DISCD (WHEN DISCOVERED CODE) block.
Contains a one-character alpha code to identify when
the need for maintenance was discovered.
T/M (TYPE MAINTENANCE CODE) block.
Contains a one-character alpha or numeric code to
describe the type of maintenance action that is being
POSIT (POSITION SENSITIVE INDICATOR
[PSI]) block. Contains the two-digit PSI of a.
component that has been identified in the applicable
WUC manual by a double asterisk (**). Position
sensitive indicators are used to evaluate performance
and/or logistics characteristics between identical
components. A PSI identifies location by using a
general position code or a specific position code.
General position codeA two-digit alphanumeric
code that indicates a location by use of plain
language. For example, LH/RH indicates
left-hand or right-hand installations such as
main landing gear components, tires,
side-by-side cockpit components, and so forth;
and FW/AF indicates fore and aft positions
such as tandem cockpit components. UP/LW
indicates upper or lower positions such as
anti-collision lights or antennas. PR/SC/AL
indicates primary, secondary, or alternate
positions such as hydraulic components or
multiple avionics component installations.
Numbers 01, 02, 03, 04, and so forth indicate
positions by using a numbering system; for
example, rotor dynamic components are
numbered as are the positions of fuel nozzles
on a gas turbine engine.
Specific position codeA two-digit alphanumeric
code that indicates a specific location by using
alphanumeric sequencing to show the position.
FID (FAULT ISOLATION DETECTION) block.
The block is reserved for future use and left blank.
SAF/EI SER (SAFETY/ENGINEERING IN-
VESTIGATION SERIAL NUMBER) block. Contains
the locally assigned four-digit safety EI serial number.
METER block. Contains the SE meter reading for
on-equipment work on G, H, or S type equipment codes
SE MFGR blockIs left blank.
INVENTORY CODE block. Contains a one-digit
alpha or numeric code to describe the status of an
aircraft during a transaction. Inventory status codes
denote the status of the aircraft or equipment at the time
of inventory; for example at the inventory conducted
because of gain, loss, or a change in material condition
reporting status (MCRS). Inventory status codes for
aircraft should coincide with the applicable OPNAV
XRAY status reportable codes as specified in the
Aircraft Inventory Reporting System (AIRS),
OPNAVINST 5442.2. There is an inventory status
code for inventory only, fully operational, standard
depot-level maintenance, special work, special rework
at the reporting custodian site, and other (decision to
strike, remove from service, bailment, loan, and so
0Inventory only. Equipment that is inventoried
but no mission capability data is collected.
These items will only be gained or lost and will
require no change in MCRS reporting. This
code is used for equipment only and should
NOT be used for aircraft reporting.
AFully operational. Aircraft or equipment in the
inventory system that are in a fully operational
1Standard depot-level maintenance (SDLM).
Those aircraft or equipment that are en route to,
awaiting, or undergoing SDLM.
2Special work. Aircraft or equipment that are en
route to, awaiting at, or undergoing special
rework (modification, modernization,
conversion, or repair) in the physical custody
of a depot-level repair activity.
3Special rework at the reporting custodian site.
Aircraft undergoing depot-level special rework
that consists of modernization, modification,
conversions, or incorporation of depot level
technical directives while in the physical
custody of the reporting custodian. Aircraft
that receive depot-level repairs while in the
physical custody of the reporting custodian
remain in inventory code A.
4Other (decision to strike, remove from service,
bailment, loan, and so forth). Those aircraft or
equipment that are affected by reasons other
than standard or special work.
PERM (PERMANENT) UNIT CODE (PUC)
block. Contains a six-digit code that identifies the
organization that completes the transaction.