TM 1-1510-224-10
a.
Introductory material.
b.
Indexes and tabular data where the
change cannot be identified.
c.
Blank space resulting from the deletion of
text, an illustration or a table.
d.
Correction of minor inaccuracies, such as
spelling, punctuation, relocation of material, etc., unless
correction
changes
the
meaning
of
instructive
information and procedures.
1-11. SERIES AND EFFECTIVITY CODES.
Designator symbols such as P (RC-12P) and Q
(RC-12Q) are used in conjunction with-text contents, text
headings and illustration titles to show limited effectivity
of the material. If applicable, a designator symbol may
follow a text heading or illustration title to indicate proper
effectivity, unless the material applies to all series and
configurations within the manual. If the material applies
to all series and configurations, no designator symbols
will be used. Note, however, that Chapter 7 P applies
only to the RC-12P, while Chapter 7A Q applies only to
the RC-12Q. Designator symbols will not used in these
chapters other than within the chapter title. Designator
symbols will precede procedural steps in Chapters 8 and
9, if applicable.
1-12 AIRCRAFT DESIGNATION SYSTEM.
The designation system prescribed by AR 70-50 is
used in aircraft designations as follows:
EXAMPLE RC-12P
R - Modified mission symbol (Reconnaissance)
C - Basic mission and type symbol (Cargo)
12 - Design number
P - Series symbol
1-13. USE OF WORDS 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 a nonmandatory but
preferred method of accomplishment. The word 'may" is
used
to
indicate
an
acceptable
method
of
accomplishment.
1-14. PLACARD ITEMS.
Where applicable, placarded items (switches,
controls, etc.) are shown, throughout this manual, in
boldface capital letters.
1-2
