Lion Air Crash Update: Boeing Issues Operations Manual Bulletin

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Last week, I wrote about the Lion Air flight 610 that crashed into the Java Sea nearly 15 minutes after takeoff. None of the 189 passengers and crewmembers survived the accident. Search and Recovery crews were immediately onsite. Two after the crash, crews detected pings from one of the aircraft’s underwater acoustic beacons. This led to the recovery of the aircraft’s Flight Data Recorder (FDR). Data extracted from the FDR revealed that the last four flights of the downed aircraft experienced problems with at least one of the airspeed indicators.


In response to the information received from the FDR data, Boeing released the following statement in regards to Operations Manual usage:

Boeing is providing support and technical assistance to the Indonesian National Transportation Safety Committee and other government authorities responsible for the investigation into Lion Air flight 610.

The Indonesian National Transportation Safety Committee has indicated that Lion Air flight 610 experienced erroneous input from one of its AOA (Angle of Attack) sensors. 

Whenever appropriate, Boeing, as part of its usual processes, issues bulletins or makes recommendations regarding the operation of its aircraft. 

On November 6, 2018, Boeing issued an Operations Manual Bulletin (OMB) directing operators to existing flight crew procedures to address circumstances where there is erroneous input from an AOA sensor. 

The investigation into Lion Air flight 610 is ongoing and Boeing continues to cooperate fully and provide technical assistance at the request and under the direction of government authorities investigating the accident.

Final Word

I do not want to offer conjecture on this unfortunate incident as information is limited. The recovery of the Cockpit Voice Recorder would assist Boeing and Indonesia’s National Transportation Safety Committee in their efforts to understand what happened on that flight.

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