NTSB, Learjet and Philadelphia

The NTSB Released Its Preliminary Report On The Learjet Crash In Philadelphia
Cockpit recorder wasn’t working on medevac flight that crashed in Philadelphia — and likely hadn’t for years: NTSB
 · 3dAviation Week Network
No Recording Made Of Learjet Crash, NTSB Says
PhillyVoice4d
Voice recorder on medical jet that crashed in Northeast Philly contains no cockpit audio, NTSB says
Investigators have not yet determined what caused the Learjet 55 to nosedive seconds after takeoff on Jan. 31. The crash killed 7 people and injured 24 others.
AeroTime3d
Philadelphia crash investigation reveals black box not recording audio for years
In its investigation of a deadly Philidelphia crash, the NTSB has said that the CVR failed to record the flight and had likely not been logging audio for years.