Aviation safety investigations & reports

British Aerospace Plc BAe 146-300 , VH-EWM

Investigation number:
199802426
Status: Completed
Investigation completed

Summary

While flying a coupled instrument landing system (ILS) approach to runway 35 at Canberra, the crew received a ground proximity warning system (GPWS) "terrain" warning at 470 ft above ground level. As the aircraft was in visual conditions at the time, the crew elected to continue the approach.

The crew reported that, at the time of the warning, the aircraft was established on the ILS glideslope and descending at 650 ft/min. However, the T-VASIS indicated one dot low. Immediately prior to the warning, the radio altimeter indication rapidly increased, and then decreased, apparently triggering the warning.

Safety Action

This occurrence was one of 12 similar occurrences which involved GPWS warnings to crews of BAe146-300 aircraft at the same position on the runway 35 ILS final approach at Canberra. As a result, the Bureau of Air Safety Investigation is currently investigating a perceived safety deficiency related to these warnings. Any safety output issued as a result of this analysis will be published in the Bureau's Quarterly Safety Deficiency Report.

General details
Date: 19 June 1998   Investigation status: Completed  
Time: 0815 hours EST    
Location   (show map): Canberra, (ILS)    
State: Australian Capital Territory   Occurrence type: E/GPWS warning  
Release date: 01 January 1999   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer British Aerospace PLC  
Aircraft model BAe 146  
Aircraft registration VH-EWM  
Serial number E3179  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Brisbane, QLD  
Destination Canberra, ACT  
Last update 13 May 2014