When Discovered code. The When Discovered code is a one-character, alphabetic code that identifies when the need for maintenance was discovered. Transaction code. The transaction code is a two-character, numeric code that shows the type of data being reported. Time/Cycle Prefix code. The Time/Cycle block is made up of a prefix and four numerical digits. The prefix indicates the source of time (usually in hours), cycles, or counts (rounds fired, number of catapult launches, or arrested landings). All entries in the Time/Cycle block are preceded by a prefix code. Some examples of these codes are as follows: A—indicates aircraft time and is used to report removal/installation of equipment not having an hourmeter installed or Aeronautical Equipment Service Record (AESR) or an SRC card maintained. E—indicates engine time (logbook time since overhaul). L—landings. M—indicates meter time. N—rounds fired. All entries in these blocks must be five digits. For example, report 27 hours type-equipment time as A0027. If the time exceeds 9,999 hours, record the last four digits only. For example, 10,231 hours would be recorded as A0231. Awaiting Maintenance Reason code (AWM). The AWM code is a one-digit, numeric code used to show the reason no maintenance is being performed. Q48. Q49. Q.50. Q51. Q52. Q53. Q54. What components create the Job Control Number (JCN)? What is indicated by a JCN suffix? What is a Work Unit Code (WUC)? What code describes the maintenance performed on an item identified by a WUC? What is the proper name for what most technicians refer to as the Manufacturer ’s code? What is a Malfunction code? How many positions complete the Time/Cycle block on a VIDS/MAF? SE RECORDS, FORMS, AND DOCUMENTS LEARNING OBJECTIVE: Identify the records, forms, and documents used for support equipment (SE) maintenance management and their purposes. Throughout the operational life of an end item of SE, many records, forms, and documents are generated for the support and management of that particular item. The following records, forms, and documents (which effect transfer of SE) are used to obtain and maintain the history of operation, maintenance, and configuration status. SE CUSTODY AND MAINTENANCE HISTORY RECORD, OPNAV 4790/51 This form is used to record acceptance information, custody and transfer, rework, preservation and depreservation, and TDs. It also includes a record of periodic maintenance performed by hours, starts, date completed, next PM due, activity and signature. It accompanies all items of SE that have formal periodic maintenance requirements; for example, MRCs, MIMs, handbook of service instructions, manufacturer’s handbook, and applicable TDs. Exceptions are precision measuring equipment (PME), engine test cells and stands, and GB1As (these items have their own records). However, those items of PME that have formal periodic maintenance requirements, in addition to calibration requirements, will require this form; for example, versatile avionics shop test (VAST) stations. Reporting custodians retain the latest completed copy, the current copy, and transcribe accumulated data on initiation of each new record (fig. 1-12). This form accompanies weapons and support equipment (WSE) to the weapons department when subcustodied from AIMD. You can find an example of the form, along with step-by-step instructions, in OPNAVINST 4790.2. Q55. Q56. Q57. What form is used to document preservation of support equipment? Are SE Custody and Maintenance History Records, OPNAV 4790/51, used to document rework maintenance on an engine test cell? Who retains the latest completed copy of the SE Custody and Maintenance History Record, OPNAV 4790/51? 1-23