Jul 15, Kathmandu - India has ordered its airlines to investigate fuel switches on several Boeing models after the Air India jet crash last month that killed 260 people. A preliminary report released by India's Aircraft Accident Investigation Bureau on Saturday found that the switches flipped from the run position to cutoff shortly after takeoff.

The report did not provide any conclusions or apportion blame for the June 12 disaster, but indicated that one pilot asked the other why he had cut fuel and the second pilot replied that he had not. India's Directorate General of Civil Aviation (DGCA) on Monday ordered an investigation into a locking feature in the fuel control switch on several Boeing models, including the 787 and 737.

The order comes after Boeing informed operators that the fuel switch locks on its jets were secure. But that was in accordance with a Special Airworthiness Information Bulletin (SAIB) issued by the US Federal Aviation Administration, which recommended inspections to ensure the locks could not be moved incorrectly.

Many Indian and international airlines have already started their own inspections of fuel switches. “It has come to the notice of DGCA that several operators, both international and domestic, have started inspections of their aircraft fleets as per SAIB,” the DGCA said in a statement. In view of SAIB’s view, all airline operators of affected aircraft should complete the inspections by July 21, the DGCA said.

The Boeing 787-8 Dreamliner was en route from Ahmedabad in western India to London when it crashed. All but one of the 242 people on board and 19 on the ground died in the crash. In a letter to employees on Monday, Air India CEO Campbell Wilson said the investigation into the crash was ongoing and that it would be unwise to jump to “premature conclusions.”