How airplanes are maintained today (Vanity Fair)

“Over the past decade, nearly all large US airlines have shifted heavy maintenance work on their airplanes to repair shops thousands of miles away, in developing countries, where the mechanics who take the planes apart (completely) and put them back together (or almost) may not even be able to read or speak English. US Airways and Southwest fly planes to a maintenance facility in El Salvador. Delta sends planes to Mexico. United uses a shop in China. American still does much of its most intensive maintenance in-house in the US, but that is likely to change in the aftermath of the company’s merger with US Airways.”