- Medical plane’s voice recorder likely wasn’t working for years before Philadelphia crash The Associated Press
- Philly plane crash: NTSB says cockpit voice recorder did not capture doomed flight’s final moments FOX 29 Philadelphia
- Cockpit recorder wasn’t working on medevac flight that crashed in Philadelphia — and likely hadn’t for years: NTSB New York Post
- Black box of ambulance jet that crashed in Philly wasn’t recording audio, likely hadn’t worked for years: NTSB Fox News
- No voice recording from medical jet crash: NTSB releases preliminary report USA TODAY
Medical plane’s voice recorder likely wasn’t working for years before Philadelphia crash – The Associated Press
