miamiair Posted June 22, 2009 Share Posted June 22, 2009 Has anyone ever changed a sloping longeron? Quote Link to comment Share on other sites More sharing options...
bonzo Posted June 23, 2009 Share Posted June 23, 2009 Hi miamiair, I have seen it done quite often here at the Depot. it takes a long time that's all. Make template of the holes of the old one you get off the plane. Good luck with rigging the ramp and door. Quote Link to comment Share on other sites More sharing options...
miamiair Posted June 23, 2009 Author Share Posted June 23, 2009 Hello Bonzo, How long does it usually take you guys... This bird has both longerons needing replacement along with replacing both 737 terminal fittings. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted June 23, 2009 Share Posted June 23, 2009 Why not just change the aft section from 737 back? Sounds like it might be easier!!! Quote Link to comment Share on other sites More sharing options...
miamiair Posted June 23, 2009 Author Share Posted June 23, 2009 Why not just change the aft section from 737 back? Sounds like it might be easier!!! Errr, no! Not really feasible. Quote Link to comment Share on other sites More sharing options...
Kwrong1 Posted June 27, 2009 Share Posted June 27, 2009 I have seen it done about half a dozen times by depot teams, the first time they spliced the longeron in, and yes it was a nitemare to rig the cargo door and ramp again. I have seen it take as long as couple weeks to two months. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted July 13, 2009 Share Posted July 13, 2009 They briefed at the PIWG that they are using a milling machine from the F15 depot floor to drill holes in the new longeron after the machine measures the hole pattern on the old one. It was supposed to cut quite a bit of time off the entire job. Quote Link to comment Share on other sites More sharing options...
ENRGZR Posted July 15, 2009 Share Posted July 15, 2009 Have fun is all I can say. We did it at Eglin once... Not a fun task Quote Link to comment Share on other sites More sharing options...
pjvr99 Posted July 16, 2009 Share Posted July 16, 2009 Been part of the work crew once and seen it done several times. Most important thing is shoring the empennage before removing anything. Once the item is removed, make a template of 1/4" aluminium ..... job shouldn't take more than 2 - 3 weeks Quote Link to comment Share on other sites More sharing options...
br6ppc Posted September 3, 2009 Share Posted September 3, 2009 I'm an ex-C-130 sheetmetal mech turned planner at Robins. I have changed at least 12 of the sloping longerons. If you need more info, send me a PM and we can discuss this. 1 Quote Link to comment Share on other sites More sharing options...
Ahsan Posted March 9, 2020 Share Posted March 9, 2020 I need slopply longeron procedure.. can you send me procedure Quote Link to comment Share on other sites More sharing options...
Ahsan Posted March 9, 2020 Share Posted March 9, 2020 Replacement procedure of slopply longeron I need Quote Link to comment Share on other sites More sharing options...
mecano flyer Posted March 13, 2020 Share Posted March 13, 2020 (edited) Hi guy, just a question about this longeron, we have a broken tilted tang in our longeron that we have not any repair in according to our structural repair manual . But there are other repairs concerning in the other places of this longeron such as a vertical tang and the angular part. so can any one suggest a solution for this huge problem, thanks. Edited March 13, 2020 by mecano flyer Quote Link to comment Share on other sites More sharing options...
Ahsan Posted March 13, 2020 Share Posted March 13, 2020 Actually we replace slopply longeron so I need some points which helps to change longeron.. On 3/9/2020 at 4:24 PM, Ahsan said: Replacement procedure of slopply longeron I need Quote Link to comment Share on other sites More sharing options...
Ahsan Posted March 13, 2020 Share Posted March 13, 2020 12 minutes ago, mecano flyer said: Hi guy, just a question about this longeron, we have a broken tilted tang in our longeron that we have not any repair in according to our structural repair manual . But there are other repairs concerning in the other places of this longeron such as a vertical tang and the angular part. so can any one suggest a solution for this huge problem, thanks. Actually we replace slopply longeron so I need some points which helps to change longeron Quote Link to comment Share on other sites More sharing options...
tinyclark Posted March 27, 2020 Share Posted March 27, 2020 I never saw a sloping longeron replaced at field level, only depot. It is not something that can be done with little or no knowledge. Quote Link to comment Share on other sites More sharing options...
Metalbasher Posted April 7, 2020 Share Posted April 7, 2020 Seen it done in the field but work performed by depot/CLSS personnel. Even then, somewhat tricky as field units are all equipped differently (machine shop/sheet metal tooling etc). Quote Link to comment Share on other sites More sharing options...
larry myers Posted April 7, 2020 Share Posted April 7, 2020 I'm with tiny, don't remember ever replacing one of these in the field. Do remember replacing several in conjunction with PDM. Additionally, there were a couple of aircraft discovered in the field with excessive corrosion requiring immediate replacement. In these cases we submitted a 103 and subsequently flew the aircraft to WR for replacement. This is not a job for the faint of heart. It is a heavy depot level task. Further, it requires highly skilled technicians not normally (ever) found at the I level. The shoring required is massive. The aircraft must be completely hangered and once maintenance commences it cannot be moved. Very precise alignment, measurement, drilling, fitting and much more required. Additionally, tooling most likely would be an issue. Not saying doing the task in the unit can't be done but only it'd probably increase difficulty and take longer. The bright side to all of this is WR has extensive experience doing this, dating back to 1972, perhaps earlier. I think it could be said, no one does it better. Keep in mine what is written above is my best recollection of events that occurred almost 50 years ago. Some or all of it may or may not be pertinent today. Quote Link to comment Share on other sites More sharing options...
miamiair Posted May 4, 2020 Author Share Posted May 4, 2020 It wasn't that hard to do. Shoring the airplane was the hardest part. You need guys that are artists, not butchers to do the work. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted May 11, 2020 Share Posted May 11, 2020 Glad it worked out for you. Your statement is why it isn't done at field level. Quote Link to comment Share on other sites More sharing options...
Ahsan Posted May 12, 2020 Share Posted May 12, 2020 I changed save and sound sloppy longeron Quote Link to comment Share on other sites More sharing options...
svetozar Posted June 28, 2020 Share Posted June 28, 2020 On 5/4/2020 at 4:28 PM, miamiair said: It wasn't that hard to do. Shoring the airplane was the hardest part. You need guys that are artists, not butchers to do the work. Hi can you tell me some help point for changing the sloping longeron !!! Thanks Quote Link to comment Share on other sites More sharing options...
Ahmed Posted December 27, 2023 Share Posted December 27, 2023 Hi Can anyone tell me how many hours of work it takes to replace it, including preparations before and after? Quote Link to comment Share on other sites More sharing options...
Metalbasher Posted January 2 Share Posted January 2 To my knowledge the field can't change them. Robins Engineering (for USAF and some FMS countries would dispatch a depot field team (military working at the depot or civilians specializing in such depot tasks) to the unit to perform the task. I'm sure there are some MROs that have teams available for dispatch similar to that of Robins depot. Quote Link to comment Share on other sites More sharing options...
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