Chapter 7. ILLUSTRATED PARTS BREAKDOWN

TM 55-4920-328-13-2

CHAPTER 7

ILLUSTRATED PARTS BREAKDOWN

Section I. GENERAL INFORMATION

7-3. Terms and Symbols.

7-1. Scope.

These terms and symbols are used throughout the

This Illustrated Parts Breakdown lists, illustrates,

Illustrated Parts Breakdown:

and describes the parts for the Modular Engine Test Set

Part No. LTCT 10465-02, manufactured by Avco

Lycoming, Charleston Plant, Charleston, South Carolina.

TERMS AND

DEFINITION

This chapter also provides the Group Assembly Parts

SYMBOLS

Lists and support illustrations for the engine accessories

kits used with the system.

A/R

As required

NHA

Next higher assembly

7-2. Purpose.

No.

Number

--- ---

Denotes end of attaching parts

This

Illustrated

Parts

Breakdown

shows

and continuation of assembly

disassembly

relationship

and

used

when

listing

requisitioning, storing, and identifying parts. It is not to

Degrees Fahrenheit

be taken as the authority for procedures of assembly or

Degrees Centigrade

disassembly. Repairs should be performed using

applicable operation, service, and repair instructions.

Section II. GROUP ASSEMBLY PARTS LIST

7-4. General.

7-6. Parts List Column Data.

Figure and Index Number .

Each major

The Group Assembly Parts List consists of the

assembly illustration is given a figure number. The figure

equipment broken down in disassembly sequence. Parts

number is preceded by the Group Assembly Parts List

listed under major assemblies, subassemblies, details,

section number. Index numbers are provided for detail

and attaching parts are indented in proper disassembly

parts.

relationship. Attaching parts of frequently detached

items are listed immediately after the items they secure.

b. Part Number. The part number column lists the

Contractor's part numbers, Government Standard part

number, or vendor's part numbers. Contractor's part

7-5. Illustrations.

numbers have been arbitrarily assigned and have no

relation to part function or location. When the notation

An illustration is provided for each major assembly,

"COML" is used in the part number column, the part is a

showing the component parts in proper disassembly

common commercial item obtainable from a wide range

order. Phantom views are dashline drawings for parts or

of sources.

locations, either internal or external, which could not be

shown because of illustration projection. The phantom

c. Description Column.

view provides a reference point for the actual location of

parts illustrated or indexed. Solid-line boxes enclose

(1) Indentation. The indentation of the part

detail parts when shape or relative position is not clear.

description relates the part to the previous assembly or

subassembly. A part description under indent 1,

7-1