INSTALLING A CMB cont'd

TB 1-1520-238-20-140

The ambient conditions during installation can affect the cure times for the

adhesive. Do not install CMBs at ambient temperatures below 50°F, or the

adhesive will not properly cure.

Do not apply paint or corrosion preventive compound over the top of the

CMB. Doing so can prevent proper CMB read/write operation. If paint or

CPC does get on the CMB, use acetone to clean the CMB, and then try

reading the CMB. If the CMB cannot be read in its entirety, remove and

install a new CMB in its place.

Care should be taken not to damage the metal surface of the component

when preparing a component for CMB installation.

NOTE

Procure all necessary tools and materials from supply before starting the

CMB installation (See Figure 1 and Table 2).

The new CMB should be installed only after all major repairs to the

component have been completed and painting is completed.

Refer to Figures 3 thru 211 for proper placement of CMBs on components.

If a component is being cannibalized, each component that requires a CMB

(See Table 1) must have its own CMB tag tied to it with all applicable

maintenance data uploaded to the CMB for that component prior to

shipping.

3.4 Installing a CMB on a component with any coated surface (paint,

primer, clear coating, Pro-seal, etc.).

Reference paragraph 3.5 for

installation of CMBs to bare metal surfaces.

CAUTION

Care should be taken not to expose any bare metal.

NOTE

Use of power tools is not permitted unless approved by RDECOM Aviation

Engineering Directorate (AED).

The adhesive must form

complete

bead

around

the

outside

circumference of the CMB.