It was the first crash of a Sukhoi Superjet 100,

Defense Secretary Leon Panetta on Tuesday ordered the Air Force to take new steps to address an undiagnosed safety problem with its Lockheed Martin Corp.-made F-22 LOUIS VUTTION MEN SHOES SALE fighter jet, including limiting the distances it can fly between landing zones. The new restriction does not affect the war effort in Afghanistan because no F-22s are deployed there. The fighter has never flown in combat with the only F-22s operating overseas in the United Arab Emirates, where they recently arrived for training missions. The limit on flight distances, however, means the routine mission of patrolling U.S. airspace in Alaska will be done by other aircraft, officials said. The Panetta order is an unusual intervention at the highest level of the Pentagon in a service-specific problem, and it may be seen by some -- including critics of the F-22 program on Capitol Hill -- as a sign of the program's political vulnerability. The Air Force acknowledged last week that some of its aviators are refusing to fly the radar-evading F-22 Raptor, whose pilots in some cases have complained about oxygen-deficit problems which have caused dizziness, blackouts and other symptoms that arise when the body doesn't receive enough oxygen. The Air Force has been unable to determine the root cause of the problem. Panetta's chief spokesman, George Little, told reporters that Panetta supports the Air Force's efforts to get to the bottom of the problem. "However, the safety of our pilots remains his first and louis vuitton hoodie men foremost concern," Little said. "Therefore, in addition to those measures already taken by the Air Force to mitigate risks to our pilots, he is directing the Air Force to take three additional measures." Panetta ordered an acceleration of an existing Air Force effort to install an automatic backup oxygen system in every F-22; directed that all F-22 flights remain "within the proximity of potential landing locations" so that they can land quickly in the event they encounter a physiological problem in the cockpit; and he told the Air Force to provide him with a monthly report on progress toward finding the root cause of the problem. Indonesian authorities said Wednesday that they had found part of the flight recorder of the Russian passenger jet that crashed into the side of a volcano during a demonstration flight last week, killing 45 people. Searchers retrieved the cockpit voice recorder, which records communication between pilots and air traffic controllers, but have so far been unable to locate the flight data recorder, said Vice Marshal Daryatmo, head of the National Search and Rescue Agency. He said the voice recorder would be brought to burberry bags outlet Jakarta for analysis. Rescue workers found no surivors from the Sukhoi Superjet 100, Russia's newest passenger plane, which slammed into Mount Salak after disappearing from radar screens on May 9. Most of the wreckage of the plane is on a steep slope at an altitude of 6,000 feet, making it difficult to reach. The Indonesian and Russian authorities are investigating the cause of the crash, which remains unclear. The plane was on a demonstration flight for Indonesian Ministry of Transportation officials and representatives of Indonesian airlines. It was the first crash of a Sukhoi Superjet 100, according to the Russian state-run news agency RIA Novosti. The plane was on its second demonstration flight of the day when it lost contact with air controllers at Jakarta's Halim Perdanakusuma Airport. The Sukhoi jet arrived in Jakarta as part of a demonstration tour of six Asian countries. It had been to Myanmar, Pakistan and Kazakhstan, and was scheduled burberry outlet to visit Laos and Vietnam after Indonesia, RIA Novosti said. Sukhoi manufactures military aircraft and is known especially for its fighter jets. Its civilian aircraft is narrow-bodied with a dual-class cabin that can transport 100 passengers over regional routes.