It's unclear whether the medical jet was required to have a functioning cockpit voice recorder. In the U.S., it depends on the size and type of plane. However, the Learjet 55 that crashed in ...

which might provide clues as to what was happening in the cockpit during the crash. The Learjet did have such a recorder, though it was an older, tape-based model. (Newer ones are solid-state ...

US investigators have disclosed that the cockpit-voice recorder on the ambulance Learjet 55 which fatally crashed in Philadelphia failed to capture audio from the flight. The 30min recording tape ...

(NEXSTAR) – The cockpit voice recorder in the medical transport ... crew made no distress calls to air traffic control. The Learjet 55, bound for Springfield-Branson National Airport in Missouri ...

A cockpit voice recorder was not functioning ... And while the doomed Learjet 55 was in contact with an air traffic control tower, "there were no distress calls received from the flight crew ...

NTSB releases an image of the cockpit voice recorder (CVR) of the Learjet 55 that crashed on Jan. 31 in Philadelphia. The CVR was located at the site of initial impact, at a depth of 8 feet.

The Learjet may not have been required to have a functioning recorder either. Wolk says in the U.S., all planes with 6 or more seats (not including pilots) are required to have a cockpit voice ...

The cockpit voice recorder ... released its preliminary report into the Jan. 31 crash of a medical Learjet 55 bound for Missouri that crashed in Philadelphia, killing two pilots, two crew members ...