1.10 EXPLANATION OF CHANGE SYMBOLS.
Changes to the text and tables, including new material on
added pages, shall be identified by a vertical bar in the
outer margin of the column of text in which the change ap-
pears, extending close to the entire area of the material
affected. Change symbols for single column text shall be
placed in the margin opposite the binding. Change sym-
bols for double column text shall be placed in the margin
adjacent to the binding for the columns of text nearest the
binding. The change symbols shall be placed in the outer
margin opposite the binding for the column of text farthest
from the binding. Pages with emergency markings, which
consist of black diagonal lines around three edges, shall
have the vertical bar or change symbol placed in the mar-
gin between the text and the diagonal lines. Change sym-
bols shall indicate the current changes only. A miniature
pointing hand symbol shall be used to denote a change to
an illustration. However, a vertical line in the outer margin
(opposite the binding) rather than miniature pointing
hands, shall be utilized when there have been extensive
changes made to an illustration. Change symbols shall
not be used to indicate changes in the following:
a. Introductory material.
b. Indexes and tabular data where the change cannot
c. Correction of minor inaccuracies, such as spelling,
punctuation, relocation of material, etc., unless such
correction changes the meaning of the instructive infor-
mation and procedures.
1.11 SERIES AND EFFECTIVITY CODES
All AH-64A helicopters have BUCS equipment installed.
In most helicopters, the system is deactivated; in some it
is operable. The designator symbol
headings, text contents and illustrations pertaining to heli-
copters with an operable BUCS.
Some AH-64A helicopters have T700-GE-701C engines
installed. Those helicopters will have components, instru-
mentation, performance parameters, and procedures dif-
ferent from helicopters with T700-GE-701 engines
installed. The designator symbols
material pertaining to those specific engines.
Some AH-64A helicopters have the 7-319200005-11 Fire
Control Computer (FCC) with 51 software installed (EGI
Mod); others have the 7-319200005-9A Fire Control Com-
puter (FCC) with 49A software installed; others yet have
the 7-319200005-5 FCC with 45 software. Because of
differences in operation, displays, etc. designator symbols
will indicate material peculiar to that
1.12 USE OF SHALL, SHOULD, AND MAY.
Within this technical manual, the word shall is used to in-
dicate a mandatory requirement. The word should is
used to indicate non-mandatory but preferred method of
accomplishment. The word may is used to indicate an ac-
ceptable method of accomplishment.
1.13 PLACARD ITEMS
All Placard Items (switches, controls, etc.) are shown
throughout this manual in BOLD FACE capital letters.