Months after the Air India crash that killed over 260 in Gujarat, Pushkaraj Sabharwal, father of pilot Captain Sumeet Sabharwal, has demanded a formal probe by the central government. In a letter to the Civil Aviation Secretary and AAIB chief, the 91-year-old said the AAIB findings tarnished his son's image. "These innuendos have very adversely affected my health," Pushkaraj added.