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Medical Education Division |
Operational Medicine 2001
Field Medical Service School
Student Handbook
M40-GAS
MASK
TERMINAL LEARNING OBJECTIVES. 1.
Given a simulated combat environment (day and night), individual combat
equipment, utilize the M40 Field Protective Mask (FPM) per the reference.
(FMST.02.12) ENABLING LEARNING OBJECTIVES. 1.
Without the aid of reference materials, given a list, identify the
components and accessories of the M40 Field Protective Mask, per student
handout. (FMST.02.12a) 2.
Without the aid of reference material, given an M40 Field Protective
Mask, and a simulated chemical environment, don and clear the mask, per student
handout. (FMST.02.12b) 3.
Without the aid of reference materials, given a contaminated M40 Field
Protective Mask, clean the mask, per student handout.
(FMST.02.12c) 4.
When exposed to irritant gas in a chamber or simulated combat
environment, and utilizing a M40 Field Protective Mask, clear the mask
effectively, per instruction. (FMST.02.12d) 5.
While a student at Field Medical Service School, complete CS chamber
training, per the student handout. (FMST.02.12e) OUTLINE A.
IDENTIFY THE M40 FIELD PROTECTIVE MASK.
The M40 FPM is an individual protective device used to protect the
wearer’s face, eyes, and lungs against field concentrations of chemical and
biological (CB) agents, toxins and radioactive fallout particles.
B.
CHARACTERISTICS
OF THE M40. 1.
The M40 FPM will not protect the wearer against industrial gases (i.e.
ammonia, carbon monoxide). It is
not effective in confined spaces, where the oxygen content of the air is too
low. 2.
The M40 FPM allows the wearer the capability of drinking water while
worn. 3.
The M40 FPM comes in three sizes small, medium, and large. The size mark is located on the top left portion of the mask. C.
INSPECTION
AND MAINTENANCE OF THE M40 FPM. Inspection
and maintenance of the M40 FPM is the individual’s responsibility.
A semiannual inspection is mandatory.
The individual will inspect: 1.
Face-piece
Assembly.
Visually inspect outside and inside for dirt, mud, or oily substances.
Check for holes, tears, splits, soft or sticky spots. 2.
Head
Harness.
Check for dirt. Check straps for cuts, tears, missing parts or fraying.
Check for loss of elasticity. 3.
Eye-lenses,
Eye-rings and Out-serts. Remove out-serts
from face-piece and check eye-lenses for cracks, cuts, scratches, or
discoloration that will effect vision. Check
eyerings for distortion or corrosion. Check
both sets of out-serts for cracks, chips or discoloration that effects your
vision. 4.
Hood.
Examine the hood for cuts, holes, or tears.
Check straps for frays, tears, or missing hardware.
Check zipper for torn, broken, or inoperative parts. 5.
Canister.
Check canister, especially around seams, for cracks, dents, or holes.
Check air intake to make sure it is not clogged with dirt. Check for damaged threads on the canister. 6.
Outlet
Valve Disk and Outlet Valve Cover. Check to see
if outlet valve disk is present and is not curled or distorted.
Rotate outlet valve disc to make sure it is not sticking.
Check outlet valve cover for cuts, tears, or holes.
Remove any dirt or moisture. 7.
Internal/External
Drink Tubes. Check to
insure cracks or cuts are present. Insure
tubes are not clogged by connecting M1 canteen cap and blowing air through
system. 8.
Airflow
Deflector.
Check that airflow deflector is securely mounted inside face-piece.
Check mounting holes for cuts or tears. 9.
Inlet
Valve.
Check inlet valve to insure it is properly mounted on post.
Check inlet valves for cuts, holes, or tears.
Insure it is not stuck to the valve body. 10.
Nose-cup
Assembly.
Check nose-cup for cracks or holes.
