NEWARK, N.J. -- The Federal Aviation Administration has grounded the company that hired the flight crew for the corporate jet that crashed last month while attempting to take off from Teterboro Airport, and claims it may be unqualified to fly passengers. The company, Platinum Jet Management, has also refused to fully comply with an FAA subpoena for documents, withholding training records, duty time records and pay records for pilots and mechanics, according to court papers the agency filed late Wednesday. The court documents were disclosed Thursday after a federal judge in Newark ordered Platinum Jet to attend a hearing Monday...