- Medical plane’s voice recorder likely wasn’t working for years before Philadelphia crash The Associated Press
- National Transportation Safety Board releases new findings about plane crash in Northeast Philadelphia 6ABC Philadelphia
- Cockpit recorder wasn’t working on medevac flight that crashed in Philadelphia — and likely hadn’t for years: NTSB New York Post
- Philly plane crash: NTSB says cockpit voice recorder did not capture doomed flight’s final moments FOX 29 Philadelphia
- Black box of ambulance jet that crashed in Philly wasn’t recording audio, likely hadn’t worked for years: NTSB Fox News
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