SECTION II. REMOVING A CMB

TB 1-1520-238-20-140

SECTION II. REMOVING A CMB

2. REMOVING A CMB

2.1.

Description: This task covers removing a CMB from an assembly or subassembly.

2.2.

General Information: A CMB is removed in one of two ways. Either it must be forcibly removed from

a permanently affixed position on the component, or the identification tag it is taped to must be cut off

from the component. Either way, the CMB must be read and removed prior to starting repairs to the

component.

2.3.

Initial Setup

Materials:

Tools:

Dry Ice (Item 1, Table 2)

Phenolic Wedge

Corrosion Preventive Compound (CPC) (Item 10, Table 2)

WARNING

Dry ice is solid carbon dioxide that has a temperature below -112° F (-80° C).

Contact with skin will cause serious low temperature burns. Temperature

resistant gloves/apron required. Carbon dioxide displaces oxygen, which

can cause asphyxiation. Use only in a well ventilated area.

CAUTION

When removing a CMB, care should be taken not to damage the surface of

the component.

NOTE

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.

A CMB either permanently affixed to the component or attached by an

identification tag must be read prior to removing. Refer to Section I of this

document on downloading the CMB.

All CMB tags must be removed from a component prior to component

assembly or installation.