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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.

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General details
Date: 10 August 2008 Investigation status: Completed 
Time: 2050 EST  
Location   (show map):Melbourne Airport 90deg M/22km Investigation type: Occurrence Investigation 
State: Victoria Occurrence type: Flight control systems 
Release date: 21 May 2009 Occurrence class: Technical 
Report status: Final Occurrence category: Serious Incident 
 Highest injury level: None 
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
RoleClass of licenceHours on typeHours total
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Last update 14 November 2018