used in conjunction with other publications, such as the
MRIL and/or Hazardous Material Information Systems
Items are listed in NIIN sequence. Each microfiche
is arranged, as shown below. Blanks indicate that a
specific code is not applicable to the NSN.
CogThe cognizance code assigned to the
MCCThe material control code assigned to
FSCThe Federal supply class assigned to the
NIINThe national item identification number.
SMICThe special material identification
REPThe repairable material code.
SCCThe security classification code.
SLThe shelf-life code.
SLAThe shelf-life action code.
HZDThe hazardous material identification/
In addition the following categories of items
requiring special handling are contained in the LIRSH:
Repairable Items-Refer to NAVSUP P-4107,
Master Repairable Item List (MRIL), for turn-in
Shelf LifeItems determined by the inventory
manager to be deteriorative in nature.
Physical Security Code Itemrefer to
OPNAVINST 5510.1C for special handling
instructions. (other than unclassified SCC U
Hazardous Items-Refer to DOD 6050.5L and
LR, HMIS, for labeling and storage
The codes and definitions for data printed in the
LIRSH are listed in the NAVSUP P-4000.
MASTER REPAIRABLE ITEM LIST (MRIL)
The MRIL is a catalog of Navy-managed repairable
items. The primary purpose of the MRIL is to provide
fleet activities the data required for disposition of NRFI
(Not Ready for Issue) repairables, including repair level
data, shipping data, or, when applicable, local disposal
instructions. In addition, other selected management
data is provided. The MRIL is with the instructions
listed below. When preparing repairable for retrograde
SHIPS follow the instructions for
documentation, marking, tagging and
transfer/shipment found in NAVSUP P-485.
Guidance for protecting and packaging
repairables for shipment is found in NAVSUP
STRATEGIC SYSTEMS PROJECT OFFICE
COGNIZANCE MATERIALThis includes
Cognizance Codes 6A, 6H, 8H, 2P, 4P, 6P, 8P,
2X, 4X, 6X, and 8X. FLEET Ballistic Missile
(FBM) activities will process FBM repairable
in accordance with the FBM Master Repair List
(MRL) as specified in SPCCINST 4423.39
These are the FBM Weapon System
Repairable Program Requirements and
Procedures. Non-FBM activities should prepare
invoices and ship these materials in accordance
with the instructions contained in the MRIL.
References to applicable instructions for shore
activities and foreign governments when preparing
repairables for retrograde shipment are contained in the
The MRIL is divided into two parts:
Part IListing of Items: Contains NSNs and
NICNs of repairable items, and aircraft engine
type/mode/series identifiers, and information needed
to make repair/turn-in determinations on repairable
and aircraft engines. Items in this part are listed in the
following sequence: (1) NICNs in NIIN sequence, (2)
NSNs in NIIN sequence, and (3) engine models in
alphanumeric sequence. (See figure 4-7.)
Part IIShipping Addresses: Contains addresses
of designated overhaul points (DOPs) including
contractors, and other indicated destination for all items
listed in Part 1. Addressees are listed in shipping code
sequence. (See figure 4-8.)
How to Use the MRIL
IF THE NATIONAL STOCK NUMBER IS NOT
KNOWN. Look up the part number/reference number
In the MCRL.If part number appears more than once,
refer to CAGE (using Cataloging Handbook H4-2) to
determine the manufacturer. Once the right part
number has been found, the NIIN can be determined.
Using the NIIN, refer to Part I for shipping