Investigation number
AO-2024-003
Occurrence date
Location
180 km north-east of Kalgoorlie-Boulder Airport
State
Western Australia
Report status
Pending
Investigation level
Short
Investigation type
Occurrence Investigation
Investigation phase
Evidence collection
Investigation status
Active
Aviation occurrence type
Control issues
Occurrence category
Incident
Highest injury level
None
Anticipated completion

The ATSB is investigating a control issue involving a Raytheon Aircraft Company C90A, registered VH-JEO, at 180 km north-east of Kalgoorlie-Boulder Airport, Western Australia, on 25 January 2024.

During cruise while in instrument meteorological conditions (IMC), the horizontal situation indicator (HSI) failed, resulting in a continuous and uncommanded right turn. The pilot disengaged the autopilot and hand flew the aircraft resulting in minor controllability issues. The aircraft was returned to Kalgoorlie and the post-flight engineering inspection confirmed a failed left HSI remote gyroscope. 

The evidence collection phase of the investigation will involve interviewing the pilot, reviewing recorded data, and the collection of other relevant information.

A final report will be released 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.

Aircraft Details
Departure point
Kalgoorlie-Boulder Aerodrome
Destination
Warburton Aerodrome
Model
C90A
Serial number
LJ-1464
Sector
Turboprop
Registration
VH-JEO
Operation type
Part 135 Air transport operations - smaller aeroplanes
Damage
Nil
Manufacturer
Raytheon Aircraft Company
Aircraft Operator
Goldfields Air Services