AW139 Helicopter

The AW139 is a Leonardo twin-engine helicopter with equipment and mission-configuration options. Maintenance depends on the approved aircraft documentation.

For AW139, the exact inspection programme must reflect the aircraft's model, configuration, registration and applicable aviation authority requirements.

Reference scope

• Aircraft and powerplant condition
• Flight and navigation equipment
• Landing gear, airframe and control systems
• Maintenance history, defect records and supporting documents

No aircraft-specific inspection interval or servicing instruction is asserted here.

Operational maintenance refers broadly to the checks, recordkeeping and coordination associated with routine aircraft use. The work is governed by the operator's approved documentation.

Common programme categories

• Aircraft handover and status review
• Assessment of open technical-record items
• Pre-operation and post-operation documentation
• Coordination of approved checks and authorised release to service

Applicable forms, time limits and sign-off authority must be established from the approved programme for AW139.

Maintenance activities for AW139 are established by its approved maintenance programme, with scope depending on the recorded condition and configuration of an individual aircraft.

Broad work areas

• Planning and technical-document review
• Condition and defect assessment
• Inspection and evaluation by appropriately authorised personnel
• Component repair or replacement when specified by approved data
• Completion of required records and release documentation

Inspection results and documentation for one aircraft should not be treated as evidence of the status of another.

Periodic maintenance comprises scheduled reviews and inspections undertaken according to the approved maintenance programme and the applicable aircraft and component records.

Information typically needed for a technical enquiry

• Exact AW139 variant and serial number
• Airframe and component utilisation records
• Current approved programme revision
• Outstanding inspections, findings and modification status
• Required certification and release documents

Calendar and utilisation limits must come from approved, current documentation rather than a general website profile.

When AW139 is taken out of regular operation, its storage and return-to-service requirements depend on the planned storage period, environmental conditions and approved maintenance instructions.

General planning topics

• Aircraft storage status and documentation
• Environmental exposure and site conditions
• Preservation requirements defined by approved data
• Scheduled inspections while out of service
• Airworthiness review before further operation

This is a general description, not a storage checklist or approved preservation procedure.

Special or unscheduled maintenance may be required when an aircraft experiences abnormal operating conditions or a reported event. The specific review is determined by applicable manufacturer and operator instructions.

Examples of events requiring an engineering assessment

• Abnormal loads or severe turbulence
• Suspected lightning strike
• Significant icing or adverse environmental exposure
• Reported hard landing or ground-handling incident
• Damage, unexpected faults or major component changes

Any inspection, disposition or release-to-service decision for AW139 must be made by authorised personnel using current, aircraft-specific data.