Boeing resumed 737 Max deliveries after the Federal Aviation Administration (FAA) lifted the type’s grounding in November 2020.
“Last night, Boeing notified us of a potential production issue with a component in the electrical power system on 17 of our most recently delivered Boeing 737 Max,” American says. “At Boeing’s direction, we have temporarily removed these 17 aircraft from service in order to complete necessary inspections and make any changes recommended or required by Boeing or the Federal Aviation Administration.”
Another 24 of American’s 737 Max “are not affected by this issue, as they were produced and delivered prior to the un-grounding”, American says. “We will continue to work with the FAA, Boeing and our union leaders and their safety teams as a thorough assessment of the issue is completed.”
Boeing disclosed on 9 April that it had recommended that 16 airlines “address a potential electrical issue in a specific group of 737 Max airplanes prior to further operations”.
...you couldn't make it up
Last Edit: Apr 11, 2021 8:09:47 GMT 1 by fanairbus
An FAA official confirmed that the agency had approved the service bulletins and associated instructions. Boeing sent two bulletins to air carriers on Wednesday on the fixes.
“After gaining final approvals from the FAA, we have issued service bulletins for the affected fleet,” Boeing told Reuters. “We are also completing the work as we prepare to resume deliveries.” Reuters reported on May 4 that the FAA asked Boeing to supply fresh analysis showing numerous 737 MAX subsystems would not be affected by electrical grounding issues first flagged in three areas of the jet in April. The electrical issue emerged after Boeing changed a manufacturing method as it worked to speed up production of the jetliner, a third person said. A fourth person said the change improved a hole-drilling process. Airlines pulled dozens of 737 MAX jets from service in early April after Boeing warned of the electrical problem, linked to a backup power control unit in the cockpit on some recently built airplanes. The problem, which also halted delivery of new planes, was then found in two other places on the flight deck, including the storage rack where the control unit is kept and the instrument panel facing the pilots.
The FAA said other carriers affected include Cayman Airways, Copa Airlines, GOL Linhas Aereas, Iceland Air, Minsheng Leasing, Neos Air, Shanding Airlines, SilkAir, Spice Jet, Sunwing Airlines, TUI, Turkish Airlines, Valla Jets Limited, WestJet Airlines and Xiamen Airlines.
Last Edit: May 13, 2021 11:08:07 GMT 1 by Ravi1925
Between June 2015 and April 2019, Boeing installed defective head-up guidance systems made by supplier Rockwell Collins on 618 Boeing 737 NGs and 173 Boeing 737 MAXs.
These are systems that display the jet’s key instrument readings on a glass panel in front of the pilot’s face so that they can be read at critical moments — such as when coming in to land — without the need for the pilot to look down at the main instrument panel. Such systems are typically optional extras ordered by premium airlines, including many U.S. carriers.
The FAA said the Rockwell head-up display systems were equipped with sensors that had not been tested or approved.
Even though the systems were therefore not in conformance with the production certificate, Boeing certified the aircraft as airworthy and delivered them to airlines.
Moveable slats on the wing
The second violation cites Boeing for installing defective slat tracks on the leading edges of the wings of 178 MAXs and 133 NG models and failing to oversee the quality assurance system at the suppliers of the slat track system.
The slat tracks guide the movable control surfaces on the leading edge of an airplane’s wings that slide out during takeoff and landing. Kencoa informed Spirit of the problem on Aug. 3, 2018, and Spirit told Boeing on Sept. 11, 2018. Yet through early March 2019, when the MAX was grounded worldwide after the second deadly crash, Boeing certified the planes as airworthy and delivered them to airlines.
Insane was the first word coming to my mind when reading this.