Also, the CVR is going to be helpful to unravel what the crew intentions were.
It might be,
if it had one!
DHC-300 MTOW is 5,670 kgs from the Transport Canada Type Certificate Data Sheet. Minimum crew = 1 pilot
PNG CAR 125:
125.367 Cockpit-voice recorder
A certificate holder shall ensure each of its multi-engined turbine powered aeroplanes with a MCTOW of
greater than 5700 kg is equipped with a cockpit voice recorder
if that aeroplane’s flight manual requires two or more flight crew members.