Tolong jelaskan mengenai Controversy dari Allegiant Air

Flight attendants at the carrier voted to organize their workgroup under the Transport Workers Union of America in December 2010, citing scheduling concerns among other issues in their work rules, and the airline's pilots elected to vote on whether to join the International Brotherhood of Teamsters in July 2012. In August 2012, the pilots voted to organize and joined the Teamsters. Allegiant's chairman and CEO, Maurice J. Gallagher Jr., has been critical of the unionization of airline employees, and has stated, "Unionization is one of those things that clogs the arteries and makes you less quick and not as nimble as you need to be on top of your game... In this industry and others that are heavily unionized, you ultimately end up with bankruptcy as the primary driver."

Safety concerns over former MD-80 fleet

Allegiant Air has been closely monitored by the FAA due to many emergency landings and aborted takeoffs. ABC interviewed a former Allegiant mechanic, who said "Dedicated steps were not being performed with maintenance manuals or even with general practices, before an aircraft is released." A survey found that 46 of the company's 86 aircraft had made emergency landings, all of which involved MD-80s. The average age of Allegiant's MD-80 fleet was 29 years, compared to less than 13 years for its Airbus fleet.  all of its MD-80s have been replaced by newer Airbus A320 family aircraft.

In May 2016, the FAA confirmed they moved up a regularly scheduled five-year inspection. Allegiant Air proclaims the FAA gave them a clean bill of health after the 2016 audit.

In November 2016 the Tampa Bay Times noted that Allegiant's planes were four times more likely to have in-flight failures than other major US airlines, and a 60 Minutes report by CBS News in 2018 continued to investigate the issues. Public records cited in the investigation found that the airline had more than 100 serious mechanical incidents between January 1, 2016, and October 31, 2017, including "mid-air engine failures, smoke and fumes in the cabin, rapid descents, flight control malfunctions, hydraulic leaks and aborted takeoffs." Other public records further revealed that Allegiant aircraft, on average, were nearly three and a half times more likely to have mid-air breakdowns than American, United, Delta, JetBlue and Spirit. Allegiant responded to the investigation stating that many of the issues occurred on their older MD-80 model aircraft which have since been replaced with Airbus A320, and also defended its safety record, citing the 2016 FAA audit, which found the company's safety issues "minor" and "non-systemic."