Final Report B735 (PK-CLC), en-route, NNW of Jakarta Indonesia, 9 January 2021

Final Report B735 (PK-CLC), en-route, NNW of Jakarta Indonesia, 9 January 2021

Publication info
Author
KNKT (Indonesia)
Category
Accident Reports Loss of Control Human Factors Airworthiness
Date of publication
10/11/2022

On 9 January 2021, a Boeing 737-500 was climbing though 10,700 feet less than five minutes after departing Jakarta in daylight when it began to descend at an increasing rate from which no recovery occurred and 23 seconds later was destroyed by sea surface impact killing all 62 occupants. The Investigation concluded that the departure from controlled flight was unintentional and the result of the pilots’ inattention to their primary flight instruments when, during a turn with the autopilot engaged, an autothrottle malfunction created apparently unrecognised thrust asymmetry which culminated in a wing drop and a consequent  loss of control.

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