TB 1--1520--238--20--100
NOTE
Proper cleaning of the tubing is necessary to determine
the extent of corrosion damage, and to determine the
appropriate corrective action.
(1) Remove built--up corrosion from tube with non--metallic abrasive mats (A--A--5804) grade "A"
type 1 or finer. Solvent clean with acetone, MIL--STD--1218, or equivalent. Corroded areas inside the tube
that are not accessible require tube replacement IAW paragraph 9.a.
(2) Visually inspect the cleaned area using a 5X (5 power or equivalent) magnifying glass (GG--
M--95). Ensure all corrosion is removed.
(3) After all corrosion has been removed, inspect for allowable damage. Replace the tube IAW
paragraph 9.a if the repair exceeds 10 percent (.003 inch) of the tube wall thickness. If damage is within allow-
able limits, and all corrosion has been removed, rework as needed IAW paragraph 9.b.
10. Supply/Parts and Disposition .
a. Parts Required. Items cited in paragraph 7 may be required to replace defective items.
b. Requisitioning Instructions. Requisition replacement parts through normal supply channels using
normal supply procedures. All requisitions shall use project code (CC 57--59) "XF6" (X--Ray Fox--trot Six)
per this TB.
NOTE
Project code "XF6" is required to track and establish a data base
of stock fund expenditures incurred by the field as a result of SOF
actions.
c.
Bulk and Consumable Materials.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Primer, epoxy
MIL--P--23377, type 1, class "C"
8010--01--314--6077
Polymide
MIL--P--85582, type 1, class "C2" 8010--01--292--8894
Acetone or equivalent
MIL--STD--1218
6810--00--264--8955
Treatment, chemical corrosion
MIL--C--10578, type 1
8030--00--145--0084
Abrasive mats, non--metallic
A--A--5804, grade "A", type 1 or
N/A
finer
Nut, tube, coupling
MS21921D4
4730--00--555--8203
Sleeve
MS21922--4
4730--00--289--8619
Tube, metallic
WWW--T--700/4
4710--00--683--9034
d. Disposition-- N/A.
e. Disposition of Hazardous Material. IAW Environmental Protection Agency directives as implement-
ed by your servicing environmental coordinator (AR 200--1).
11. Special Tools, Jigs and Fixtures Required.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Gloves, treatment
MIL--G--36592
6515--01--150--2977
Magnifying glass
GG--M--95
6650--00--958--7408
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