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On 15 January 2013, at about 1500 Coordinated Universal Time (UTC), a Cessna Citation 750, registered VH-RCA departed Faleolo International Airport, Samoa for Sydney Airport, New South Wales, with two flight crew and five passengers on board. About 1 hour 35 minutes into the flight the crew received a WSHLD HEAT INOP L (windshield heat inoperative left) message on the engine-indicating and crew-alert system (EICAS) and approximately 2 minutes later the windshield outer ply shattered with a loud bang. An immediate descent was commenced along with a turn towards Nadi International Airport, Fiji. The flight continued to Nadi without further incident and there were no injuries to passengers or crew.

The manufacturer reported that they had experienced two reliability issues with the windshield part number installed on the aircraft (9914380-11/-12). It was likely that the electrically heated windshield had been affected by moisture ingress resulting in a degradation of the electrical connection between the bus bar and the heating film. Changes to the windshield to address the issue were incorporated into part number 9914380-13/-14. There have been no reported cases of either of the failure modes in the -13/-14 windshields.

While the failure of the windshield involved the outer pane only, and did not result in a depressurisation, the precautions taken by the flight crew to descend to a lower altitude and diversion to the alternate airport highlighted the importance of good flight planning.

 

Aviation Short Investigation Bulletin – Issue 17

 

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General details
Date: 15 January 2013 Investigation status: Completed 
Time: 1500 UTC Investigation type: Occurrence Investigation 
Location   (show map):460 km SE of Nadi, Fiji Occurrence type:Windows 
State: International Occurrence class: Technical 
Release date: 23 April 2013 Occurrence category: Incident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 750 
Aircraft registration: VH-RCA 
Serial number: 750-0012 
Type of operation: Aerial Work 
Damage to aircraft: Minor 
Departure point:Apia, Samoa
Destination:Sydney, NSW
 
 
 
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Last update 06 June 2014