System of Maintenance (SOM) – CASA Delegate Approvals
Fast, compliant System of Maintenance (SOM) approvals for Charter, Aeromedical, Air Transport, Private and Corporate operators across Australia, approved directly by a CASA Delegate.
What is a System of Maintenance (SOM)?
A System of Maintenance (SOM) explains how your organisation manages aircraft maintenance so your fleet stays safe, reliable and compliant with CASA regulations. Instead of relying on generic schedules, a good SOM is tailored to your aircraft, your operation and the way you actually fly.
Why it matters:
Defines how and when maintenance is done
Aligns with CASA and manufacturer requirements
Supports airworthiness, reliability and safety
Fits charter, aeromedical, corporate, private and helicopter operations
System of Maintenance CASA Delegate Services
Development of a new SOM
Direen Aviation designs fully compliant Systems of Maintenance tailored to your aircraft, utilisation and operational needs. Ideal for new operators or fleet changes.
If you’re starting a new operation, or expanding your fleet, you’ll need a System of Maintenance that’s written clearly and fits the way you operate.
Direen Aviation develops SOMs that are easy to understand, compliant, and aligned with your aircraft’s maintenance schedules and operating environment.
We take into account:
How your aircraft are used
Manufacturer maintenance instructions
Your maintenance control processes and tracking systems
The real-world needs of your pilots, engineers and operations team
The result is a practical SOM that supports safe, reliable aircraft operations and meets all regulatory requirements.
Review and update an existing SOM
We update your SOM when maintenance requirements change, when your fleet grows or reduces, or when day-to-day experience shows the system needs improving
A System of Maintenance isn’t a “set and forget” document, it needs updating as your operation changes.
Direen Aviation can review your current SOM and make sure it stays accurate, practical and compliant with CAR 42.
An SOM usually needs updating when:
The aircraft manufacturer releases new or changed maintenance requirements
You add new aircraft to your fleet or remove existing ones
Operational experience shows that certain processes aren’t working as well as they could
Your maintenance control systems or procedures change
We go through your SOM, identify what needs updating, and rewrite or restructure sections so they make sense for the way you actually operate.
The updated SOM becomes clearer, easier to use and better aligned with the real maintenance needs of your aircraft and your team.
CASA Delegate Approval of a SOM
A Direen Aviation CASA Delegate can review and approve your SOM directly, eliminating the need for CASA submission and significantly reducing approval wait times.
Because Direen Aviation holds CASA Delegate authority, we can approve your System of Maintenance without needing to send it to CASA for processing.
This gives you a much faster and more direct approval pathway.
Our review and approval process follows CASA requirements, ensuring your SOM is clear, compliant and ready for use.
Whether you’re submitting a brand-new SOM or updating an existing one, Delegate approval helps you stay on schedule and avoid unnecessary downtime.
Direct CASA Delegate SOM Approval
A Direen Aviation CASA Delegate can develop, assess and approve your System of Maintenance (SOM) directly. This removes the need for separate CASA submissions, reduces delay and provides clear, fast regulatory outcomes for your operation.
✅ Direct SOM approvals
✅ Reduced admin and turnaround time
✅ Clear regulatory pathway