The Federal Aviation Administration said on Monday it will propose flight cuts at Newark Liberty International Airport, citing air traffic controller staffing, runway construction and equipment issues.

The Philadelphia Terminal Radar Approach Control suffered a new problem that briefly led the FAA to issue a ground stop while it ensured redundancies were working as designed. The FAA said operations have returned to normal.

The FAA said a telecommunications issue at the Philadelphia TRACON Area C facility, which guides aircraft in and out of Newark, caused the agency to issue a ground stop Sunday.