Volume 1
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GENERAL INFORMATION
STANDARD PREVENTIVE MAINTENANCE PROCEDURES
(8) Removal BMS 3-26
(a) You can use the same solvents for BMS 3-26 that we list for BMS 3-23
water displacing compound (Ref par. 4.B.(8)). Also, you can use
these solvents:
Use on
BMS 3-26 Type
I
II
Material
Varsol No. 1
Shell-Sol 345
Skellysolve-S
Chevron 325
Union No. 5 Thinner
S-76 Cleaning Sol-vent
Klenzine
Sikkens 96.126
Skellysolve V
Standard 265 Thin-
ner
Sikkens 96.131
Vendor
Exxon Company, USA, V29700
Shell Petrochemical, V86961
Getty Oil Co., V8H761
Chevron USA, Inc., V4H372
Union Oil Company of California,
V79003 or V8F610
Union Oil Company of California,
V79003 or V8F610
Atlantic Richfield Company,
V1E874
Sikkens, VH0951
Getty Oil Co., V8H761
Chevron USA, Inc., V4H372
Sikkens, VH0951
(9) Exterior Discoloration by BMS 3-26
(a) Liberal use of these corrosion-inhibiting compounds on the internal
surface of the airplane can lead to discoloration of the external
surface. Because of the excellent penetrant properties of these
materials, a "bleed through" can be expected at fasteners that are
not fluid-tight. This is normal and does not indicate a requirement
to replace or redrive the fasteners. The tiny passages should seal
themselves within a short time.
Volume 1
20-60-00
Page 10
OCT 01/02
GENERAL INFORMATION
STANDARD PREVENTIVE MAINTENANCE PROCEDURES
(b) You can remove these compounds from the exterior surface with one of
the solvents listed. These solvents will not stain or damage the
exterior of the airplane or decorative finish. But a noticeable dif-
ference in oxidation of the exterior surfaces can occur between
those areas, which have been coated with the compound, and areas
that have not. If you see this difference in color, you can buff it
out with the materials listed in Chapter 20 of the Maintenance Man-
ual.
D. BMS 3-29 Corrosion Inhibiting Compound
(1) General
(a)
This is an organic compound of nonvolatile base materials in sol-vents to make a fluid. It does not contain silicones. This compound
can be dipped, brushed or sprayed. After it dries, it makes a trans-parent but visible protective layer. Coated surfaces become dry to
the touch after 24 hours. The layer is not easily rubbed or worn off,
but must be applied again if the surface is washed frequently.
(b)
BMS 3-29 specifies an advanced corrosion-inhibiting compound that
has the penetration characteristics of BMS 3-23 and the durability
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