cleaned thoroughly.
•
During reassembly check the comms system. If
sound quality is poor, replace speakers and/or
microphone.
•
Visually inspect for insulation cracks or damage
and re-tighten each nut from inside. Replace
posts as required.
NOTE: There is no requirement to remove
the posts unless damaged.
•
Visually inspect the internal 4-wire comms terminal
block for damage.
•
Replace as required.
55
INITIALS
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