MULTIPLE BINDERS

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 other reason.

FORMS

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 sequence procedures.

Aircraft Non-Aging Record (OPNAV 4790/18)

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.