Aviation safety investigations & reports

Fuel imbalance involving Boeing 737, VH-VZT, near Esperance, Western Australia, on 25 October 2021

Investigation number:
Status: Active
Investigation in progress


The ATSB has commenced a transport safety investigation into a fuel imbalance occurrence involving a Boeing 737, registration VH-VZT, near Esperance, Western Australia, on 25 October 2021.

The aircraft was being operated on a regular public transport flight from Perth, Western Australia to Adelaide, South Australia with 6 crew and 88 passengers on board.

During cruise, the flight crew received a fuel imbalance warning. During completion of the associated checklists, the flight crew conducted a precautionary shutdown of the affected engine. The aircraft was diverted to Kalgoorlie-Boulder Airport, Western Australia and landed without further incident.

The evidence collection phase of the investigation will include interviewing the flight crew, reviewing recorded flight data, and examination of maintenance records and other relevant evidence. A report will be published at the conclusion of the investigation.

Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify relevant parties, so that appropriate safety action can be taken.

General details
Date: 25 October 2021   Investigation status: Active  
Time: 10:10 UTC   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): Overhead Esperence   Investigation phase: Evidence collection  
State: Western Australia   Occurrence type: Fuel systems  
  Occurrence category: Serious Incident  
Report status: Pending   Highest injury level: None  
Anticipated completion: 2nd Quarter 2022    

Aircraft details

Aircraft details
Aircraft manufacturer The Boeing Company  
Aircraft model 737-838  
Aircraft registration VH-VZT  
Serial number 34186  
Operator Qantas  
Type of operation Air Transport High Capacity  
Sector Jet  
Damage to aircraft Nil  
Departure point Perth Aerodrome  
Destination Adelaide Aerodrome  
Last update 27 October 2021