Check that the nose-cup is not pulled away from the back of front
voice-meter housing. Check that the
nose-cup valve disks are present. Rotate
disks to make sure they are not stuck, curled, or torn. 11.
Voice-meter.
Check both voice-meters for bends, cracks, or punctures.
Make sure the beads in the center of each voice-meter are facing outward. 12.
Carrier.
Inspect carrier for torn, damaged, or missing hardware.
Check for mildew, solvents, or abrasive materials that may harm the
face-piece. 13.
Waterproof
Bag.
Check for cracks, tears, holes, or brittleness.
Check that rubber bands are not sticky, broken, or brittle. 14.
Optical
Inserts
(if issued). Inspect for broken
lenses or frame. D.
COMPONENTS
AND ACCESSORIES OF THE M40 FPM. 1.
Components of the M40 FPM are:
2.
Accessories are: a)
Optical Inserts (issued by unit supply) b)
M8 paper (Used to identify liquid, nerve, and blister agents). c)
M1 Canteen Cap (issued by unit supply). d)
M258A1/M291 Decontamination Kit. e)
Optical Inserts. Spectacles
for FPM will be issued if bifocal correction is required to satisfactorily
perform assigned duties, or if unaided binocular visual acuity is less than
20/70 or less than 20/40 in the case of military vehicle operations and less
than 20/20 for flight personnel. E.
DONNING
AND CLEARING M40 FPM. 1.
Stop breathing and close your eyes, open carrier with your left hand and
hold open. With your right hand
grab the face-piece and remove from carrier.
Place your chin in chin-pocket of the face-piece.
Cover the opening at the bottom of outlet valve with the palm of one
hand. Breathe out hard so that the
air escapes around the edges of the face-piece.
Tighten straps and adjust. F.
FILTER ELEMENTS FOR THE M40 FPM. 1.
There is a standard type of canister with NATO standard threads.
It can be screwed on either the left or right side of the face-piece
assembly; based on the individuals
shooting style (left-handed or right-handed).
In an emergency, this filter can be changed while wearing the mask. G.
USING
THE DRINKING SYSTEM.
1.
Edge of the face-piece comes up to the forehead but not into the hairline
and within 1 inch (2.5 cm) of the ear. 2.
Temple straps and cheek straps do not cut into the ears. 3.
Eye pupils are centered in eye-lenses. 4.
Face-piece does not press flesh so tightly that eyes are partly closed. 5.
Bottom of face-piece does not cut into the throat. 6.
Skin in front of the ears is not wrinkled. 7.
Nose-cup does not obscure vision or cut into nose. 8.
If the face-piece is hard to fit, try another size (there are three
sizes: small, medium, and large). I.
WASH THE M40 FPM. 1.
Wash mask anytime it needs cleaning.
A white or rust colored waxy film is not dirt, it is from the
preservatives built in the rubber. It
will bleed off as long as the face-piece is good. 2.
Required materials; soft cloths, soft bristle brushes, warm soapy water,
and warm clear water or M258A1 kit. 3.
Remove voice-meter, outlet valve cover and disk, inlet valve assemblies,
and eye lens out-serts. 4.
Do not remove filter elements. Insure
pouch flaps are buttoned. Keep
water away from inlet valve connectors. 5.
Dip clean, soft cloth in warm soapy water and wring it out.
Wash mask inside and out. Wash
voice-meter, outlet valve cover, and inlet valve assemblies.
Be careful with rubber disks. 6.
Rinse cloth in clear, warm water and wring it out.
Wipe all washed parts. 7.
Dry all parts and mask with dry, soft cloth.
Use brush in hard to get areas. 8.
Replace parts taken off. Make
sure rubber disks are snug and flat. Clean
lenses using plastic polish or warm, soapy water. REFERENCES: Medical
Considerations of NBC Warfare NBC
Defense, FMFM 11-1 NBC
Defense, FM 21-40 NBC
Decontamination, FMFM 11-10 Field Medical Service School
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