Notice of Proposed Rule Making - NPRM 1203OS
NPRM 1203OS - Extended Diversion Time Operations
The purpose of this NPRM is to propose amendments to CAO 82.0 in relation to EDTO threshold times and approvals, to implement ICAO SARPs for EDTO and align with international practice.
On 13 July 2007, amendments to subsection 3BC of CAO 82.0 – Distance were made to change the EDTO threshold time from 60 minutes to 90 minutes for twin turbine engined aeroplanes. This change was made with the expectation that ICAO, the New Zealand Civil Aviation Authority and the world’s major regulatory authorities would also be moving in this direction. This has not proven to be the case.
In March 2010, all operators of twin turbine engined aeroplanes certificated to carry more than 19 passengers or having a payload capacity exceeding 3410kg, were advised in writing of CASA’s intention to reduce the threshold time from 90 minutes to 60 minutes for these kinds of aeroplanes and the effects of these changes.
In 2011, ICAO advised all States of changes to Part I of Annex 6, Operation of Aircraft to the Convention on International Civil Aviation (the Chicago Convention) which became effective November 2012. The changes concerned revised Standards and Recommended Practices (SARPs) and guidance for EDTO. For extended range operations by aeroplanes with two turbine engines, there are no additional requirements. However, threshold and maximum diversion times are introduced for certain large three and four engine aeroplanes. For both twin engined aeroplanes and aeroplanes with more than two engines, ICAO leaves it to Contracting States to determine and specify specific threshold times in national legislation. The proposed amendments to CAO 82.0 specify threshold times of 60 minutes and 180 minutes, respectively.
In 2007, a transitional provision was introduced in CAO 82.0 (3BC.8) to permit operators with aircraft that meet certain conditions but that are not certificated beyond a 60 minute EDTO threshold time, to operate up to a 75 minute threshold time. This provision was drafted to expire at the end of 30 June 2015. This continues to be CASA policy. The proposed amendments to CAO 82.0 will remove the reference to the 75 minute threshold time. Operators affected by the withdrawal of this provision will be managed by exemption and/or updated CAO transitional arrangements until 30 June 2015. CASA does not intend to “grandfather” any such operations currently being conducted on an on-going basis beyond 30 June 2015.
CASA is also seeking to harmonise EDTO standards for large three and four turbine-engined aeroplanes with international practice. This includes specifying that the new standards apply only to three and four turbine engined aeroplanes manufactured on or after 1 July 2015.
How to respond
Comment period now closed.
Contact: Mal Read, Project Leader