Published: Fri, November 09, 2018
Markets | By Erika Turner

Another Lion Air Hit a Pole in Bengkulu; Pilot, Aircraft Grounded

Another Lion Air Hit a Pole in Bengkulu; Pilot, Aircraft Grounded

The directive points operators "to existing flight crew procedures to address circumstances where there is erroneous input from an AOA sensor", the statement said.

Boeing preparing to send a bulletin to operators of its new 737 Max models warning that erroneous readings from a flight-monitoring system can cause the planes to aggressively dive, said a person familiar with the matter.

A Lion Air plane's left wing crashed into a pole on the runway at Fatmawati Airport in Indonesia's Bengkulu city on Nov 7.

The problem with the planes is in the "angle of attack" sensor which calculates the position of the plane relative to the air current.

The Lion Air investigation comes after Indonesia's government ordered an inspection of all Boeing 737 Max 8 planes in the country.

Boeing has delivered 219 737 MAX jets to customers globally, with 4,564 orders for jets yet to be delivered.

The issue only occurs when a plane's autopilot is switched off, Boeing said. Following the protocol should be routine for well-trained pilots, though may be more challenging in the heat of the moment when equipment is malfunctioning and alarms are sounding.

Minutes after takeoff on October 29, a Boeing 737 Max belonging to the budget Indonesian carrier Lion Air dove into the Java Sea at more than 600 miles an hour, shattering into pieces and killing all 189 passengers and crew.

The planemaker said local aviation officials believed pilots may have been given wrong information by the plane's automated systems before the fatal crash.

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"The draft of what will be conveyed by Boeing this morning has been presented to us", said air accident investigator Nurcahyo Utomo.

Indonesian crash investigators have confirmed the 737 in the crash had technical faults on four flights previous to the one in which it plummeted into the sea shortly after take-off from Jakarta.

The plane plummeted into the Java Sea on Oct 29 en route to Pangkal Pinang from Jakarta, killing all 189 aboard.

Aircraft and engine manufacturers routinely send bulletins to air carriers noting safety measures and maintenance actions they should take, majority relatively routine. Capt Mohan Ranganathan, air safety expert, said, "If all AOA sensors are erroneous, it puts a big question mark on the air-worthiness of the aircraft".

Boeing, which manufactured the Lion Air plane, issues safety-related bulletins, and had previously circulated instructions about what flight crews should do if sensors fail.

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

Indonesia's search and rescue agency on Wednesday extended the search effort for a second time, saying it will continue until Sunday.

Rescuers are looking for the cockpit voice recorder, which will help explain what caused the crash.

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