Boeing to issue safety advice on 737 MAX after Indonesia crash

Rusdi Kirana
Rusdi Kirana
Author

07 November, 2018

The person, who wished to remain unnamed, noted that when pilots are manually flying Boeing 737 Maxes, the jet is prone to automatically push down the nose if the plane determines that an aerodynamic stall is imminent.

Data from the black box of the Lion Air 737 Max that fell into the sea with 189 people onboard has confirmed there was an issue with the plane's airspeed indicator.

The damage on a Lion Air jet that crashed into the sea, killing all 189 aboard, was revealed after data had been downloaded from the plane's flight data recorder, Indonesia's National Transportation Safety Committee (KNKT) chief Soerjanto Tjahjono told reporters on Monday.

But a Boeing statement said a safety bulletin, sent to airlines this week, directs flight crews to existing guidelines on how they should respond to erroneous "angle of attack" data.

"Angle of attack" refers to the angle between relative wind and a reference line on the plane - the sensors' goal is to ensure that air flows over an aircraft's wings, Bloomberg reported.

About 15 minutes into the flight, which took off from Jakarta, the plane plunged into the sea. There were no survivors.

At least 105 body bags containing body parts of the passengers have been handed to the disaster victim identification unit of the national police hospital in Jakarta.

The jet reported a discrepancy in its angle of attack sensor during a flight from Bali to Jakarta the day before it crashed. "Imagine if you were in our position", said Najib Fuquoni, a relative of a victim, demanding an independent investigation into the crash.

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The ministry had previously removed several Lion Air executives and technicians, saying they were needed to help authorities in the investigation.

Ony Soerjo Wibowo assessed that a commercial aircraft could indeed experience technical failures despite having gone through periodic checks as the Lion Air crash suggests.

An Air Canada Boeing 737 MAX 8 (C-FSJH) single-aisle narrow-body jet airliner airborne on short final approach for landing at Vancouver International Airport, Richmond, B.C. on Wednesday, August 29, 2018. The information can be critical in preventing the plane from stalling.

Indonesia's rescue agency said Sunday that wreckage spotted by divers had turned out to be only pieces of skin of the Boeing Co. jet rather than the main fuselage.

The technical log shows the airliner had reported an "unreliable" airspeed reading on four of the prior flights, investigators said.

Boeing's bulletin related only to the 737 MAX, the latest version of the world's most-sold family of aircraft, which has been in service for just over a year.

Tjahjono said the large amount of small debris and the relatively small area the debris was found in showed the plane hit the water at a very high speed.

The accident has resurrected concerns about Indonesia's poor air safety record, which until recently saw its carriers facing years-long bans from entering European Union and USA airspace.


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