transaction reports. These reports were forwarded to the Bureau of Aeronautics (BUAER) by fleet and shore activities as changes occurred.
After World War II, with the reduction in civilian personnel ceilings, it became necessary to reduce the manual workload required in engine accounting. This was accomplished by requiring fleet and shore activities to submit monthly reports to the major fleet aircraft commanders, where the reports were summarized and sent to BUAER. Only spare engines were reported, and all data was processed manually. To overcome the deficiencies of this system, a new system was devised in 1955 that used punch cards and electric accounting machines. This system required that all engines be reported by serial number at the end of each month, indicating the various changes in status that had occurred for each engine during the month. On 1 July 1961, this system was converted to daily transaction reporting and automatic data processing to provide more timely aircraft engine management data and reduce the workload at reporting activities.
Various Navy-wide aircraft engine management reports are developed by the Naval Air Systems Command (NAVAIRSYSCOM) on automatic data processing equipment from a master aircraft engine record file maintained on magnetic tape. This master file, which contains the status, custody, and performance history of each serially numbered aircraft engine in the active Navy engine inventory, is updated daily by transaction reports forwarded by controlling custodians and Naval Air Systems Command Fleet Support (NAVAIRSYSCOMFS) custodians as changes occur in engine status or custody. Quarterly reports are also forwarded on installed engines, indicating the hours the engines have flown since the last overhaul, or since new if no overhauls have been performed. This later data is required for the preparation of failure rate reports used in the development of overhaul schedules,
The latest edition of NAVAIRINST 13700.15 prescribes reporting procedures for the Navy Aircraft Engine Management System (AEMS). These procedures are directed primarily to controlling custodians and Naval Air Systems Command Fleet Support custodians; therefore, controlling custodians issue instructions concerning engine management in their areas of control. The procedures discussed in the following sections are general in nature and may not contain the latest detailed information needed in preparing engine management reports. The latest instructions, directives, etc., issued by the appropriate controlling custodian must be followed when preparing engine management reports. These sections are intended to familiarize you, the AZ, with engine management and its application at the operating squadron level.
Each controlling custodian maintains a master file of engines assigned to their custody. This master file is updated daily by engine transaction reports (ETRs) and quarterly by end-of-quarter (EOQ) reports of installed engines. These reports are forwarded by the reporting custodians. The data required by the Naval Air Systems Command Headquarters is extracted from these reports and forwarded by the controlling custodians. Controlling custodians and the Naval Air Systems Command use automatic data processing equipment in processing engine data; therefore, certain information must be reported in code form for automatic data processing.
Custodian codes are used for engine management purposes to identify the controlling custodian or Naval Air Systems Command Fleet Support activity having control of an engine. Custodian codes are identical to the activities' unit identification codes (UICs). UICs are also used to identify reporting custodians. All activities holding physical custody of engines are engine reporting custodians. UICs for reporting custodians are listed in the Navy Comptrollers Manual, volume 2, chapter 5.
Status codes are two-digit numbers that describe the condition of an engine, the purpose for which an engine is being used, or the stage of progress that an unserviceable engine or serviceable engine has reached in the maintenance cycle.
STATUS codes are divided into the following series:
11 series - Installed Engine/Propulsion System Category
13 series - Installed Module Category
21 series - Serviceable Uninstalled RFI Spare Engine/Propulsion System Module Category
23 series - Serviceable Uninstalled RFI Engines/Propulsion System/ModulesContinue Reading