ANNUAL INSPECTION AND MAINTENANCE CHECKLIST (continued)
STEPS
PROCEDURE
INITIALS
ORAL-NASAL MASK
NOTE:
Refer to the oral-nasal mask section of the Operations and Maintenance
Manual for guidance.
ORAL-NASAL
• 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:
T
he oral-nasal mask has a long service
life and is not normally replaced annually.
INHALATION VALVE
HOUSING
• Remove and visually inspect for damage. All
spokes of the "wagon wheel" must be present.
• If necessary, replace the inhalation valve housing.
INHALATION VALVE
(one way valve)
• Remove and visually inspect for damage and
deterioration.
• Replace the inhalation valve annually.
COMMUNICATIONS
NOTE:
Refer to the communications section of the Operations and Maintenance
Manual for guidance.
SPEAKER AND
MICROPHONE
• 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.
COMMUNICATIONS
POSTS
• 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.
COMMUNICATIONS
TERMINAL BLOCK
• Visually inspect the internal 4-wire comms terminal
block for damage.
• Replace as required.
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