TM 5-4220-231-14&P
5-8.
Composite
Flask.
See
Figure 5-7.
This task covers:
Repair
INITIAL SETUP
Tools
Equipment
Conditions
Micrometer,
Vertical
Remove
composite
flask (Para.
4-20a
1-5)
Materials/Parts
Reference
Flask,
Composite
13229E4604
Para.
3-13
Maintensnce
and
Reentry
Control
Procedures
Epoxy
Coating
Kit (Item 21, Appendix
D)
a. Types
of Damage
and Acceptance
Criteria
(1)
Abrasions.
Minor abrasions,
such
as scuffs
of less
than
0.005
in. deep
are
repairable.
Abrasions
with isolated
groups
of fibers
exposed
as flat spots
with a depth
greater
than
0.005
in., but less than
0.040
in. are
repairable
ifthe cylinder
is again
coated
with resin
to avoid
water
entrapment.
Cylinder
with greater
abra-
sion damage
should
be returned
to the
manufacturer
for determination
of serviceability.
(2)Cuts.
Cuts or scratches
less than 0.005
in. deep
are repairable
regardless
of length,
number
or direction.
Cuts
greater
than 0.005
in. and
up to 0.040
in. deep,
with a maximum
of 2 in. length
transverse
to the
fiber
direction
are repairable.
Cylinders
with greater
cut damage
should
be returned
to the manufacturer
for
determination
of serviceability.
(3) Impact
Damage.
Composite
cylinders
are
very resistant
to this type of damage
and
a significant
impact
is required
to
cause
damage
sufficient
to warrant
cylinder
condemnation.
Damage
is severe
it evidence
of fiber cut-
ting, delamination,
and
possible
structural
damage
is apparent.
Refer to 5-8.a.(1)
and
(2) for Damage
Acceptance
Criteria.
(4) Structural
Damage.
Structural
damage
includes
cylinders
with visual
evidence
of a change
in the original
configuration
and
cylinders
with such
damage
should
be returned
to manufacturer
for determination
of serviceability.
A
cylinder
must
be condemned
if there
is any
evidence
of bulges,
a cocked
end fitting, coricave
area
on
the dome
or on the cylinder
section,
or, if by visual
inspection
of the cylinder
interior,
there
is evidence
of damage
involving
deformation
of the
liner.
Change
1
5-31
