On November 11, UAL992 had just lifted off from runway 30 at KIAD when their radios failed after being told to contact departure. The flight crew acknowledged the takeoff clearance but did not respond when told to switch to the departure frequency. UAL947 departed KIAD shortly after UAL992 and were asked by ATC to try and get in touch with UAL992. Eventually, the crew of UAL992 used ACARS to advise of the loss of radio communications. The entered a hold just west of Richmond, Virginia and after a short time returned to KIAD for a safe landing on runway 1R.
