Police and investigators probing the deadly plane crash in Madrid have questioned the mechanic who cleared the plane for takeoff after tending to a minor mechanical problem, the airline said Saturday. Spanair said the mechanic dealt with a problem in an air temperature gauge that forced the pilot to abandon a first attempt to take off. About an hour later, when the MD-82 finally did take off, it crashed near the end of the runway, burning and largely disintegrating. A total of 153 of the 172 people aboard were killed. The newspaper El Pais quoted unnamed sources close to the investigation as saying that during two sessions of testimony Friday – first with police and then with crash investigators – the mechanic insisted that the gauge malfunction was a minor glitch which had nothing to do with Wednesday's crash. A Spanair official told The Associated Press on Saturday it had no details of the man's testimony, but reiterated that the mechanical problem did not cause the crash. The official spoke on condition of anonymity, citing company rules. Aviation experts have told The AP this problem probably did not cause the crash. All 19 survivors of the crash remained hospitalized Saturday, two of them in critical condition. The worst off was a 31-year-old woman with burns to 72 percent of her body. Her husband died in the crash but her six-year-old son survived. Only 50 bodies have been identified so far. Many were burned beyond recognition and forensic teams have been using DNA techniques for identification. Spanair said the mechanic dealt with the gauge problem by essentially turning the device off, and said this was an accepted procedure.