Investigation number
AO-2023-042
Occurrence date
Location
77 NM west of Ballina Byron Gateway Airport
State
New South Wales
Report status
Pending
Investigation level
Short
Investigation type
Occurrence Investigation
Investigation phase
Examination and analysis
Investigation status
Active
Aviation occurrence type
Control issues
Occurrence category
Serious Incident
Highest injury level
None
Anticipated completion

The ATSB is investigating an in-flight upset involving a Boeing 737-8FE, registration VH-YQR, about 77 NM west of Ballina/Byron Gateway Airport, New South Wales on 6 September 2023.

Shortly before reaching cruise altitude, the aircraft's rudder trim was inadvertently activated, causing the aircraft to yaw and roll to the left. The pilot flying was controlling the aircraft through the autopilot and attempted to correct the roll through heading inputs. Shortly after, the autopilot was disconnected, and the aircraft returned to normal flight. An E/GPWS BANK ANGLE alert was triggered during the occurrence.

The evidence collection phase of the investigation will involve interviewing the flight crew, examining recorded flight data and the collection of other relevant evidence. 

A final report will be released at the conclusion of the investigation. Should a critical safety issue be identified during the investigation, the ATSB will immediately notify the relevant parties, so that appropriate safety action can be taken.

Aircraft Details
Departure point
Brisbane Airport
Destination
Melbourne Airport
Model
737-8FE
Serial number
41011
Sector
Jet
Registration
VH-YQR
Operation type
Part 121 Air transport operations - larger aeroplanes
Damage
Nil
Manufacturer
The Boeing Company
Aircraft Operator
Virgin Australia Airlines Pty Ltd