repair of the support item is the depot level.
Z -Nonreparable. No repair is authorized.
(3) Recoverability code. Recoverability codes are assigned to support items to indicate the disposition action on
unserviceable items. The recoverability code is entered in the fifth position of the Uniform SMR Code format as follows:
Z -Nonreparable item. When unserviceable, condemn and dispose at the level indicated in position 3.
F -Reparable item. When uneconomically reparable, condemn and dispose at the direct support level.
H -Reparable item. When uneconomically reparable, condemn and dispose at the general support level.
D -Reparable item. When beyond lower level repair capability, return to depot. Condemnation and disposal not authorized below
L -Reparable item. Repair, condemnation, and disposal not authorized below depot/specialized repair activity level.
c. National Stock Number. Indicates the National stock number assigned to the item and will be used for requisitioning
d. Part Number. Indicates the primary number used by the manufacturer (individual, company, firm, corporation, or Government
activity), which controls the design and characteristics of the item by means of its engineering drawings, specifications, standards, and
inspection requirements to identify an item or range of items.
When a stock numbered item is requisitioned, the repair part received may have a different part
number than the part being replaced.
e. Federal Supply Code for Manufacturer (FSCM). The FSCM is a 5-digit numeric code listed in SB 708-41/-42 which is used to
identify the manufacturer, distributor, or Government agency, etc.
Description. Indicates the Federal item name and, if required, a minimum description to identify the item.
g. Unit of Measure (U/M). Indicates the standard of the basic quantity of the listed item as used in performing the actual
maintenance function. This measure is expressed by a two-character alphabetical abbreviation (e.g., ea, in, pr, etc). When the unit of
measure differs from the unit of issue, the lowest unit of issue that will satisfy the required units of measure will be requisitioned.
h. Quantity Incorporated in Unit. Indicates the quantity of the item used in the breakout shown on the illustration figure, which is
prepared for a functional group, subfunctional group, or an assembly. A "V" appearing in this column in lieu of a quantity indicates that
no specific quantity is applicable, (e.g., shims, spacers, etc).
a. Detailed manufacturing instructions for items source coded to be manufactured or fabricated are found in TM 11-5840-281-
b. Detailed assembly instructions for items source coded to be assembled are found in TM 11-5840-281-34-1. Assembly
components are listed immediately following the item to be assembled.
c. The following publications pertain to the AN/-TPN-18A and its components:
TM 11-5840-281-12-1, Radar Set AN/TPN-18A
TM 11-5840-281-20P-1, Radar Set AN/TPN-18A
TM 11-5840-281-34-1, Radar Set AN/TPN-18A
d. National stock numbers (NSN's) that are missing from P source coded items have been applied for and will be added to this
TM by future change/revision when they are entered in the Army Master Data File (AMDF). Until the NSN's are established and
published, submit exception requisitions to Commander, US Army Communications and Electronics Materiel Readiness Command,
ATTN: DRSEL-MM, Fort Monmouth, NJ 07703 for the part required to support your equipment.
e. Depot repair allocations for group numbers 0107 through 05 only will have piece parts available by requisition for authorized
AMSF/SRA's. Repairs may be accomplished by each AMSF/SRA within the capabilities and facilities available. Authorized special
repair activities (SRA) are as follows:
(1) Area Maintenance and Supply Facility, Europe, Mannheim, Germany.
(2) Area Maintenance and Supply Facility, Okinawa, Zukeran, Japan.
(3) The Air Traffic Control Maintenance Activity, Fort Rucker, Alabama.
How to Locate Repair Parts
a. When National stock number or part number is unknown.
(1) First. Using the table of contents, determine the functional group within which the item belongs. This is necessary since
illustrations are prepared for functional groups and listings are divided into the same groups.
(2) Second. Find the illustration covering the functional group to which the item belongs.
(3) Third. Identify the item on the illustration and note the illustration figure and item number of the item.
(4) Fourth. Using the Repair Parts Listing, find the figure and item number noted on the illustration.
b. When National stock number or part number is known.
(1) First. Using the Index of National Stock Numbers and Part Numbers, find the pertinent National stock number or part
number. This index is in NIIN sequence followed by a list of part numbers in alphameric sequence, cross-referenced to the illustration
figure number and item number.