Airservices is Australia's air navigation service provider - we provide air traffic control, aviation rescue and fire fighting and air navigation services.

Long term height-keeping performance monitoring

The ICAO Separation and Airspace Safety Panel (SASP) identified that height-keeping performance monitoring results for RVSM approved aircraft had, in some cases, demonstrated long-term adverse trends in altimetry system error (ASE) stability. The likely results of this trend, if not reversed, would be aircraft becoming non-compliant with RVSM requirements.

To ensure that adverse trends in ASE stability are detected, globally applicable RVSM long-term height monitoring requirements have been implemented. ICAO Annex 6 – Operation of Aircraft that detail global RVSM long-term monitoring requirements that became effective on 18 November 2010. These requirements are: 7.2.7 The State of the Operator that has issued an RVSM approval to an operator shall establish a requirement which ensures that two aeroplanes of each aircraft type grouping of the operator have their height keeping performance monitored, at least once every two years or within intervals of 1,000 flight hours per aeroplane, whichever period is longer. If an operator aircraft type grouping consists of a single aeroplane, monitoring of that aeroplane shall be accomplished within the specified period.

RVSM Minimum Monitoring Requirements (MMRs) have been adopted for global application by all ICAO Regional Monitoring Agencies (RMAs) and are the basis for implementation of the Annex 6 requirements. The MMR are located in:

The AAMA Aircraft Height Keeping Performance Monitoring databases contain information regarding date of last successful monitoring and date by which an operator is to have a specific airframe monitored in accordance with the MMR.

RVSM approved aircraft, as notified by CASA, are listed alphabetically by Operator. The Date of Last Monitoring information is received from ADS-B monitoring conducted by Airservices Australia, GMU monitoring conducted by approved support organisations or as advised by other Regional Monitoring Agencies. To assist operators with planning a forward date (based on two years from last successful monitoring) the To be Monitored by Date is provided. If this is not updated, in accordance with the MMR requirements, it will be flagged as Overdue.