We have opened consultation on proposed amendments to Part 121 Manual of Standards (MOS) to replace expiring provisions and propose changes to performance and alternate aerodrome planning requirements.
Date
Proposed amendments include:
- Maintaining a consistent approach to aviation rescue and firefighting services (ARFFS) at Australian aerodromes - the requirement for ARFFS to be planned at alternate aerodromes as enroute alternate for extended diversion time operations (EDTO) will not be introduced.
- Replacing transitional RNP-based engine-out departure procedure (EODP) obstacle assessment area (OAA) requirements for operators with highly capable aeroplanes.
- Permitting reduced pre-flight destination aerodrome wet or contaminated pre-flight landing performance where an alternate aerodrome is planned.
- Limiting alternate aerodrome minima to be no higher than destination aerodrome minima.
- Improving alternate aerodrome minima requirements by adding an extra item to the alternate aerodrome minima table.
- Allowing isolated destination aerodromes to be planned to have a destination alternate aerodrome.
- Aligning instrument approach classifications to reflect updated Part 91 MOS changes.
- Amending the definition of TAWS Class-A and TAWS Class-B to permit an earlier version of the technical specification.
Feedback can be given via CASA’s Consultation hub and closes 10 November 2025.