(6)
Methods of Application of BMS 3-35

(a)  The application hardware and processes for BMS 3-35 are the same as
applying other heavy duty CIC products. Refer to SOPM for additional
CIC application details.

Volume 1

20-60-00

Page 14
OCT 01/02

GENERAL INFORMATION
STANDARD PREVENTIVE MAINTENANCE PROCEDURES

(7) Production Incorporation

(a)  Refer to Airplane Configuration Bulletin 9914598 dtd Jan. 17,00 for
models 737, 747, 757, 767 and ACB 9912596 for the 777 model; and Air-plane Configuration Bulletin dtd Oct. 11,99 for further information
including production airplane models Line Number incorporation.

F. MIL-C-16173 Corrosion Preventive Compound

(1) Although the water-displacing corrosion inhibiting compounds are the

primary corrosion inhibitors used in airplane manufacture, in certain
applications where a more durable surface protection is required, sol-vent-dispersed corrosion inhibiting compounds per MIL-C-16173, Grade 1
are used. These materials are volatile liquids which may be sprayed or
brushed on the surfaces to be treated. The liquid carrier evaporates and
leaves a residue (hard grease in appearance) which will become suffi-ciently dry to permit handling after approximately 4 hours. The Grade 1
compound provides a hard film, but does not have the penetrating or
water displacing qualities of the BMS 3-23 or similar corrosion inhibit-ing compounds. Applications should be limited to areas where a specific
callout of this inhibitor is made.

(2)
Types of MIL-C-16173

(a)
Grade 1 compounds form a hard film like a hard grease. This coating
is dry enough to touch in 4 hours. But it does not penetrate crevices
or displace water.

(b)
Grade 2 compounds form a film which stays soft after it dries. This
coating does not displace water.

(c)  
Grade 3 compounds form a film which stays soft after it dries. This
compound will displace water.

(d)  
Grade 4 compounds form a transparent film. This coating is dry
enough to touch in 4 hours, and is non-tacky after 24 hours.

(e)  
Grade 5 compounds form a film which stays soft after it dries. The
coating can be removed with low pressure steam. This compound will
displace water.

(3)
Grade 1 is the most common type of MIL-C-16173 compound used for corro-sion prevention. Cosmoline 1058 (V73277), referred to as Cosmoline in
this manual, is the MIL-C-16173 Grade 1 material that we use in produc-tion. Refer to the Qualified Products List of MIL-C-16173 for a complete
listing of approved material part numbers and vendors, for all grades.
　
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