umn. Example, authorized allowance for 51-100
b. When the Federal stock number is known,
equipments is 40; for 150 equipments multiply
follow the procedures given in (1), (2) and (3)
40 by 1.50 or 60 parta required.
(1) Refer to the index of Federal stock num-
(4) Subsequent changes to allowances will
bers (sec. V) and locate the Federal stock num-
be limited as follows: No change in the range
ber. The FSN is cross-referenced to the appli-
of items is authorized. If additional items are
cable figure and item or reference designation.
considered necessary, recommendation should be
(2) Refer to the RPSTL (sec. III) and locate
forwarded to Commanding General, U.S. Army
the figure number (col. 7a), and item or reference
Electronics Command, ATTN: AMSEL-ME-
number (col. 7b), as noted in the FSN index.
NMP-EM, Fort Monmouth, N.J. 07703, for ex-
(3) If the FSN or manufacturer's part num-
ception or revision to the allowance list. Revisions
ber is not listed in the index, refer to columns 2
to the range of items authorized will be made
and 3 of the RPSTL (sec. III) and locate the
by the USA ECOM National Maintenance Point
Federal stock number or part number by scrutiny
based upon engineering experience, demand data,
of the numbers listed in columns 2 and 3.
or TAERS information.
c. When the reference designation is deter-
g. Illustration, Column 7. This column is di-
mined, refer to the reference designation index
vided as follows:
(sec. VI). The reference designations are listed
(1) Figure number, column 7a. Indicates
in alphanumerical order and are cross-referenced
the figure number of the illustration in which
to the page number on which they appear in the
the item is shown.
repair parts list (sec. III ). Refer to the page
(2) Item number, column 7b. Indicates the
number noted in the index and locate the refer-
callout number used to reference the item in the
ence designation (col. 7b). If the word "REF"
appears in the allowance column for the repair
part, note the Federal stock number (col. 2) or
D-4. Special Information
manufacturer's part number (col. 3). Refer to
the FSN index and note the reference designation
Repair parts mortality is computed from failure
for that FSN or part number. Refer to the ref-
rates derived from experience factors with the
erence designation index and note the page num-
individual parts in a variety of equipments. Vari-
ber given for the reference designation. Refer
ations in the specific application and periods of
to the page noted in the RPSTL (sec. III) and
use of electronics equipment, the fragility of elec-
locate the reference designation in column 7b
tronic piece parts, plus intangible material and
of the repair parts list.
quality factors intrinsic to the manufacture of
electronic parts, do not permit mortality to be
D-6. Federal Supply Code for Manufacturers
based on hours of end item use. However, long
periods of continuous use under adverse condi-
05301 ---------Engelhardrd Industries, Inc.
tions are likely to increase repair parts mortality.
08806 ------General Electric Co., Miniature
D-5. Location of Repair Parts
12143 ----- Bendix Corp, Electrical Components
a. This appendix contains two cross-reference
indexes (secs. V and VI) to be used to locate
12705 ------ Electro-Optical Systems, Inc.
a repair part when either the Federal stock num-
15291 ------Adjustable Bushing Corp.
ber, reference number (manufacturer's part num-
25072 ------Western Airmotive, Inc.
ber), or reference designation is known. The
75915 ------Littlefuse, Inc.
first column in each index is prepared in alpha-
80058 ------ Joint Electronic Type Designation
numerical sequence. The reference numbers
(manufacturer's part numbers) are listed imme-
88044-------Aeronautical Standards Group
diately following the last listed Federal stock
Dept of Navy and Air Force
number in the index of Federal stock numbers.