The amount of records, cards, and forms
that must be inserted into the aircraft log-
book binder often requires the use of more
than one binder. When more than one binder
is used, the binders are marked Volume I,
Volume II, etc.
NOTE: The aircraft logbook is in loose-leaf
form; therefore, the model and serial number
should be inserted on each page (in the spaces
provided). This action ensures ready identification
when pages are removed for entries or for any
An aircraft logbook is made up of forms
for recording essential data. Examples of
these forms and a brief description of each
form are contained in the following paragraphs.
Refer to the latest edition of OPNAVINST
4790.2 for logbook construction and form
Aircraft Non-Aging Record
The Aircraft Non-Aging Record (fig. 6-1) is
maintained as a part of the aircraft logbook to
provide a permanent record of time accumulated
in nonaging situations. To understand the purpose
and use of this record, you must understand what
is meant by aircraft aging and nonaging.
When an aircraft is purchased by the Navy,
the Navy plans to operate the aircraft for a
specified number of months, called operational
service months (OPSERMOS). The total number
of OPSERMOS expected before the aircraft is
Figure 6-1.-Aircraft Non-aging Record.