Probabilmente un Lightweight Data Recorder (LDR).
PC12 AFM — LDR simultaneously records:
• One channel of audio from the pilot’s audio panel. The latest 120 minutes of
recorded audio data is retained.
• One channel of audio from the Cockpit Area Microphone (CAM). The latest 120
minutes of recorded audio data is retained.
• One channel for flight data information received from the Modular Avionics Unit
(MAU) by ARINC 717 databus. The latest 25 hours of ARINC data at a rate of
256 words per second is retained.
The LDR correlates the voice and flight data to within ± 1 second.