There are still too many loose ends. If a formal permission had been applied for, with all relevant papers, then how is that the crew arrested in Bombay had no papers on them, not even their Pakistani visas and passport documents. More importantly, the ATCs, meant to monitor all flights on a second-to-second basis, seem to have no idea where the aircraft proceeded to from Calcutta. From the moment an aircraft enters Indian airspace, the ATCs monitor its entire route. Ordinarily, if an aircraft is lost on the radar monitor for more than five minutes, a rescue operation is launched. In this case, the flight was untraced for three hours on December 17 as it supposedly flew to Varanasi, a distance covered in less than 45 minutes. Investigators say this was the time the aircraft required for a detour to Purulia.