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.
|Date:||10 August 2008||Investigation status:||Completed|
|Time:||2050 EST||Investigation level:||Complex - click for an explanation of investigation levels|
|Location:||Melbourne Airport 90deg M/22km|
|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 manufacturer||Embraer-Empresa Brasileira De Aeronautica|
|Aircraft model||ERJ 170|
|Type of operation||Air Transport High Capacity|
|Damage to aircraft||Nil|
|Departure point||Sydney, NSW|
|Departure time||1934 EST|
|Role||Class of licence||Hours on type||Hours total|