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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 appears, 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 symbols 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 margin between
the text and the diagonal lines. Change symbols
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
be identified.
c. Correction of minor inaccuracies, such as spelling,
punctuation, relocation of material, etc., unless
such correction changes the meaning of the instructive
information 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 @
indicates text headings, text contents and illustrations
pertaining to helicopters with an operable BUCS.
Some AH-64A helicopters have T700-GE-701C engines
installed. Those helicopters will have components,
instrumentation, performance parameters, and procedures
different from helicopters with T700-GE-701 engines
installed. The designator symbols Bm and Bmp
indicate 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 Computer (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, m, and m will
indicate material peculiar to that software installation.
1.12 USE OF SHALL, SHOULD, AND MAY.
Within this technical manual, the word shall is used to
indicate 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 acceptable method of accomplishment.
1-2 Change 4
TM 1-1520-238-10
CHAPTER 2
AIRCRAFT AND SYSTEMS DESCRIPTION AND OPERATION
Section I. AIRCRAFT
2.1 GENERAL.
The AH-64A helicopter is a twin engine, tandem seat,
aerial weapons platform.
2.2 AIRCRAFT GENERAL ARRANGEMENT.
Figure 2-2 illustrates the general arrangement including
accessing and some major exterior components.
2.2.1 Fuselage. The fuselage includes a forward, center,
and aft section that employ aluminum alloy semimonocoque
construction. All major weight items (crew,
fuel, and ammunition) are supported by bulkheads,
frames, and a longitudinal support structure. The forward
fuselage contains the copilot/gunner (CPG) station.
There are also provisions for mounting the target
acquisition and designation sight (TADS), pilot night
vision sensor (PNVS), and a 30mm area weapon. The
center section contains the pilot crew station and provides
support for the oleo-damped main landing gear,
main transmission, wings, fuel cells, and ammunition
bay. The aft section includes the vertical stabilizer and
has provisions for mounting the tail landing gear. The
avionics bay and stowage compartments are contained
in the aft section. The tail rotor, drive shafts, gearboxes,
and stabilator are attached to the aft section.
2.2.2 Wings. Left and right wings are attached to the
center fuselage. They are of aluminum cantilever, spar,
and rib construction. Each wing provides two hardpoints
for external stores and hydraulic and electrical
quick disconnects.
2.2.3 Rotors. The helicopter has a fully articulated fourblade
main rotor system equipped with elastomeric leadlag
dampers. The tail rotor is a semi-rigid design and
consists of four blades.
2.2.4 Engines. The helicopter is powered by two horizontally-
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