Originally Posted by Microwave

Very recently AA appears to have started allowing a challenge to EXP where PLT is granted during the challenge period. To complete the challenge, anywhere from 16,667 to 50,000 BIS miles are needed, depending on booking code and class flown. This has never been allowed before, and I don't know how long it will last, but it looks to be a response to the changes UA/CO have made. Otherwise, the standard response would be to challenge to PLT and slog to EXP the hard way.