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DomFredette (talk | contribs) m Adding child's clarification of the LRU |
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While the term LRU has been in use for decades, MIL-PRF-49506, Notice 1 of 18 Jan 05, the Performance Spec for Logistics Management Information defines an LRU as:
<blockquote>An '''LRU''' is an essential support item which is removed and replaced at the field level to restore the end item to an operational ready condition. Conversely, a non-LRU is a part, component, or assembly used in the repair of an LRU / LLRU, when the LRU has failed and has been removed from the end item for repair.</blockquote>
<blockquote>A '''LLRU''' is a lower-LRU which is removed and replaced at the field level to restore its parent (LRU or LLRU) to an operational ready condition. As a LRU is considered the parent, the LLRU is considered as a child. A LLRU can also be a child from a child, Their is no diffrence between the child's level, only to seperate the parent from is child.</blockquote>
== Specifications ==
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LRUs may be designed to [[ARINC]] 700-series standards. The form factor of LRUs comply to ARINC Standards, [[ARINC 404]] and [[ARINC 600]]. LRUs are also defined by manufacturers like [[Airbus]] and [[Boeing]] and by various military organizations. In the military, electronic LRUs are typically designed to interface according to data bus standards such as [[MIL-STD-1553]].<ref>"The B-52H Integrated Weapon Interface Unit (IWIU) program is a newly developed Line Replaceable Unit (LRU) which will replace the current 1980s developed LRU’s which are becoming unsupportable. The LRU’s currently installed in the Stub Pylon/Heavy Stores Adapter Beam (SP/HSAB) provide the command and control link between the B-52H Offensive Avionics System and all “smart” MIL-STD 1760 current and future weapons carried on the B-52H." [http://www.defenselink.mil/contracts/contract.aspx?contractid=3521 United States Department of Defense Contracts, No. 615-07, May 21, 2007]</ref> On the [[International Space Station]], LRUs are referred to as [[Orbit Replaceable Unit]]s.
==Visual explanation==
<blockquote>image to follow</blockquote>
==See also==
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* [[Maintenance, repair, and operations]]
* [[Spare part]]
* [[Shop-replaceable unit (SRU)]]
==References==
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