I believe that your question is referring to Huban Gowadia's refusal to comply with a congressional subpoena in May 2017. The subpoena was issued by a joint subcommittee. The House of Representatives was attempting to force the acting director of the Transportation Security Administration (TSA) to answer questions about how the agency treats whistleblowers. Several members of Congress were concerned that the TSA was taking retaliatory measures against employees who tried to speak out concerning some of their practices. There had been a steady increase in allegations of misconduct over several years. These members of Congress worried that discouraging whistleblowers within the TSA could lead to lapses in security.
This subpoena came in response to Gowadia balking at an original request by Congress. She claimed that she could not share this information because it fell under the umbrella of attorney-client privilege. Eventually, Gowadia returned to Congress for a transcribed interview on the topic.
It does not seem as though this scuffle with Congress had much of an effect on Gowadia's position. She continued to serve as acting director of the TSA until the following August. Gowadia stayed with the agency until the next March when she left to join the Livermore Laboratory as the principal deputy for the National Ignition Facility and Photon Science Directorate.