AIRCRAFT ENGINES

The number of spare aircraft engines carried by the activities are determined by their type commanders. These engines are inventoried and managed by the type, model, and serial number. The reporting procedures for the Navy aircraft engine management system (AEMS) are prescribed in NAVAIRINST 13700.15. This instruction covers the requirements for reporting engine/propulsion system/module (EPSM). You should be familiar with the terms and definitions used in AEMS.

Definitions

l The AEMS on-line computer terminal is a computer terminal used for direct input of reports and retrieval of EPSM data.

l The controlling custodians are air commands _and Naval Air Systems Command (NAVAIRSYSCOM) fleet support units exercising administrative control of assignment, employment, and logistic support of certain aircraft and engines as specified by the Chief of Naval Operations (CNO). The controlling custodians are listed in NAVAIRINST 13700.15.

. The designated repair points (DRPs) include the naval aviation depots (NAVAVNDEPOTs), commercial repair facilities, and Army and Air Force facilities designated as NAVAIR fleet support custodians.

l The EPSM reporting custodians are the Navy and Marine Corps activities, units, squadrons, and detachments (including commercial activities) that have physical custody of aircraft EPSMs.

l The engine transaction report (ETR) is submitted on an "as occurring" basis. l The term firewall refers to the section of an aircraft where the engine or propulsion system is installed. l The module is the first sectionalized portion of the propulsion system that is one level below the propulsion system, Some examples of modules are the power section, gear box, and so forth. 

. The term propulsion system serial numbers (PSSNs) is the same as the term engine serial numbers. The Naval Aviation Maintenance Office (NAVMAINTOFF) assigns the PSSN for modular propulsion systems. 

. Quick engine change assembly (QECA) is an engine or propulsion system to which a quick engine change kit (QECK) has been applied. This does not include the propeller for reciprocating engines or turbo prop propulsion systems. The QECA provides for rapid replacement of an inoperable engine in an aircraft.

. A QECK is a kit containing all items required for a quick engine assembly change except for government-furnished equipment, engines, and propellers. l The status codes consist of two digits that describe the status of an aircraft EPSM. Refer to enclosure 2 of NAVAIRINST 13700.15 for a list of status codes. l Star codes consist of two digits that describe the condition or give the reason for transactions such as strikes, transfers, removals, and so forth. The star codes cannot be used without a status code. Refer to enclosure 2 of NAVAIRINST 13700.15 for a list of star codes.

Reporting Responsibilities

The controlling custodians are responsible for ensuring that the reporting activities submit the ETRs in a timely manner. The ETRs must be submitted no later than 2400 hours on the first working day following the date the status on EPSMs are assigned to their custody. The reporting responsibility starts when an EPSM has been received by a controlling custodian. The reporting responsibility stops when the EPSM is transferred to another controlling custodian or when the EPSM is stricken from AEMS.

Supply officers (SUPOs) ashore and commanding officers of fleet and industrial supply centers (FISCs) are responsible for submitting transactions on EPSMs directly to AEMS. This includes EPSMs received in or transferred from their custody.

Engines and propulsion systems removed from aircraft for organizational level maintenance or to facilitate other maintenance will not be reported as long as the same unit will be reinstalled on the same firewall.

When all modules are removed from a propulsion system, the propulsion system is considered disassembled. The propulsion system is placed in status code 90 automatically and requires no ETR submission.

The ETRs can be submitted by using a naval message or the on-line AEMS computer terminal. The ETRs submitted by NAVAIR reporting custodians use the vertical format. The ETRs submitted by COMNAVAIRLANT, COMNAVAIRPAC, and CNATRA use the horizontal format. See the examples of the vertical and horizontal formats in enclosure 2 of NAVAIRINST 13700.15.

SUMMARY

The goal of the supply organization is to provide all the material or services requested by the customer(s). However, to accomplish this goal requires a huge amount of money and storage space. The inventory management in the Navy use the projected customer demand to stock materials. Any items that do not have a projected demand are not stocked so that the available resources (time, money, space, and personnel) can be invested in items that have a high demand. Inventory management includes deciding what items and what quantity must be stocked for each item. Maintaining the items at the level that fully supports the customer's needs is a challenge for any supply organization. A good inventory management includes monitoring of all transactions that affect the quantity of material in stock. In this chapter, we discussed the functions of inventory managers and inventory control points.

We also discussed the different terms and definitions used in Navy inventory management. The definitions for each term will help you understand the word or subject as it is used in the supply procedures.

We discussed your responsibilities as a supervisor in managing the inventories. File maintenance is as important as doing any other functions in inventory management. The files used in manual or automated procedures should always be properly maintained and kept current.

Several management reports must be completed, reviewed, or submitted. You should become familiar with all the management reports. You must know when the reports are produced, how to read them, and when they need to be submitted to higher authority.

Most importantly, we discussed the physical inventory requirement in the Navy. The purpose of the physical inventory is to keep the inventory records accurate. We discussed the different types and the frequency for conducting an inventory and the standard goals that should be met. We discussed the proceduresx for conducting physical inventory ashore and afloat. We discussed the procedures from the preparation for inventory to the physical count reconciliation and processing the adjustments.

We discussed the inventory requirements during the relief of supply officers. The AKs are involved in conducting inventory of general supplies, controlled equipage, and repairable (including MAMs and TBIs).

We discussed the special inventory items such as aircraft engines, material stored in other department's spaces, shelf-life items, and so forth. You should familiarize yourself with the procedures for managing these items.

We covered the procedures for conducting the location audit and the required report of its completion.