When installed explosive safety devices have extensions granted, you can update the expiration date by drawing a line through the original date and placing the new expiration date above it. The authority granting the extension (such as the message, date-time group [DTG] and originator, and the IRAC number and manual affected) should be logged in the remarks column.

This record is maintained in a current status by all activities having custody of and/or performing rework on the aircraft in which explosive safety devices are installed. During SDLM, the rework activity transcribes all current information to a new form and discards the old form.

Inventory Record (OPNAV 4790/27A)

The Inventory Record form, shown in figure 6-10, is used to maintain a current inventory of all components or assemblies requiring scheduled removal component (SRC) cards, equipment history record (EHR) cards, assembly service records (ASRs), and module service records (MSRs). Mission configuration items such as bomb racks or searchlights are not to be entered on this record unless they have an SRC card, EHR card, ASR, or MSR.

It is impractical to include a specific list of such components since requirements vary according to the aircraft model. However, all airframe components/assemblies requiring an ASR/EHR/SRC card and items that require an MSR will be recorded in this section. Sound maintenance practices and flight safety considerations dictate the items, other than mandatory, that should be recorded on this form.

Aircraft engines, propellers, auxiliary power units, ejection seats, and other major assemblies requiring an aeronautical equipment service record (AESR) are NOT listed on this or any other form in the aircraft logbook. It is also emphasized that components, assemblies, or modules associated with equipment that require an AESR are to be recorded in the applicable section of

Figure 6-10.-Inventory Record.