Go look at the pictures posted on amazon of the below described wall mount that bent from a 54S1 panasonic.
Look under see all customers images below picture of wall mount.
The type mount is listed below.
VideoSecu full motion articulating tilting swivel TV LCD wall mount bracket arm for 37"-55" LCD LED LFD TV Super Strong Single Arm 27" Extension Swivel Flat Panel Television LCD Plasma Tilt Wall Mount Free 7 ft HDMI cable W13
Seems amazon doesn't list reviews in order , they put them in radom and you have to click on a link to see reviews as per day time etc. that come in . So something that can happen today maybe posted in their reviews at number 40 or so ! Looks like a way to bury negative reviews or does it ?
Go look at the pictures posted of what two parts that are actually holding your tv off the end of this mount, Pictures of either a bend or bent plate. The part is already stressed from being bent during manufacturing.pictures tells the story. Was told these are tested at 300 lbs.This panasonic tv weighs less than 100 lbs. The plate in comparrison to the back plate prior to hanging tv looked fine, afterwards you will see in the pictures how it changed .
After all the work to mount the bracket and the tv to only see the bracket bending outward an inch or so was scary and a let down to see the stress the tv was putting on this bracket with fear it would eventually break. frustrated after wanting to watch my new tv on the wall I had to take the front of that mount off and hung it on the back bracket which is more than strong enough though now I haven't what I wanted and that was having the articulaing swival arm to be able to hook up cables etc as well as see the tv from a different angle. I would NOT hang anything more than a 42" tv on this bracket if that. Now comes the part what do I do about it and the time and effort to remove the tv, remove the bracket ,packing it up and sending it back and start from scratch again. Frustrating to say the least.