New Delhi, March 15 -- Civil flight operations at four Indian Air Force (IAF)-controlled airports - Jodhpur, Srinagar, Pune and Adampur - are set to face temporary shutdowns or operational restrictions this year as authorities undertake planned runway maintenance and infrastructure upgrades, officials said. All four airports are joint-user facilities where civil flights operate from air force bases. Runway surfaces at such bases must meet the operational requirements of fighter jets and other military aircraft, making periodic maintenance essential. "Authorities have already issued Notams (Notice to Air Missions) for some of the closures, while airlines were informed months in advance through the government's slot coordination process," an official said. Among the four airports, the most immediate flight disruption is expected at Jodhpur, where runway re-carpeting work will be carried out in phases from the month-end. "The first phase of work was initially planned to begin from March 1 but is yet to commence. However, it will be ensured that its third phase will wrap up by May," another official said. As of March 1, Jodhpur sees 28 daily flight operations with around 4,000 to 4,300 passenger movements a day. Under the plan, the runway work in Jodhpur will be carried out in three phases to minimise disruption. In the first phase, roughly one-third of the runway will be closed, allowing aircraft such as the Airbus A320 to continue operating, though larger aircraft like the Airbus A321 may not be able to use the shortened runway. The second phase will require a complete shutdown of the runway when work moves to the central section. Jodhpur airport is proposed to remain fully closed for civil operations for about 30 days between March 29 and April 29. "Once this portion is completed, work will move to the final section of the runway, allowing partial operations again," the official said....