Part 3/9:
After departing from various layovers, the crew was poised for the final leg of their journey to Belém, but this flight would quickly morph into a perilous escapade. Specifically, the flight crew failed to notice the extensive notes about an inoperative Non-Directional Beacon (NDB), which had not been functioning for four months. While not critical for navigation – given good weather conditions – this oversight would soon become pivotal.
Due to a recent update in flight plans, the captain misinterpreted the navigation course from 0270 (which indicated 27 degrees) to 270 degrees, a significant navigational error leading them in the wrong direction.