Originally Posted by
findark
To plate on 016 stock, you either need to book the LH code by phone or book the UA code online and call immediately to have it changed to the LH code. UA-coded PE tickets in O and A are GPU-eligible for LH flights (after conversion).
In many cases, Google Flights is useful for plating LH-coded flights on UAL 016 stock without agent intervention. There are reports in a more detailed thread of agents refusing to convert UA codeshares back to native LH flight numbers when ticketed on United stock. A HUACA situation, but worth knowing.