installed. It is maintained in the same way in the AESR as it is in the aircraft logbook. (See fig. 6-9, chapter 6.)

Inventory Record (OPNAV 4790/27A)

The Inventory Record Form is common to both the aircraft logbook and the AESR (fig. 6-10, chapter 6). It is used to maintain a current inventory of all equipment or components requiring an SRC, EHR, ASR, or MSR. Sound maintenance practices and flight safety considerations dictate those items, other than mandatory, that should be recorded on this form. Components, assemblies, or modules properly associated with equipment requiring an AESR are recorded in this section and NOT with airframe components in the aircraft logbook.

At the time of repair by the IMA or rework by the depot activity, all old Inventory Record Forms are removed and new forms inserted in the AESR. All pertinent data for those items that have been installed by the equipment custodian during the previous service period and that are not scheduled for removal during repair or rework are transcribed to the new form(s) to maintain proper maintenance continuity. SRCs, EHRs, ASRs, or MSRs installed during repair or rework are also listed on this new form.

Scheduled Removal Component (SRC) Card (OPNAV 4790/28A)

Maintenance history, installation, and usage data is recorded on the SRC card. (See chapter 6, figs. 6-14 and 6-15). It is maintained as part of the AESR as long as the component is installed. When the component is removed from the equipment, the card accompanies the component. It is very important that maintenance history continuity is maintained. The same procedures used to maintain or adjust the SRC card in the aircraft logbook should be used to maintain or adjust the SRC card in the AESR.

Equipment History Record (EHR) Card (OPNAV 4790/113)

The EHR provides a method for monitoring specific maintenance data on designated

Figure 7-3. - Module Service Record (page 1).