Aviation safety issues and actions
Interim Recommendation issued to: AirServices Australia
|Date issued:||23 April 1998|
|Safety action status:|
The Bureau of Air Safety Investigation recommends that
Airservices Australia review air traffic service procedures
relating to the combining of a number of operator positions and/or
frequencies with a view to reducing the impact of frequency
|Date issued:||11 November 1999|
|Response from:||AirServices Australia|
Reference is made to BASI's Air Safety Interim Recommendation No: IR 980059 regarding the use of ATS frequencies.
In addition to AIC H34/97, Airservices provides direction to ATS staff regarding the use of retransmit facilities in MATS 12-4-2 which shows "To reduce frequency congestion and interference on pilot broadcasts or other pilot-to-pilot communications being used for self separation, the retransmit facility should be operated in the "OFF" mode whenever practicable".
A number of other factors, in the context of the Airspace 2000 initiatives, relating to the provision of services are currently being discussed with CASA. Implementation of aspects of these initiatives would affect not only the way services are provided but the way in which ATS frequencies are used.
Airservices will continue to monitor the effects of retransmit facilities pending resolution of a number of issues associated with the implementation of CASA's Airspace 2000 initiatives.
The following letter was sent to Airservices Australia on 6 December 1999:
Subject: Outstanding airspace related safety actions
Responses to some previous safety recommendation to Airservices Australia and the Civil Aviation Safety Authority (CASA) proposed actions that were subject to the latter's Airspace 2000 initiative or the resolution of related issues.
Since the Minister of Transport and Regional Services' statement clarifying the roles and responsibilities for airspace management it has become apparent that, with the change in roles, CASA may not be in a position to implement all of their proposed airspace related safety actions. Consequently, there is the likelihood that there will be less safety enhancement of airspace than there previously might have been.
However, should Airservices Australia review the safety recommendations previously forwarded to CASA and the subsequent responses, during the development of the new airspace project, the knowledge gained from past air safety investigations has the potential to be retained. Consequently,the ATSB would appreciate Airservices consideration and advice of any subsequent proposed action, of interim recommendation (IR) 19970155 issued on 30 January 1998 and the CASA response of 25 August 1999 (both attached).
Similarly, advice of any proposed action in regard to
IR19960009, IR19980005 and IR19980059 issued to Airservices, where
further action was also subject to CASA's Airspace 2000, would
assist the ATSB in understanding the integration of safety lessons
with future airspace
|Date issued:||11 July 2000|
|Response from:||AirServices Australia|
|Response status:||Closed - Accepted|
I apologise for the late response to your letter dated the 6th of December 1999, concerning the resolution of matters relating to the Airspace 2000 initiative. We note the recent statement by the Minister for Transport and Regional Services, and its effect in clarifying the roles and responsibilities for airspace management.
In the current airspace management arrangements, Airservices holds the legislative responsibility for the declaration of airspace in accordance with the ICAO "alphabet" menu of airspace. Responsibility for procedures applicable within airspace classes, including Class G airspace, together with ongoing training and pilot education remains with the Civil Aviation Safety Authority.
In that context, we believe that Recommendation IR19970155, relating to separation assurance in Class G airspace is more properly directed to CASA.
In relation to Recommendations IR19960009, IR19980005 and IR19980059, I offer the following advice:
IR19980059: Whilst Airservices disagrees in part with the investigation report, the recommendation is accepted.
During the transition to TAAATS, Safety Cases have been conducted. These Safety Cases include consideration of a variety of hazards, including frequency congestion. This is particularly the case in relation to the current initiatives to absorb the provision of Directed Traffic Information services into TAAATS.
In relation to your statement regarding the integration of safety lessons with future airspace developments, Airservices is acutely aware of the primacy of safety in all aspects of our operations. In work being undertaken with industry to achieve reforms in the provision of services in low level airspace, detailed examination of hazards, potential mitigations, safety analysis and risk modelling are a fundamental part of our considerations. We would welcome the opportunity to provide you and your staff with a