Is your engine on an ESP™ maintenance program?

Overhaul means the engine or engine module disassembly, non-destructive testing, inspection of all components and accessories, the repair or replacement of defective parts, re-assembly and testing of the engine or engine module, all in accordance with the applicable P&WC overhaul manuals. Refurbishment means the services necessary to restore an engine or engine module, maintained in accordance with P&WC’s approved on-condition program, to a serviceable condition sufficient to enable the Engine to continue to the next refurbishment.

HSI is the removal and inspection of an Engine’s combustion and turbine section Components, and the repair or replacement of deteriorated Components in compliance with the applicable Engine maintenance manual inspection criteria or in-service inspection criteria as deemed applicable.

Scheduled maintenance activities necessary to restore an Engine or Engine Module, maintained in accordance with P&WC’s approved on-Condition program, to a serviceable condition sufficient to enable the Engine to continue to the next Refurbishment.

A BUER repair refers to the removal of an aircraft engine outside of scheduled maintenance intervals to address limited-scope issues that prevent the engine from continuing safe or reliable operation. BUER repairs focus on correcting specific, identifiable faults without performing a full overhaul or major refurbishment.

BUAR refers to the unscheduled removal, replacement, or repair of engine-mounted accessories or line‑replaceable units that are found to be faulty, degraded, or non‑functional while the engine remains installed on the aircraft. BUAR covers limited‑scope, corrective actions required to restore normal operation of the affected accessory without involving core engine disassembly or major maintenance.

The diagnostic effort required to identify, isolate, and determine the cause of a reported fault, abnormal condition, or performance issue in an engine, accessory, or related system. It includes the time and technical work performed by qualified personnel to investigate symptoms and confirm the corrective action needed.

The process of implementing the instructions, modifications, inspections, or corrective actions specified in a P&WC Service Bulletin (SB). This work is carried out to ensure the engine or related component complies with the technical guidance, improvements, safety recommendations, or reliability enhancements contained in the SB. 

The provision, management, and maintenance support of spare or replacement engines supplied to an operator under a lease agreement to ensure continued aircraft availability during periods when an installed engine is removed for repair, overhaul, or other maintenance. This support ensures operational continuity by providing access to serviceable engines on a temporary basis.

The systematic collection, analysis, and interpretation of engine performance data to detect early signs of deterioration, abnormal behavior, or emerging technical issues. By tracking key engine parameters over time, operators can identify trends that indicate the need for maintenance action before a issue becomes critical.

Oil analysis process that can detect potential engine events by identifying the wear patterns of oil-wetted components.

The complete process of disconnecting, removing, repositioning, and reinstalling an aircraft engine from the airframe to allow for maintenance, repair, inspection, or replacement. R&I covers all labour and tasks associated with detaching or attaching the engine to the airframe. 

Refers to a team of one or more technicians dispatched by P&WC to travel to the location where an engine is situated in order to perform services on the engine.

The transportation, handling, and logistics services required to ship an operator’s own engine (the “core engine”) or a lease engine to and from maintenance, repair, overhaul, or storage locations. This includes the movement of the engine using approved packaging, stands, or containers to ensure safe, compliant transport in compliance with the applicable Incoterms.

The removal and replacement of engine parts that have reached or exceeded their allowable number of cycles, as defined in the applicable P&WC Manuals.

The line maintenance tasks recommended to be performed at scheduled intervals in accordance with the P&WC Manuals, excluding pre-flight, daily tasks and/or power assurance checks, and
washes.

The inspection, assessment, and corrective maintenance performed to restore an engine that has suffered damage over a period of time, by environmental factors such as but not limited to, environmental matter/debris ingested by such Engine (i.e. sand, dirt, airborne particles, etc.) and/or operating, parking or storing Engine(s) in an environment where corrosion and/or sulphidation is more likely to occur.