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at transfer of command.
(5) SITE ASSESSMENT.
(a) Do not allow entry to any unauthorized personnel
until the site has been adequately surveyed.
(b) Include a gross assessment of composite debris
to determine if there could be airborne particulate at the
damaged debris and down wind.
(6) TRANSFER-OF COMMAND.
(a) Information is needed for the evaluation of composite
damage and exposure concerns post incident.
Document and disclose the following information.
1 Disclose fire conditions of composites – pool fire,
fireball, surface scorched only.
2 Disclose the condition of damaged composites.
Estimate the amount of debris.
3 Disclose if overhaul of composite materials was
needed. Continue to apply extinguishment until debris
and materials reach ambient temperature.
4 If overhaul was performed disclose what was discovered.
5 Disclose plume direction and tilt behavior.
TO 00-105E-9
3-81
(7) COMPOSITE WORK PRACTICE.
(a) Do not bend or flex fibers over a small radius.
Do not run hands along the end of the laminate or fracture
surfaces.
(8) BASICS FOR CUTTING MISHAP-COMPOSITE
MATERIALS.
(a) Ordinary shears will not successfully cut most
composite materials.
(b) A razor or utility knife is fine for cutting a small
number of layers. Use a template to help guide the blade.
To prevent injury, wear a leather or Dupont Kelvar® glove
on the non-cutting hand.
(c) An abrasive cut-off wheel blade will work for most
mishap-composites. The manufacturer for Kelvar® fibers
recommends a carbide tipped blade with an alternating
tooth angle.
(d) Cutting with a circular saw creates resin dust and
particulate, single fibers and fiber bundles ranging in size.
Cutting Kevlar® creates fibrils. Cutting composites with
carbon, boron, glass or quartz will create single fibers
ranging in length and some of the single fibers will be
longitudinally split. Respiratory protection is required.
(e) A high-speed saw will heat the resin and produce
nuisance-level organic vapor. The resin may become
tacky and gum-up the edge of the blade.
(f) Backing the piece with aluminum, wood or cardboard
before cutting will improve the cutting quality (quality
may be necessary for an investigative piece).
(g) Composites are made of layers of material. Consider
the presence of a metal layer within the laminate or
on the backside when cutting completely through the
piece.
(h) Consider tools used for the repair of composites to
cut small sections of composite for investigation purposes.
(i) Damaged composite material can absorb liquids.
Damaged composite may contain fuel residue or other
combustible liquid residue. Cutting composites with a
rescue saw creates a lot of airborne debris and noxious
vapor. The cutting operation should be water cooled when
possible. Foam should blanket the working area if there
is a potentially high risk of sparking residual fuel.
d. INITIAL RESPONSE PROCEDURES.
(1) Military aircraft may contain munitions that are an
explosion hazard. Military aircraft may contain large
amounts of fuel that is a flammable liquid hazard. Military
aircraft brake assemblies are a flammable solid
hazard. Military aircraft contains small amounts of radioactive
material. Until it can be determined what the conditions
are during the initial phase of the response consider
isolating the area at least 80-160 feet in all directions
and allow no unauthorized personnel.
(2) Initial response will establish cordon size for fire
conditions such that cordon lies outside the smoke plume.
All non-authorized, non-essential personnel will remain
outside of the cordon.
(3) Ensure no material is taken out of the area.
(4) Only firefighters wearing turnout (bunker) gear, aluminized
proximity suits and SCBA will be allowed into
the area where an aircraft is on fire. Do not wear rubber
gloves. Burning fuel metal, plastics and composite materials
are toxic.
(5) Activation of the Personal Alert Safety System
(PASS) is necessary when entering a hazardous area.
(6) Class B foam is most effective.
(7) Restrict all unprotected personnel from assembling
downwind of the site.
(8) Advise population in the immediate downwind plume
area of protective measures.
(a) Shut external doors and windows.
(b) Turn off heating ventilation and air conditioning units.
(c) Remain indoors until the plume has traveled downwind
and dispersed.
(9) Low flying aircraft will be restricted from flying within
500 feet above ground level (AGL) and 1000 feet horizontally.
　
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