(CNN) -- The U.S. Office of Special Counsel has substantiated allegations of a Federal Aviation Administration safety inspector who previously charged the FAA ignored safety violations witnessed in Pittsburgh, Pennsylvania, the office said Tuesday.
The violations occurred at the Pittsburgh Flight Standards District Office.
"FSDO managers improperly closed enforcement actions, or failed to take enforcement actions," concluded the Office of Special Counsel.
The safety violations involved mechanical problems with aircraft at Erie Aviation, a repair station operator that services commercial airlines; C.J. Systems, which pilots helicopters for hospitals around the country; and Air Charter Service, an operator of private charter flights.
CNN reported two weeks ago on complaints from whistleblowers that the U.S. Office of Special Counsel had failed to take action in whistleblower cases and has been weakened by the fact that President Barack Obama has never appointed a permanent special counsel to lead the office.