NTSB: Medical Jet’s Voice Recorder Wasn’t Working For Years Before Philadelphia Crash

6 weeks ago The National Transportation Safety Board says a cockpit voice recorder was not working on a medical transport plane that crashed in Philadelphia in January and likely had not been working for several years. In a preliminary report issued Thursday, the NTSB also confirms the flight crew made no distress calls to air traffic control. The medical transportation plane plummeted into a residential and commercial area within a minute of taking off from Northeast Philadelphia Airport on Jan. 31. The crash killed all six people aboard the Learjet 55 and a seventh person who was inside a vehicle on the ground. At least two dozen others on the ground were injured.