Monorail From United States of America, joined Sep 2004, 624 posts, RR: 5 Posted (7 years 5 months 1 week 5 days 11 hours ago) and read 1464 times:
From past threads, it has been said that it doesn't take all that long to change a seating configuration, such as when adding more rows or taking some out (like before and after AA's MRTC).
I understand the seats themselves can be moved readily. However, after searching, I'm still a little confused about a few things. When this happens how are the drop-down oxygen masks (and also the unit with the FA call button and seat lighting/air) addressed? When the seats are moved, they will not be aligned with the existing arrangement. Does this require a lot of work on the wiring? How long does this part take? I assume new paneling also needs to be installed below the overhead bins? Do IFE drop down screens also get moved in this process?
Fokker Lover From , joined Dec 1969, posts, RR: Reply 1, posted (7 years 5 months 1 week 5 days 10 hours ago) and read 1440 times:
PSU panels are moved in conjunction with the seats. Blanking panels are added or removed to keep everything lined up. Most PSU's are connected to rails and can be mounted anywhere. There are many connection points along the rails where you can just plug it in.
Some 737 have adjustable PSU filler panels that expand or contract to fill PSU component gaps as required. In my opinion, they do not look good, but I suppose the average paying pax doesn't look at the interor in the same way as someone that designs it.
Also, don't forget about wiring along the floor and a new pile of seat track fillers (or chopping a bit off the old ones).
And of course, if it's the first time for that configuration, you may need an STC revision and all the fun that goes with it like engineering changes and Interior Compliance DER walk-through.
Tod From Denmark, joined Aug 2004, 1682 posts, RR: 3 Reply 6, posted (7 years 5 months 1 week 3 days 14 hours ago) and read 1227 times:
Quoting HAWK21M (Reply 5): Quoting Tod (Reply 4):
Some 737 have adjustable PSU filler panels that expand or contract to fill PSU component gaps as required
Whats this.Any Details.
Two piece construction. One end telescopes in or out of the other piece. Unfortunately this mean that one piece is slightly wider than the other. When you sight down the PSU rail, the gap is different on the front and back halves of the filler assembly.
Litz From United States of America, joined Dec 2003, 1745 posts, RR: 0 Reply 7, posted (7 years 5 months 1 week 3 days 13 hours ago) and read 1219 times:
Just to clarify, to those who may not understand the lingo ...
PSU = Passenger Service Unit, or the little panel overhead w/the airvent, light, FA call button, etc.
The wiring looms (and gasper hose) for these has slack in it, so within reason, it can be slid around on its mounting rails ...
For you MX types, how easy is it to add or remove a PSU, if you are changing the number of seat rows in the plane? Are there extra connections up above that you just plug into? Wouldn't you also have to have additional (or fewer) drop-down masks ?
Tod From Denmark, joined Aug 2004, 1682 posts, RR: 3 Reply 8, posted (7 years 5 months 1 week 3 days 11 hours ago) and read 1207 times:
Quoting Litz (Reply 7): Are there extra connections up above that you just plug into?
There are usually more gasper and oxygen provisions than PSU's, but sometimes, especially at the end of a run you may come up one short.
(Then you can hire me to solve that problem ).
Quoting Litz (Reply 7): Wouldn't you also have to have additional (or fewer) drop-down masks ?
Yes, there should be an oxygen module installed for every row of seats. These must be installed so they drop in front of the pax, but within reach.
There is a specific range of acceptable locations in relation to the SRP (seat reference point) and it varies by aircraft model.
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 4 Reply 10, posted (7 years 5 months 1 week 2 days 19 hours ago) and read 1139 times:
To repitch an aircraft cabin involves the following; a new cabin layout drawing showing the new seating arrangement, repitching the seats, repitching the PSU's and emergency oxygen system, if there is inflight entertainment realigning the system so that the controls will operate the proper gadgets, performing a new weight and balance of the airframe, if you are adding seats ensuring that that configuration has been tested for the emergency evacuation, if not you have to run an actual test, using the proper spacers and covers over all gaps between the PSU's and between the seats at the floor line, ensuring that the emergency lighting is correct for the configuration, ensuring that the access to the emergency exits is correct, and usually acquiring a STC (supplemental type certificate) if the configuration is new.
Not as simple as it seems, is it?
Lincoln From United States of America, joined Nov 2004, 3887 posts, RR: 8 Reply 12, posted (7 years 5 months 1 week 1 day 10 hours ago) and read 1080 times:
Quoting Tod (Reply 4): Some 737 have adjustable PSU filler panels that expand or contract to fill PSU component gaps as required. In my opinion, they do not look good, but I suppose the average paying pax doesn't look at the interor in the same way as someone that designs it.
It seems to me that Continental uses these (or something similar -- for some reason I thought they were individual panels of (roughly) 5" and 2" were used rather than telescoping) -- and this pax always notices them first thing
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