Jakarta — Indonesian investigators said on Monday more training was needed for Boeing 737 MAX pilots after discovering the situation believed to have faced the crew of a doomed Lion Air jet was not contained in the aircraft’s flight manual. The comments shed further light on the areas under scrutiny as investigators prepare to publish their preliminary report on November 28 or 29, one month after the Lion Air Boeing 737 MAX dived into the Java Sea, killing all 189 on board. Until now, public attention has focused mainly on potential maintenance problems including a faulty sensor for the “angle of attack”, a vital piece of data needed to help the aircraft fly at the right angle to the currents of air and prevent a stall. Now the investigation’s focus appears to be expanding to the clarity of US-approved procedures to help pilots prevent the 737 MAX over-reacting to such a data loss and methods for training them.

Soerjanto Tjahjono, head of Indonesia’s transportation safety comm...

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