We reported to US Airways how their online Lost and Found form leads to a 404 error, and this is the response we got:
Dear Ben Popken,
Thank you for visiting usairways.com.
I apologize for any inconvenience you may have experienced.
The Central Resolution Office will make every effort to locate unchecked items you may have left on board a recent US Airways flight or left at an airport location. Items are forwarded to the Central Lost and Found facility from all US Airways cities twice a week.
The number to our Central Lost and Found facility in Phoenix is 480-693-2360. This is a voice message system and we will contact you when your item has been found.
If you have any further questions or concerns, please feel free to reply or call our Internet Support Desk at (800) 327-7810. We know that you have many choices and we thank you for choosing US Airways!
Internet Support Specialist
Calling 480-693-2360 leads to a recording, with no option for leaving a message, that tells us to submit our request through US Airways online Lost and Found form… which is still broken. — BEN POPKEN
Lost And Found [US Airways]
This is how you get to the US Airway Lost and Found page: