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Lion Air 610

Printed page iv. PDF page 6.

of Attack failure .........................................................62 1.6.6.6 AOA Disagree Fault Isolation and Rectification Procedure.62 1.7 Meteorological Information.................................................................................64 1.8 Aids to
Open final report at PDF page 6Aircraft Accident Investigation Report KNKT.18.10.33.04

Lion Air 610

Printed page viii. PDF page 10.

PFD.........................................................................................44 Figure 9: AOA Disagree message on the PFD.....................................................................45 Figure 10: Horizontal Stabilizer movement ........................................
Open final report at PDF page 10Aircraft Accident Investigation Report KNKT.18.10.33.04

Lion Air 610

Printed page xviii. PDF page 20.

malfunctions, but did not include the activation of stick shaker and STAB TRIM to CUT OUT. The AOA DISAGREE alert was not available on the aircraft therefore, the flight crew did not report it. The reported problem would only be
Open final report at PDF page 20Aircraft Accident Investigation Report KNKT.18.10.33.04

Lion Air 610

Printed page 45. PDF page 47.

As shown in figure 9 the "AOA DISAGREE" message appears on the Captain and First Officer PFD when the values of the left and right AOA transmitted by the ADIRUs differ by 10� or more for 10 continuous seconds. T
Open final report at PDF page 47Aircraft Accident Investigation Report KNKT.18.10.33.04

Lion Air 610

Printed page 46. PDF page 48.

requirements and the software was identified, Boeing determined that the absence of the AOA DISAGREE alert did not adversely impact aircraft safety or operation. Accordingly, Boeing concluded that the existing functionality was acceptable until the originally intended func
Open final report at PDF page 48Aircraft Accident Investigation Report KNKT.18.10.33.04

Lion Air 610

Printed page 62. PDF page 64.

related to the AOA categorized as Observed Fault with the fault codes are as follows: AOA DISAGREE shows on PFD - captain's . . . . . . . . . . . . . . . . . .
Open final report at PDF page 64Aircraft Accident Investigation Report KNKT.18.10.33.04