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:
Aindicates 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.
Eindicates engine time (logbook time since
Mindicates meter time.
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.
What components create the Job Control
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
LEARNING OBJECTIVE: Identify the
records, forms, and documents used for support
equipment (SE) maintenance management and
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
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, manufacturers 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.
What form is used to document preservation of
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,