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The aircraft's crew requested a climb to a higher cruising altitude. The Flight Service Officer passed on the request to the responsible Air Traffic Control (ATC) Officer. The correct phraseology and verification procedures were not used between the two, and the aircraft was issued with a climb clearance before the ATC officer had determined that such a clearance was appropriate. The ATC officer subsequently issued a correct clearance and no conflictions resulted.

General details
Date: 29 July 1993 Investigation status: Completed 
Time: 23:50 WST  
 Investigation type: Occurrence Investigation 
 Occurrence type: Breakdown of co-ordination 
Release date: 19 June 1994 Occurrence class: Airspace 
Report status: Final Occurrence category: Incident 
Aircraft details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 767-238ER 
Aircraft registration: VH-EAK 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Jakarta, Indonesia
Destination:Sydney NSW
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Last update 19 April 2016