MIL-STD-38784A
a. Sheets shall be identiied with the title "DIFFERENCE DATA SHEET" centered at the top
of each page.
b. The irst page of each sheet (for a speciic model) shall have a heading in uppercase type
consisting of the nomenclature and the model, type/type designator, or part number of the item
covered. The heading shall be accentuated by having lines drawn above and below it and extending
across the width of the page. The heading shall be followed by a statement to this effect:
THE INSTRUCTIONS CONTAINED IN THE PRECEDING CHAPTERS OF THIS
TECHNICAL MANUAL ARE APPLICABLE TO THIS MODEL EXCEPT FOR THE
DIFFERENCES CITED IN THIS DIFFERENCE DATA SHEET.
c. Sheets for each model shall start on a right-hand page. Page numbers, igure numbers and
table numbers shall run consecutively throughout the sheets. Sheets shall be added as required.
Paragraphs need not be numbered, but if numbering is used, single Arabic numerals, beginning
with "1" for each added model may be used.
d. Sheets shall consist of one or two pages and shall not exceed four pages.
4.7.2.3.2 Arrangement. Difference Data Sheets shall briely specify how operation and maintenance
procedures for that coniguration differ from the procedures for the representative coniguration contained in
the preceding sections or chapters. Sheets shall contain the following information:
a. An external view of the model if the view is signiicantly different from the one previously shown.
b. A table of tabulated data if the information is signiicantly different from that previously presented.
c. Illustrations which are essential for clarifying differences. Illustrations in preceding sections or
chapters shall not be duplicated, but may be referenced if necessary. Reference shall not be made
to illustrations on other Difference Data Sheets.
d. Brief coverage of subjects speciied for the original model. The title of each of the preceding
chapters shall be listed in the same order of arrangement as the manual. Short, concise statements
shall be used to convey the similarity or explain the difference in procedures.
(F) Electronic presentation: References to previous igures, graphics, etc., shall be linked to data
to which they apply.
4.7.2.4 Transmittal cover sheets. Print presentation: When speciied (see 6.2.bm.), classiied or unclassiied
changed pages, supplements or TCTOs to a classiied manual shall be covered with an appropriate
transmittal cover sheet (see igure 30). Each transmittal cover sheet shall be prepared and submitted in
the same form as the changed pages.
4.7.2.5 Changes to illustrations. When changes are made to illustrations, the original artwork shall be used
unless the preparation of new artwork is less expensive.
4.7.2.5.1 Illustration changes. Print presentation: Sheets added to a set of multisheet illustrations which fall
between existing sheets shall be assigned the preceding number plus a decimal number. For example: if a
sheet is added between sheets 2 and 3, the added sheet becomes 2.1. If possible, the new sheet shall be
added after the last sheet and be assigned the next consecutive number. If a callout (see 6.3.3) is deleted from
an illustration, the word "(Deleted)" in parentheses shall be placed after the appropriate number in the legend.
(M) Alpha characters shall be used, e.g., sheet 2A of 3.
4.7.2.5.2 Index number changes. Where a change to an illustration adds index numbers between
existing numbers, the added numbers shall be the same as the preceding index number with an added
decimal number, e.g. 22.1, 22.2, etc.
4.7.2.6 Deleted paragraphs, steps, illustrations, tables. Where a change deletes a paragraph, step/substep,
illustration, or table without substituting another, the space formerly occupied by the paragraph, step/substep,
illustration, or table can be used for other instructions, allowing for suficient space to provide ¼-inch
above and below a sentence such as "Paragraph 4-2 deleted." The table of contents, LOI, LOT and
index shall be changed as necessary.
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