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Safety Action

Summary

Following investigation of the procedures relating to the use of "alerted see and avoid" and the provision and issuance of traffic information by air traffic services the Bureau of Air Safety Investigation issued interim recommendations (IR) 970175 on 30 January 1998 and IR980005, IR980020 and IR980021 on 25 March 1998 to Airservices Australia. Also, IR970155 was issued on 30 January 1998 to the Civil Aviation Safety Authority.

Subsequently, Airservices Australia responded to IR970175 in a letter dated 17 March 1998 and to IR980005, IR980020 and IR980021 in a letter dated 27 May 1998. The recommendations and the respective responses were:

IR970175
The Bureau of Air Safety Investigation recommends that Airservices Australia in conjunction with the Civil Aviation Safety Authority:

Review aviation regulations and instructions, with the aim of maximising the use of "separation assurance" procedures in conjunction with "alerted see-and-avoid" procedures by pilots of flights in Class G airspace.

The Airservices Australia letter stated:

"Reference is made to your letter of 30 January 1998 regarding BASI Interim recommendation IR970175. This Interim Recommendation more properly falls within the province of CASA to provide further guidance within the AIP about broadcast arrangements for aircraft leaving controlled airspace into uncontrolled airspace and should be addressed by CASA.

"However, inclusion of text similar to that at OPS CTL - 1 paragraph 14.2 "When determining when to make broadcasts on the Area VHF, the pilot should consider the performance of the aircraft and the possibility of frequency congestion, if the airspace is known to be busy "would appear appropriate in the NCTL section to reinforce the need for timely broadcasts to be made in these circumstances. Airservices would, therefore support the intent of the BASI recommendation."

Response classification: CLOSED-ACCEPTED

IR980005

The Bureau of Air Safety Investigation recommends that Airservices Australia review the guidance in the MATS for the passing of traffic information by ATS personnel to ensure pilots have adequate time to assess the potential for conflict with other aircraft.

The Airservices Australia letter stated:

"Airservices maintains an ongoing process of reviewing the content of MATS and in line with this recommendation the issue of flight progress strip presentation will be reviewed. I must point out that with the advent of the Advanced Australian Air Traffic System (TAAATS) and associated 'Stripless- environment, presentation of traffic conflict and alerts will be vastly different to that which is currently employed. ATS Operational Policy Branch is developing comprehensive procedures for processing traffic information under the new environment."

Response classification: OPEN

IR980020
The Bureau of Air Safety Investigation recommends that Airservices Australia review the MATS in relation to flight progress strip annotations, to assist ATS personnel to provide more timely traffic information to flight crew.

The Airservices Australia letter stated:

"Airservices has revised the methodology and parameters for passing traffic information in its "proposal to amend G Airspace procedures- originally planned for introduction on 16 July 1998. This procedure amendment has been deferred until later in 1998 to facilitate further consultation and development."

Response classification: OPEN

IR980021
The Bureau of Air Safety Investigation recommends that Airservices Australia review ATS proficiency and continuation training requirements with a view to personnel undertaking specific traffic information simulator training on a regular basis.

The Airservices Australia letter stated:

"Airservices has developed its refresher training program for delivery to operational Air Traffic Services officers to emphasise elements dealing with the provision of traffic information and actions to be taken when separation has or may have been compromised."

Response classification: OPEN

IR970155
The Bureau of Air Safety Investigation recommends that the Civil Aviation Safety Authority in conjunction with Airservices Australia:

Review aviation regulations and instructions, with the aim of maximising the use of "separation assurance" procedures of maximising the use of "separation assurance" procedures in conjunction with "alerted see-and-avoid" procedures by pilots of flights in Class G airspace.

The Bureau of Air Safety Investigation further recommends that the Civil Aviation Safety Authority:

Implement an education program for pilots to promote the use of "separation assurance" procedures in Class G airspace.

Local safety action

As a result of the investigation, the companies involved have revised their procedures in relation to radio communications by crews when transiting from controlled airspace into non-controlled airspace.

 
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