Oversight of AOC holders
Operational and maintenance requirements for Air Operator Certificates.
The UK Civil Aviation Authority (CAA) conducts ongoing oversight of Air Operator Certificate (AOC) holders to ensure they continue to comply with applicable regulatory requirements and maintain safe operations. Oversight activities are designed to assess the effectiveness of the operator's management systems, operational performance, safety culture and continued compliance.
Following the grant of an AOC, operators are subject to ongoing oversight by the CAA. The scope and frequency of surveillance activities are determined using a risk-based approach that takes account of the size, complexity and performance of the organisation.
The CAA will maintain an oversight programme for each operator and conduct audits, inspections and other surveillance activities as necessary to assess continuing compliance with applicable operational requirements.
An annual oversight review will normally be conducted, including consideration of:
- the effectiveness of the management system
- the competence and suitability of nominated persons and key management personnel
- compliance monitoring activities
- safety performance and risk management
- operational performance and regulatory compliance
The CAA Oversight Manager will maintain regular engagement with the operator's Accountable Manager and other key personnel to discuss significant operational, safety and compliance matters.
Surveillance Activities
As part of the oversight programme, the CAA may conduct a range of surveillance activities, including:
Cabin Checks - Flight inspections to assess cabin operations and verify compliance with approved procedures and regulatory requirements.
Document Checks - Checks of aircraft, crew and operational records to assess continued compliance with applicable regulations and company procedures.
Flight Checks - Flight inspections to assess flight crew adherence to published procedures and approved operational practices.
Ground Checks - Inspections of ground operations and support functions, including:
- passenger handling
- baggage handling
- freight operations
- aircraft dispatch
- operational support facilities
Manual Reviews - Reviews of operational manuals and instructions to verify compliance with regulatory requirements and organisational processes.
Compliance Monitoring Reviews - Audits of the operator's compliance monitoring system to establish whether effective processes are in place to identify, assess and address compliance issues.
Ramp Inspections - Inspections conducted on aircraft during arrival or departure to assess compliance with operational, licensing and aircraft equipment requirements.
Training Oversight - Reviews of training systems, training records and training delivery conducted by, or on behalf of, the operator.
Safety Management System (SMS) Reviews - Assessment of the effectiveness of the operator's Safety Management System, including:
- hazard identification processes
- risk assessment activities
- safety performance monitoring
- safety assurance activities
- Safety Review Board outputs and actions
The operator remains responsible for ensuring the continuing airworthiness and safe operation of its aircraft, irrespective of any contracted maintenance or continuing airworthiness arrangements.
Where maintenance or continuing airworthiness activities are contracted to external organisations, the operator remains accountable for ensuring those arrangements are appropriately managed and monitored.
CAA oversight activities may include assessment of:
- continuing airworthiness management arrangements
- contracted maintenance support arrangements
- compliance with approved maintenance programmes
- maintenance planning and control processes
- technical records
- engineering procedures and manuals
- management of maintenance providers
- competence of nominated maintenance and continuing airworthiness personnel
The CAA will also assess the interface between operational and engineering functions to ensure that procedures remain effective and consistent across the organisation.
Where operators hold specific operational approvals or authorisations, oversight of these activities will form part of the operator's routine surveillance programme.
This may include oversight of operations such as:
- Low Visibility Operations (LVO)
- Performance Based Navigation (PBN)
- Reduced Vertical Separation Minimum (RVSM)
- Extended Range Operations with Two-engined Aeroplanes (ETOPS)
- Helicopter Operations with Night Vision Imaging Systems, or
- Other specialist operational approvals
Where significant safety concerns are identified, the CAA may take appropriate regulatory action, including the variation, suspension or revocation of approvals, authorisations or certificates where necessary.
Regulatory Action
Where oversight activities identify non-compliance or safety concerns, the CAA will work with the operator to ensure that corrective actions are implemented. Where deficiencies are significant or immediate safety concerns exist, the CAA may take formal regulatory action in accordance with its statutory responsibilities.