Investigation number
AO-2022-033
Occurrence date
Location
about 167 km west of Meekatharra Airport
State
Western Australia
Report status
Pending
Investigation level
Short
Investigation type
Occurrence Investigation
Investigation phase
Final report: Internal review
Investigation status
Active
Aviation occurrence type
Avionics/flight instruments
Occurrence category
Incident
Anticipated completion

The Australian Transport Safety Bureau (ATSB) is investigating an unreliable airspeed and altitude indications involving a Boeing 737-476SF, registered ZK-TLJ, that occurred on a flight out of Perth Airport, Western Australia, on 10 June 2022.

During the cruise, the flight crew noted a discrepancy between the captain and first officer’s indicated altitude, indicated airspeed, and Mach number. After consulting maintenance watch, the flight crew elected to return to Perth Airport.

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

Aircraft Details
Departure point
Perth Airport, Western Australia
Destination
Christmas Island Airport, Christmas Island
Model
737-476SF
Serial number
24432 LN:1879
Sector
Jet
Registration
ZK-TLJ
Operation type
Part 129 Foreign air transport operators
Damage
Nil
Manufacturer
The Boeing Company
Aircraft Operator
AIRWORKS HOLDING LIMITED