Aviation safety investigations & reports

Breakdown of Separation, Boeing Co 747-438 & 767-300, VH-OJO & UR-VVF

Investigation number:
200506508
Status: Completed
Investigation completed

Summary

Download Final Report
[Download  PDF: 82KB]
 

The Boeing 747 (747) was cruising at FL320. The crew of the Boeing 767 (767) on a converging track, requested clearance to climb from FL300 to FL320. Yangon ATS cleared the 767 to climb. The 747 crew observed the 767 on TCAS at the same level as the 747 approximately three NM ahead. The Yangon ATS controller instructed the 747 crew to descend to FL310. The 747 was re-cleared to FL320 once the 767 had passed.

The occurrence was investigated by the State Administration of Ukraine for Aviation Safety Oversight. In accordance with para 5.23 of Annex 13 to the Convention on International Civil Aviation, ATSB appointed an Accredited Representative to assist the Ukrainian authority.

Download Final Report
[Download  PDF: 82KB]
 
 
 

Factual Information

On 21 December 2005, the State Administration of Ukraine for Aviation Safety Oversight (State Aviation Administration) notified the Australian Transport Safety Bureau (ATSB) that it was investigating an air safety occurrence involving an Australian registered and operated Boeing 747-438 (747) aircraft, registered VH-OJO, and a Ukrainian registered and operated Boeing 767-300 (767) aircraft, registered UR-VVF. The incident occurred in the Yangon Flight Information Region (FIR), Myanmar, on 3 December 2005.

The ATSB appointed an accredited representative to participate in the State Aviation Administration investigation into the occurrence, in accordance with clauses 5.18 1 and clause 5.23 2 of Annex 13 to the Convention on International Civil Aviation. To protect the information supplied to the State Aviation Administration, the ATSB initiated an investigation under the Transport Safety Investigation Act 2003. The report presented was prepared with information supplied to the ATSB. Reported times are referenced to Coordinated Universal Time (UTC).

The 747 was operating a scheduled service from Singapore to London, crossing the Yangon FIR at flight level (FL) 320, via airway route B463. Near position POXEM, the crew of the 767, which was on a converging track with that of the 747, requested a clearance to climb from FL300 to FL320. Yangon Air Traffic Services (ATS) cleared the 767 to climb to FL320.

At approximately 0020 the 747 crew observed the 767 on the aircraft's airborne collision avoidance system, approximately 3 NM ahead and at the same level as the 747. Yangon ATS instructed the crew of the 747 to descend to FL310. Once the 767 had passed, the 747 was re-cleared to FL320.

The State Aviation Administration is the independent Ukrainian government entity responsible for the investigation of accidents and incidents involving Ukrainian registered and operated aircraft. The ATSB accredited representative's role in the investigation has been to provide the State Aviation Administration with relevant information about the 747 and its operation and a record of the pilot's report into the incident. The State Aviation Administration will publish the final investigation report.


  1. The State of Registry, the State of the Operator, the State of Design and the State of Manufacture shall be entitled to appoint an accredited representative to participate in the investigation.
  2. Any State which on request provides information, facilities or experts to the State conducting the investigation shall be entitled to appoint an accredited representative to participate in the investigation.
General details
Date: 03 December 2005   Investigation status: Completed  
Time: 0020 UTC    
Location   (show map): Ukraine, POXEM (IFR)    
State: International   Occurrence type: Miscellaneous - Other  
Release date: 28 June 2006   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer The Boeing Company  
Aircraft model 747  
Aircraft registration VH-OJO  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Singapore  
Destination London  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer The Boeing Company  
Aircraft model 767  
Aircraft registration UR-VVF  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Last update 16 February 2016