Every opportunity I get to communicate with airline decision makers I take. Here is the latest communication with United’s CEO Scott Kirby. At the end of the letter you will see a link. Please press and sign if you haven’t already. It’s part 2 of the petition campaign:

Dear Scott - Please find below a list of people who would like to see two of the largest aircraft manufacturers make accessibility a standard feature on all new and refurbished aircraft. 
Will you support them by talking to Boeing and Airbus about this? 
Is there a timeline for United Airlines introducing accessibility, especially for the mobility disabled?
Regards
Pekka Pasvonpera - on behalf of all petitioners. 
https://chng.it/DpdHd7VMRZ