Special Information - TM-11-5820-549-50-10031

TM 11-5820-549-50-1

decimal point before the next to last digit of the number

reference designation is known. The first column in

to indicate hundredths, and multiplying the decimal

each index is prepared in alpha-numerical sequence.

factor by the parts quantity authorized in the 51-100

The reference numbers (manufacturer's part numbers)

allowance column. Example authorized allowance for

are listed immediately following the last listed Federal

51100 equipments is 40; for 150 equipments multiply 40

stock number in the index of Federal stock numbers.

by 1.50 or 60 parts required.

b. When the Federal stock number is known,

g. 1-Year Allowances Per 100 Equipments/

follow the procedures given in (1), (2), and (3) below.

Contingency Planning Purposes, Column 8.

This

(1) Refer to the index of Federal stock

column indicates opposite the first appearance of each

numbers (sec IV) and locate the Federal stock number.

item the total quantity required for distribution and

The FSN is cross-referenced to the applicable figure

contingency planning purposes. The range of items

and item or reference designation.

indicates total quantities of all authorized items required

(2) Refer to the RPSTL (sec II) and locate the

to provide for adequate support of 100 equipments for

figure number (col 10a) and item or reference number

one year.

(col 10b) as noted in the FSN index.

h. Depot Maintenance Allowance Per 100

(3) If the FSN or manufacturer's part number

Equipments, Column 9. This column indicates opposite

is not listed in the index, refer to columns 2 and 3 of the

the first appearance of each item, the total quantity

RPSTL (sec II) and locate the Federal stock number by

authorized for depot maintenance of 100 equipments.

scrutiny of the numbers listed in columns 2 and 3.

Subsequent appearances of the same item will have the

c. When the reference designation is determined,

letters "REF" in the allowance column. Items authorized

refer to the reference designation index (sec V). The

for use as required but not for initial stockage are

reference designations are listed in alpha-numerical

identified with an asterisk in the allowance column.

order and are cross-referenced to the page number on

i. Illustration, Column 10. This column is divided

which they appear in the repair parts list (sec II). Refer

as follows:

to the page number noted in the index and locate the

(1) Figure Number, Column 10a. Indicates

reference designation (col 10b). If the word "REF"

the figure number of the illustration in which the item is

appears in the allowance column for the repair part, note

shown.

the Federal stock number (col 2) or manufacturer's part

(2) Item Number, Column 10b. Indicates the

number (col 3). Refer to the FSN index and note the

callout number used to reference the item in the

reference designation for that FSN or part number.

illustration.

Refer to the reference designation index and note the

page number given for the reference designation. Refer

to the page noted in the RPSTL (sec II) and locate the

B-4. Special Information

reference designation incolumn 10b of the repair parts

Repair parts mortality is computed from failure rates

list.

derived from experience factors with the individual parts

in a variety of equipments. Variations in the specific

application and periods of use of electronics equipment,

B-6. Federal Supply Code for Manufacturer's Name

the fragility of electronic piece parts, plus intangible

material and quality factors intrinsic to the manufacture

Code

Manufacturer's Name

of electronic parts, do not permit mortality to be based

00639 ................. Bevin and Wilcox Line Co.

on hours of end-item use. However, long periods of

16758 ................. Delco Radio Div. of General Motors

continuous use under adverse conditions are likely to

Corp.

increase repair parts mortality.

80063 ................. Army Electronics Command

81349 ................. Military Specifications

B-5. Location of Repair Parts

96906 ................. Military Standards

a. This manual contains two cross-reference

indexes (sec IV and V) to be used to locate a repair part

when either the Federal stock number, reference

number (manufacturer's part number), or

B-3