Aviation safety investigations & reports

Flight control system event, 22km east of Melbourne Airport, VIC, 10 August 2008, VH-ZHA, Embraer ERJ170-100

Investigation number:
Status: Completed
Investigation completed


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On 10 August 2008, an Embraer-Empresa Brasileira De Aeronautica ERJ170-100 aircraft, registered VH-ZHA, was being operated on a scheduled passenger service from Sydney NSW, to Melbourne Vic. While positioning for landing, the crew selected a 'flaps 1' setting and a number of caution messages appeared on the engine indicating and crew alerting system (EICAS) screen.

The aircraft operator found that the left number-3 slat actuator torque trip limiter had actuated enabling the caution messages to appear on the EICAS screen. The number-3 slat actuator was replaced. A strip and condition report did not identify any failure of the actuator and the failure was probably a result of operating in icing conditions. As a result of similar occurrences, the slat actuator manufacturer is re-designing the slat actuator seals.

Download Final Report
[Download  PDF: 235KB]
General details
Date: 10 August 2008   Investigation status: Completed  
Time: 2050 EST   Investigation level: Systemic - click for an explanation of investigation levels  
Location   (show map): Melbourne Airport 90deg M/22km    
State: Victoria   Occurrence type: Flight control systems  
Release date: 21 May 2009   Occurrence category: Serious Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Embraer-Empresa Brasileira De Aeronautica  
Aircraft model ERJ 170  
Aircraft registration VH-ZHA  
Serial number 17000180  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Sydney, NSW  
Departure time 1934 EST  
Destination Melbourne, Vic.  
Crew details
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL
Last update 03 April 2020