Boeing Co. received approval from the US air-safety regulators for fixes to an electrical issue that has grounded more than 100 of its 737 MAX jets, the company and a Federal Aviation Administration official stated that, paving the way for airlines to return them to passenger service within days.The regulatory approval supports in ending the latest embarrassing episode for Boeing, which has been battling with a series of engineering and quality issues that have affected various aircraft. It is also possible to ease frustrations among airlines that have planned to use their 737 MAX planes as travel demand picks up, following a sharp decline due to the coronavirus pandemic.Once the electrical fixes are finalised, the 109 affected jets, or roughly a quarter of the global MAX fleet, will be able to return to passenger service after being grounded since early April, according to the industry and FAA officials. The fixes defined the service bulletins to airlines are expected to take several days per plane to complete.