Air India aims to make line maintenance works of aircraft in-house at its 55 domestic stations by April, the airline's CEO Campbell Wilson said on Friday. Line maintenance works of the planes are carried at 55 domestic stations (airports) and the airline has been working on doing the activities in-house amid expanding fleet. In a message to the employees, Wilson said the airline is making good progress on taking control of its line maintenance, with 42 of its 55 domestic stations now handled directly by Air India staff. "This gives much greater control on quality and timeliness and enables us to conduct a wider range of maintenance tasks in-house, including lighter checks during extended transits and overnight stops," Wilson, who is the CEO and MD of the Tata Group-owned airline, said. He also said that in-housing of the remaining 13 stations is on track to be completed by April. Loss-making Air India has embarked on an ambitious transformation plan. Last year, Air India merged .