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When MCAS triggered again, the jetliner’s trim was set to push the nose down at almost the maximum level, flight data shows, while the control column noisily vibrated with another stall warning called a “stick shaker.”. This time, the pilots countered MCAS to greater effect, the experts said after studying the data. But when they turned off the system – as they were instructed to do by Boeing and the U.S. Federal Aviation Administration (FAA) in the wake of the Lion Air disaster – the nose was still trimmed downwards, making it harder to pull up the plane custom engraved cufflinks.

The combination of the plane’s speed – edging up towards design limits with the engines still at their take-off power – and the trim setting meant the pilots would have had to exert 50 pounds of force to pull back the control columns, the four experts and one of the pilots said, and moving a backup manual wheel instead was impossible. Ethiopian Airlines’ position is that the control problems only resulted from the crew’s losing battle with MCAS, a source familiar with the airline’s thinking said custom engraved cufflinks. Boeing declined to comment. The preliminary report did not cover this issue..

The captain called out “pull up” three times, according to the cockpit voice recorder. The co-pilot reported problems to air traffic control. In the meantime, the aircraft’s speed remained abnormally high, the five pilots and four aviation experts said. Several experienced pilots said there was an array of stressful factors sapping the pilots’ attention. Among the distractions was a “clacker” warning telling the pilots their aircraft was going too fast. This only kicked in after the MCAS system had started firing, the airline said custom engraved cufflinks.

“As pilots have told us, erroneous activation of the MCAS function can add to what is already a high-workload environment,” Muilenburg said Thursday, adding Boeing was “sorry for the lives lost” in the crash. “It’s our responsibility to eliminate this risk custom engraved cufflinks. We own it and we know how to do it.”. As the nose gradually fell, the captain asked the co-pilot to try to trim the plane using the manual backup wheel in the center console to help the plane recover from the dive, according to the voice recorder..

Data shows the electric trim system was switched back on in an apparent effort to force the reluctant nose higher, the experts said. This in turn would have also reconnected MCAS. Reactivating MCAS is contrary to advice issued by Boeing and the FAA after Lion Air. The report did not address that custom engraved cufflinks. The airline did not comment. The pilots managed to lift the nose slightly using the electric thumb switches on their control column. The data readout shows they flicked those switches only briefly. The report does not provide a reason for this. It does show the pilots fully engaged in trying to save the plane..