MILITARY & DEFENSE Mechanics contaminated Air Force One planes, causing $4 million in damage and threat of fire  Adam Kredo, The Washington Free Beacon May 11, 2017, 4:01 PM 198,831  President Donald Trump departing Air Force One at Andrews Air Force Base on January 26.AP Photo/Jose Luis Magana Airline mechanics assigned to perform critical maintenance on the fleet of Air Force One planes used to fly President Donald Trump and previous presidents were caught using contaminated tools on the craft, causing more than $4 million in damage that could have caused a fire to break out on the plane, according to a federal investigation. Three mechanics working for Boeing, which has a contract to perform critical maintenance on the Air Force One fleet, "failed to observe explicit warnings" while attempting to clean the plane at a Boeing-owned plant in San Antonio, Texas. Boeing, which has caused a firestorm on Capitol Hill over its efforts to sell Iran billions of dollars' worth of planes that many suspect will be used to facilitate terrorism operations, caused more than $4 million in damage to the plane. The dangerous cleaning methods employed by the Boeing employees could have caused a fire to break out on board the plane, according to an investigation, which refers to the three employees in question as "Mishap Mechanics," or "MM."  The shoddy work took place during routine maintenance checks performed from April 1 to 10 last year. Three mechanics involved in the incident all were "assigned to the Presidential Airlift Squadron, Andrews Air Force Base, Maryland," according to the investigation. "The three Boeing mechanics were supporting the heavy maintenance contract between the United States Air Force and Boeing." Investigators found that "three factors substantially contributed to the mishap."  AP "First, MM2 failed to observe explicit warnings concerning cleanliness while performing tasks on the [plane's] oxygen system," according to the investigation. "Second, Boeing failed to exercise adequate oversight over the timeliness and quality of maintenance being performed on the [aircraft]. Lastly, MM1, MM2, and MM3 failed to absorb or retain oxygen system training and failed to apply cleanliness procedures while performing oxygen system maintenance."  As of Thursday, "the cost to remediate the known contamination of the oxygen system is over $4 million, which was paid for by Boeing," according to the investigation. "There were no injuries as a result of the mishap." A Boeing spokesman would not say whether the mechanics in question had been disciplined or fired, according to Defense One. "We did complete some investigations alongside our Air Force partners," Davis told the publication. "Collectively, we did some corrective action reports so that we can ensure we have exemplary performance in the future." MORE FROM THE WASHINGTON FREE BEACON: Miss USA Winner Angers Liberals With Health Care Answer Alt-Left Targets Ajit Pai George Jones’s Gospel Records Are Better Than ‘Sweetheart of the Rodeo’ Halper: Tapping Cornyn for FBI Head Would Make Situation Even More Political Haley: The Russians Have ‘Always Been Full of Themselves’ Get the latest Boeing stock price here. Read the original article on The Washington Free Beacon. Copyright 2017. Follow The Washington Free Beacon on Twitter. SEE ALSO: A SWAT team in Los Angeles shot and killed a suspect from a helicopter for the first time NOW WATCH: Here are 3 of the strangest projects DARPA has worked on since its creation  h Share This Post  Sponsored Links From The Web Play This for 1 Minute & See Why Everyone's Addicted Vikings: War of Clans Mobile App This Game Can Train Your Brain to Think Strategically (No Joke!) Get it on Google Play - Throne This app gets you speaking a new language in 3 weeks! Babbel Crazy Hotel Prices. Save70.com by Taboola Recommended For You  Silicon Valley's ultimate status symbol is the sneaker — here are the rare, expensive, and goofy sneakers worn by the top tech CEOs  Trump's loyalists are praising Comey's ouster as a blow against the 'deep state,' a far-right conspiracy  Fox News' Chris Wallace slams Trump for playing 'very dangerous game' with the press Powered by Sailthru More from Business Insider  North Korea says latest missile test was aimed at verifying the ability to carry a large nuclear warhead Jack Kim and Ju-min Park, Reuters 11h 3,571  The UN Security Council will hold urgent consultations on North Korea's latest missile test Associated Press 15h 2,470  North Korea fires ballistic missile days after new South Korea leader pledges dialogue Reuters and Michelle Mark May 13, 2017, 11:16 PM 21,311.   Yote hayo hapa hapa DIDAS BLOG NEWS