The Disturbing Truth About How Airplanes Are Maintained Today

Over the past decade, nearly all large U.S. 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 U.S., but that is likely to change in the aftermath of the company’s merger with US Airways.

The airlines are shipping this maintenance work offshore for the reason you’d expect: to cut labor costs. Mechanics in El Salvador, Mexico, China, and elsewhere earn a fraction of what mechanics in the U.S. do. 

In part because of this offshoring, the number of maintenance jobs at U.S. carriers has plummeted, from 72,000 in the year 2000 to fewer than 50,000 today. But the issue isn’t just jobs. 

Safety is an issue here, too. The Federal Aviation Administration is supposed to be inspecting all the overseas facilities that do maintenance for airlines—just as it is supposed to inspect those in America. But the F.A.A. no longer has the money or the manpower to do this.

The airplanes that U.S. carriers send to Aeroman undergo what’s known in the industry as “heavy maintenance,” which often involves a complete teardown of the aircraft. Every plate and panel on the wings, tail, flaps, and rudder are unscrewed, and all the parts within—cables, brackets, bearings, and bolts—are removed for inspection. The landing gear is disassembled and checked for cracks, hydraulic leaks, and corrosion. The engines are removed and inspected for wear. Inside, the passenger seats, tray tables, overhead bins, carpeting, and side panels are removed until the cabin has been stripped down to bare metal. Then everything is put back exactly where it was, at least in theory.

The work is labor-intensive and complicated, and the technical manuals are written in English, the language of international aviation. According to regulations, in order to receive F.A.A. certification as a mechanic, a worker needs to be able to “read, speak, write, and comprehend spoken English.” Most of the mechanics in El Salvador and some other developing countries who take apart the big jets and then put them back together are unable to meet this standard. At Aeroman’s El Salvador facility, only one mechanic out of eight is F.A.A.-certified. At a major overhaul base used by United Airlines in China, the ratio is one F.A.A.-certified mechanic for every 31 non-certified mechanics. In contrast, back when U.S. airlines performed heavy maintenance at their own, domestic facilities, F.A.A.-certified mechanics far outnumbered everyone else. At American Airlines’ mammoth heavy-maintenance facility in Tulsa, certified mechanics outnumber the uncertified four to one. Because heavy maintenance is labor-intensive and offshore labor is cheap, there’s a perception that the work is unskilled. But that’s not true. If something as mundane as the tray of a tray table becomes unattached, the arms that hold it could easily turn into spears.

There are 731 foreign repair shops certified by the F.A.A. around the globe. How qualified are the mechanics in these hundreds of places? It’s very hard to check. In the past, when heavy maintenance was performed on United’s planes at a huge hangar at San Francisco International Airport, a government inspector could easily drive a few minutes from an office in the Bay Area to make a surprise inspection. Today that maintenance work is done in Beijing. The inspectors responsible for checking on how Chinese workers service airplanes are based in Los Angeles, 6,500 miles away.

Lack of proximity is only part of the problem. To inspect any foreign repair station, the F.A.A. first must obtain permission from the foreign government where the facility is located. Then, after a visa is granted, the U.S. must inform that government when the F.A.A. inspector will be coming. So much for the element of surprise—the very core of any inspection process. That inspections have had the heart torn out of them should come as no surprise. It is the pattern that has beset the regulation of drugs, food, and everything else.

What effect does all this offshoring have on the airworthiness of the fleet? No one gathers data systematically on this question—which is worrying in itself—but you don’t have to look far in government documents and news reports to find incidents that bring your senses to an upright and locked position. In 2011, an Air France Airbus A340 that had undergone a major overhaul at a maintenance facility used by U.S. and European airlines in Xiamen, China, flew for five days with 30 screws missing from one of its wings. The plane traveled first to Paris and then to Boston, where mechanics discovered the problem.

A year earlier, an Air France Boeing 747 that had undergone major maintenance at another Chinese facility was grounded after it was found that some of the plane’s exterior had been refinished with potentially flammable paint.

In 2013, yet another Air France aircraft, this one an Airbus A380 en route to Caracas from Paris, had to make an unscheduled landing in the Azores when all the toilets overflowed and two of the airplane’s high-frequency radios failed. The Air France pilots’ union said the incidents occurred on the airplane’s first commercial flight after heavy-maintenance work in China. The company that performed the work also does maintenance for American.

In 2009, a US Airways Boeing 737 jet carrying passengers from Omaha to Phoenix had to make an emergency landing in Denver when a high-pitched whistling sound in the cabin signaled that the seal around the main cabin door had begun to fail. It was later discovered that mechanics at Aeroman’s El Salvador facility had installed a key component of the door backward. 

In another incident, Aeroman mechanics crossed wires that connect the cockpit gauges and the airplane’s engines, a potentially catastrophic error that, in the words of a 2012 Congressional Research Service report, “could cause a pilot to shut down the wrong engine if engine trouble was suspected.”

In 2007, a China Airlines Boeing 737 took off from Taiwan and landed in Okinawa only to catch fire and explode shortly after taxiing to a gate. Miraculously, all 165 people on board escaped without serious injury. Investigators later concluded that during maintenance work in Taiwan mechanics had failed to attach a washer to part of the right wing assembly, allowing a bolt to come loose and puncture a fuel tank. China Airlines does maintenance work for about 20 other carriers.

Airline mechanics at U.S. airports who perform routine safety checks and maintenance tasks before an airplane takes off report that they are discovering slipshod work done by overseas repair shops. American Airlines mechanics contended in a lawsuit last January that they had been disciplined by management for reporting numerous safety violations they uncovered on airplanes that had recently been serviced in China. 

Mechanics in Dallas said they had discovered cracked engine pylons, defective doors, and expired oxygen canisters, damage that had simply been painted over, and missing equipment, among other violations. An American spokesperson denied the allegations, contending that the airline’s “maintenance programs, practices, procedures and overall compliance and safety are second to none.” Citing a lack of jurisdiction, a federal judge dismissed the lawsuit. The F.A.A., however, is investigating the allegations.

With huge subsidies, the Chinese government has created an aircraft-maintenance industry almost from scratch—building hangars, hiring mechanics, and aggressively courting airlines to have work done in the People’s Republic. Even engine repairs and overhaul—the highly skilled aircraft-maintenance work that has remained largely in the U.S. and Europe—may follow heavy maintenance to the developing world. 

In 2003, the inspector general called on the F.A.A. to require drug testing of workers at foreign repair stations as a condition of F.A.A. certification. Twelve years later, the agency still has no such requirement.

The reality is that from now on it’s going to be up to the airlines to police themselves. With the F.A.A. starved for funds, it will be left to the airlines to oversee the heavy maintenance of their aircraft. Have you noticed that this sort of arrangement never works? 

http://www.vanityfair.com/news/2015/11/airplane-maintenance-disturbing-truth