FAA issues airworthiness directive after Indonesia plane crash

The sister of Hizkia Jorry Saroinsong a passenger on the Lion Air flight carries her brother's portrait during his funeral in Jakarta

The sister of Hizkia Jorry Saroinsong a passenger on the Lion Air flight carries her brother's portrait during his funeral in Jakarta

Boeing has signalled there could be a problem with the flight control system of its 737 Max 8 jet after one of the new airliners crashed, killing 189 passengers.

Boeing said that the warning directs operators to "existing flight crew procedures to address circumstances where there is erroneous input from an AOA sensor".

The FAA has issued a new airworthiness directive (AD) on the Boeing 737 MAX after Lion Air flight JT610 crash investigators found the aircraft's angle of attack (AOA) sensors are capable of generating erroneous inputs, potentially making the aircraft hard for pilots to control.

Indonesian investigators on Wednesday said the sensor was replaced on the Lion Air plane the day before its fatal flight and may have compounded other problems with the aircraft. If the angle is too high as a plane climbs, that would cause a stall.

If this happens (un-commanded nose-down stabilizer trim) pilots can respond by pushing a switch on their control column (yoke), however, 737's computers will resume trying to dive as soon as the switch is released the new Boeing bulletin said.

The FAA says the AD is an interim action, and "if final action is later identified, we might consider further rulemaking then".

Through September, Boeing has taken orders for 4,783 737 MAX aircraft with 219 delivered to customers.

Lion Air's first two attempts to address the airspeed indicator problem did not work, and for the Boeing 737 MAX 8 plane's second-to-last flight on October 28, the angle of attack sensors were replaced, Mr Tjahjono said.

An overview of the 737 MAX flight manual revision being issued by the FAA.

The committee has said they were dealing with an "erroneous airspeed indication".

Speaking on condition of anonymity, a source told Reuters that the Boeing bulletin related only to the 737 MAX, of which there are just over 200 in service.

The pilots union at Southwest Airlines Co., the biggest customer of the 737 Max, hasn't received any reports from its members of problems with faulty sensor readings, said Jon Weaks, president of the Southwest Airlines Pilots Association.

The US-based aircraft manufacturer plans to warn operators that these jets can abruptly dive because of "erroneous readings from a flight-monitoring system", according to the outlet.

Batik Air passenger Romidi Karnawan told CNN Indonesia that his flight to Jakarta, which was scheduled to take off at around 6pm, was delayed for about an hour.

Body parts are still being recovered and divers continue to hunt for the cockpit voice recorder.

Certainly, Indonesian search and rescue officials had trouble locating the wreck, despite encountering a large amount of wreckage in the four days leading up to the discovery of the fuselage.

Lion Air is one of Indonesia's youngest and largest airlines, flying to dozens of destinations at home and internationally.

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