Originally Posted by
ssullivan
Do they really need a STC for taking out a row of seats? I can't remember any mention of that with any prior changes to seat arrangements that have happened.
Yes, not only is a STC required but the LOPA (Layout of Passenger Accommodations) must also be submitted and certified before installing the interior.
Here is UA (CO's) STC for the 737-900/900ER E+ reconfiguration:
STC