Garuda Indonesia Flight 152 (Merpati Nusantara Airlines Flight 152) was also in the area at the time. Earlier in the day, another Flight 152, Merpati Nusantara Airlines Flight 152, was handled by the same air traffic controller. This led to the controller mistakenly saying "Merpati one five two turn left heading 240 to intercept runway zero five from the right side"; as the wrong call sign was used, the Garuda pilots disregarded these instructions. The controller, on not receiving a response, queried the pilots on if they heard the instructions; this time the correct call sign "Indonesia 152" was used. The controller then repeated
Garuda Indonesia Flight 152 are brought to A310 standards, including the addition of electronic flight instrumentation. The two pilots aboard the accident flight were qualified to fly both the FFCC and the -600 model, however the adequacy of their conversion training between the two would later be called into question. At approximately 1:00pm, air traffic controllers in Medan cleared Flight 152 for an ILS approach into Runway 05 from its current 316 degree heading. The crew, led by Captain Rahmo Wiyogo, 42, a pilot with over 20 years of flying experience at Garuda Indonesia and more than 12,000 flying hours, and First Officer Tata