The U.S. Senate Commerce committee has postponed until a later date today’s scheduled hearing on aviation safety, where one focus was slated to be Boeing’s 787.

Federal Aviation Administration (FAA) chief Michael Huerta and National Transportation Safety Board (NTSB) chairman Deborah Hersman were both expected to be questioned on the fix Boeing is now testing for its 787 battery system.

The aviation subcommittee is chaired by Sen. Maria Cantwell of Washington. A spokesman for Cantwell said the hearing was postponed due to a series of roll call votes scheduled for the time of the hearing.

“We’re doing a bunch of budget votes today,” said Cantwell spokesman Jared Leopold.

No new date has yet been fixed for the hearing.