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WASHINGTON — Boeing issued a technical bulletin to airlines reminding them to ensure pilots closely monitor the airplane’s state and flight path to prevent a loss of control in flight, according to a document seen by Reuters.
The bulletin, dated on Monday, was sent after Indonesia issued a preliminary report into a Jan 9 Sriwijaya Air crash that killed all 62 on board.
It was not explicitly linked to that crash and covers all modern Boeing models but it addresses one of the potential areas of interest for investigators following the accident, pending the discovery of the cockpit voice recorder memory unit.
“Continual crew awareness of airplane attitude, airspeed, flight control position and thrust settings is fundamental for airplane upset prevention and can reduce the effect of startle or surprise caused by rapid unexpected changes,” the bulletin said.
Manufacturers have periodically issued such reminders and Boeing said it regularly communicates with customers on how they can safely and confidently operate airplanes.
“These latest communications reinforce the importance of industrywide and Boeing guidance and training materials on aircraft upset prevention and recovery,” Boeing said.
Bloomberg first reported on the issuance of the bulletin. Boeing, which was criticized for blaming pilots over a 2018 737 Max crash in Indonesia later tied to a faulty system, has not issued any comment on the causes of the Sriwijaya crash.
An industrywide safety analysis issued by Airbus SE last year said loss of control in-flight represents the largest category — or 33 percent — of all accidents since the start of the jet age.
Safety experts caution it is too early to say what caused the Sriwijaya crash. Most accidents are caused by a chain of separate factors. The Sriwijaya preliminary report found the plane had an imbalance in engine thrust that eventually led it into a sharp roll and then a final dive into the sea.
The corruption trial of Rosmah Mansor, wife of ex-prime minister Najib Razak, will proceed after a judge ruled on Thursday that prosecutors had presented sufficient evidence to make a case. Notorious for her overseas shopping trips and vast collection of handbags, she became a rod for public anger as her husband’s government was engulfed by graft allegations.