A TRUEngine is an engine which has been maintained to GE or CFM manuals and recommendations. A TRUEngine contains TRUEngine LLP, which are life-limited parts (LLP) that have always operated in GE- or CFM-approved configurations. When rotating LLP and their associated critical influencing parts and all other internal engine parts are confirmed for GE- or CFM-approved configuration, the engine is eligible for TRUEngine status.
In addition, GE and CFM strongly advise customers maximize operational reliability by maintaining all engine components – which include all Line Replacement Units (LRUs) and all external accessories (i.e., all other parts as referenced in the Spare Parts Catalog) – to GE and CFM manuals and recommendations.
The TRUEngine program – available for CF6, GE90, GEnx, CF34 and CFM56 engines - was developed in response to a growing industry need to better understand engine material content as assets are evaluated and redistributed. With the TRUEngine designation, engine owners, potential buyers, lessors, and appraisers know that an engine's content and maintenance history have been verified by GE or CFM, enabling them to more easily evaluate engine configuration, asset value and market attractiveness.
Studies show that engines maintained in the OEM configuration can have as much as 50% higher residual value versus those engines maintained with Parts Manufacturing Authority (PMA) content and/or Designated Engineering Representative repairs (DERs)†. For details on this research, view the GE Service Solutions article [PDF] regarding a study conducted by the International Bureau of Aviation (IBA) that examined asset resale prices for CF6-80C2 and CFM56-3/-5C engines.
The TRUEngine qualification process includes submittal of maintenance records by the customer and a review by GE or CFM to ensure engine configuration and overhaul practices are consistent with GE- and CFM-issued engine manuals and other recommendations. There is no cost to participate, and the TRUEngine designation is fully transferrable. The TRUEngine designation is granted on an individual engine serial number basis and remains in effect until the next shop visit (re-qualification). Participants also enjoy other benefits such as extended spare parts warranty and optimized product support.† Based on CFM, GE and independent third-party research.
A TRUEngine LLP is an LLP (life-limited part) that GE or CFM has verified, through a back-to-birth records review, has been maintained to GE or CFM manuals and recommendations since birth. LLP are qualified at the part level and at a specific time-since-new and cycles-since-new interval.
A proactive answer to customer requests for a reliable means of identifying LLP that have always operated in a GE or CFM configuration, this extension of the well-established TRUEngine program is designed to help operators support the value of their assets and assure optimized GE and CFM technical support.
LLP are the most critical engine parts and include rotating components such as disks, spools and shafts. Life limits are established using a rigorous methodology that is applied to both individual parts as well as the engine system.
Systems-level analysis is critical because some non-life-limited “influencing parts” like turbine blades and seals can significantly impact durability of LLP.
Along with GE and Snecma engine overhaul facilities, ST Aerospace (CFM56), StandardAero (CFM56 and CF34) and EGAT (CF6) are licensed TRUEngine Authorized MROs. This gives customers choice and the assurance that these shops perform overhauls with materials that adhere to OEM engine specifications.
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For more information on all aspects of the TRUEngine program, email firstname.lastname@example.org