In the world of aviation maintenance, the C-Check is one of the most intensive and operationally critical stages in an aircraft’s lifecycle. For airlines, operators, and lessors alike, ensuring this process is executed with precision and accountability requires the active presence of a Technical Representative. This professional serves as the strategic link between the MRO (Maintenance, Repair & Overhaul) provider and the aircraft owner or operator, safeguarding technical compliance, financial accuracy, and schedule adherence.
At AEROPODA, our deep-rooted experience in aircraft asset management and maintenance oversight enables us to define and uphold industry best practices. In this article, we present a detailed perspective on what a C-Check Technical Representative must do before, during, and at the conclusion of a heavy maintenance visit.
“A C-Check isn’t just about turning wrenches—it’s about protecting asset value, enforcing contract terms, and ensuring every hour and dollar is accounted for. The Technical Representative is not just a witness to maintenance, but its most strategic controller.”
Phase I: Preparations Prior to Heavy Maintenance
1.Review of Heavy Maintenance & Lease Agreements
A technical representative must start by studying both the maintenance agreement and the aircraft lease contract in depth. Key focus areas include:
- Operator access rights at the MRO facility
- Hourly labor rates for over-CAP (Over & Above) work such as NDT, Engineering, and Special Services
- Cost control terms for materials, tooling, and component storage
- Rules around PMA parts, STC approvals, and use of maintenance reserves
Understanding these elements ensures there are no surprises in scope interpretation or invoicing.
2.Work Package Documentation Coordination
The representative should work closely with the Planning Engineer and CAMO team to ensure the work scope is fully defined, indexed, and traceable. This includes:
- Internal modifications or complex repairs with Part 21 backing
- All final task cards, EOs, SBs, ADs, and repairs
- Deferred item lists and MEL/CDL references
- Approved fluid usage statements
3.Aircraft Technical Documentation Handover
Technical representatives must confirm that all manuals, bulletins, and configuration data are delivered to the MRO. This includes:
- AMM, MPD, IPC, FIM, SRM, CMMs, MEL, and ETOPS data
- Dent & Buckle Chart, Paint Specifications, and STC/MOD documentation
- Latest AD/SB status, weighing reports, and layout documents (LOPA, EEL)
A complete and organized documentation set reduces delays and enhances technical clarity.
4. Material & Tools Control Planning
Prepare and review the material supply list for all tasks exceeding the CAP. Ensure daily coordination between operator and MRO logistics teams using a shared Material Supply Tracker with version control and live comments.
5. Stakeholder Contact Matrix
Ensure all departments (Engineering, Planning, Logistics, Customs) have assigned points of contact and that escalation paths are well defined.
6. Aircraft Technical Inspection
Before ferrying to the MRO, the Technical Rep must conduct an airworthiness review:
- Tire/brake condition checks
- Cabin and emergency equipment VCO inspections
- Dent & Buckle evaluation
- SRM compliance and, if needed, OEM concession for ferry flight
7. Travel Logistics
The rep should finalize their travel arrangements, including approvals, local transfers, hangar passes, and awareness of local regulations.
8. Pre-Input Meeting
A video or in-person pre-input meeting must be held with the MRO. Key points include:
- Critical path tasks
- Materials/tools readiness
- Deferred items and dent chart
- Paint and weighing requirements
- OEM access credentials (MyBoeingFleet, Airbus World)
- Project Gantt chart and report formats
9. Landing Permit Process
Coordinate the full set of documents required for landing approval at the MRO location, ensuring all certificates are valid through the scheduled RTS window.
Phase II: Actions During the Heavy Maintenance Visit
1. Technical Arrangements
Upon aircraft induction, the Technical Rep should oversee the removal and storage of galley equipment, emergency kits, and cockpit documentation. A joint walkthrough should be performed to log interior defects and plan rectification with MRO staff.
2. Documentation and Flight Data Tracking
Ensure the MRO has received and is using current documentation. Collect FH/FC, fuel quantity, ATL/CLB pages, and provide full operational histories for APU and engines.
3. Material Supply Oversight
Monitor material flow, component shortages, and coordination across both organizations. Enforce a common tracking file with strict comment preservation to avoid confusion and lost parts.
4. Routine Project Management
- Push for completion of inspection phase on time
- Monitor daily MH usage against the Gantt chart
- Ensure oil/fuel/hydraulic sampling is completed early
- Update D&B Chart and coordinate all critical repair tasks requiring OEM or Part 21 support
5. Status Reporting and Coordination
Regularly meet with the MRO and provide reports to Operator management, tracking:
- Completion of AD/SB/MODs
- LLP and HTC replacements
- Critical task performance (ETOPS, RII, CPCP, etc.)
- Component shipments (engines, LG, interior, etc.)
- Document closure rate and repair status
Phase III: Closing the Project
At the end of the maintenance event, the Technical Representative plays a critical role in securing regulatory and operational readiness:
- Collect all fuel-related documents and CRS
- Ensure updated navigation database and system setup
- Verify all cockpit documents, FAKs, and emergency equipment are returned to original locations
- Record all removed U/S parts and gather Form 1 documentation
- Coordinate return flight plan and catering if needed
- Audit the MRO invoice for discrepancies and challenge any overbilling on man-hours or materials
Conclusion: A Critical Role for Technical & Commercial Assurance
The presence of a qualified Technical Representative during a C-Check ensures more than just regulatory compliance—it protects the airline or lessor’s commercial interests, aircraft asset value, and operational readiness. From scope review to invoice validation, the rep must think ahead, act decisively, and document thoroughly.
At AEROPODA, our representatives follow structured checklists, regulatory frameworks, and proven operational playbooks developed from years of field experience. Whether you are a leasing company, operator, or owner, we offer comprehensive C-Check representation tailored to your aircraft type, jurisdiction, and commercial agreements.
Contact us today if you’re preparing for an upcoming heavy check and need experienced technical representation you can trust.
Below you can download a Tech Rep check list to make sure you are compliant with process.
Leave your comments if you find the check list helpful!
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