Talk:Line-replaceable unit

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Aviation: Aircraft

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Untitled

Removed a line saying that LRUs are commonly referred to as black boxes. If anyone can source that it can go back in but I think it's wrong. Black boxes are LRUs, LRUs are not black boxes. 208.78.72.18 (talk)

--- — Preceding unsigned comment added by 208.78.72.18 (talk) 16:50, 29 October 2012 (UTC)[reply]

Untitled

In aviation, LRU's are not strictly electronic. LRU can apply to any type of assembly, mechanical or electrical. —Preceding unsigned comment added by 12.232.11.213 (talk • contribs) 06:49, 31 October 2003

Definition of a Line-replaceable unit

Unit which can be exchanged / replaced at a given time (usually when the unit is faulty). The definition of the unit depends on spares and tools available, the skills of the persons exchanging the unit and urgency to replace the unit. —Preceding unsigned comment added by 217.194.34.103 (talk • contribs) 11:41, 27 October 2006

Orbit Replaceable Units

Orbit Replaceable Units (ORUs) are mentioned in the article, but I'm not sure they match the current definition of items repaired at the organizational level. I would imagine support echelons for space stations would include ground support, and also spares inventory for unreliable parts on the station itself, but I'm not sure how these would map into the traditional USAF organizational, field, and depot support levels. As always, citations help to gain perspective. 70.251.149.197 (talk) 18:54, 20 February 2009 (UTC)[reply]

Air Transport Rack (ATR)

Since ATRs are a type of LRU shouldn't they be listed under this article? I don't see any reference to ATRs in the LRU article. Also, there are articles that reference ATRs, but there isn't a specific ATR article on Wikipedia. I think it would be proper to direct the ATR links to the LRU article. Any thoughts? KittyHawkFlyer (talk) 01:55, 4 March 2023 (UTC)[reply]

Meaning of "line"

Hello; My native language is not English. I couldn't find the answer to my question in this article either. I would like to share my question here, believing it might contribute to this page. The Turkish translation of the acronym LRU seems quite meaningless in Turkish. More specifically, the first word "Line" feels very vague. For example, using "saha" (field) makes much more sense: "Sahada değiştirilebilir birim" (Field replaceable unit). This acronym seems to originate from the military field, so from that perspective, the word "cephe" (front-line) could also be appropriate: "Cephede değiştirilebilir birim" (Front replaceable unit). I then noticed that in English, the word "line" can also mean "front-line." Could LRU potentially stand for "(front-)line) replaceable unit"? Could someone who is a native English speaker and familiar with English etymology answer this? Senoleker (talk) 08:19, 10 December 2024 (UTC)[reply]

It is in the lead section, ...designed to be replaced quickly at an operating location (1st line). Operating location is a good way to describe it. I can describe the British military system, a line of aircraft on an airfield is the 'flight line', a now disbanded trade was Flight Line Mechanic (known as 'lineys', could refuel, carry out flight servicings etc). Hardened Aircraft Shelters were also classed as first line, squadrons operated aircraft from these.

Second line was station (base) level servicing, aircraft spend up to a month in a hangar being inspected, repaired as necessary (IRAN), flight tested and returned to the squadron. This term also applied to components having routine servicing in small workshops on the same base (know as 'bays' e.g. tyre bay, hydraulic bay, oxygen bay etc).

Third line was deep strip (Major) servicing, usually at a different base, aircraft are ferried there and back.

Fourth line was deep component servicing/instrument calibration etc, sometimes carried out by the manufacturer.

It's not related to a military fighting line as you suggest, just different levels of maintenance or repair. The LRUs typically take five minutes to change, any functional checks involved can range from very simple to very involved. Civilian convention generally follows the same system. Nimbus (Cumulus nimbus floats by) 09:57, 10 December 2024 (UTC)[reply]