Aerospace Diary

Neelam Mathews Dec 14, 2012 Two Etihad flights- one bound for Mahe in Seychelles (EY 622) and the other for Lahore (EY 421) escaped mid-air collision over Pakistani air space as the Radar Control System in Pakistan’s Pisni area was shut for maintenance and the audio frequency system was unreachable because of bad weather, according to a Pakistani website that quoted a TV news report without naming the channel. Aerospace Diary could not confirm this. It was the airlines' Airborne Collision Avoidance System (ACAS) that alarmed the pilots about the situation.

Asia-Pacific Aviation Daily Jul 29 , 2010 , p. 10 Neelam Mathews Opening day of the new integrated Terminal 3 in Delhi was marred by service disruptions as radars stopped functioning, delaying flights by about one hour. “The ATC Computer System Auto Track III, which is under validation trials at Indira Gandhi International Airport, developed a technical snag at 5:30 p.m. However, the other computer system Auto Track II, which was maintained as hot stand-by, was being used for ATC operations. There was no disruption or delay on flight operations on account of this,” said a statement from the Airports Authority of India. More than 55 flights were delayed according to an air traffic control official. This is the third time this year that the air traffic management system at the airport has collapsed. The system crashed twice in January when Waltham, Mass.-based Raytheon’s Autotrac-III system was being tested for installation.