From: www.unitedafa.org

Beginning May 5, Flight Attendants may choose to lock their line from others entering a trade and/or ANP/PTO requests on their behalf. 

This locking function, available through TRDKEY, may be activated or de-activated at any time.  Full story >

• Additional details on TRDKEY screen displays (.pdf from AFA)
• Quick Reference Guide (.pdf from United)
• TRDKEY Details (.pdf from United)