TRUEngine™ Designation

A commercial jet engine is typically in service for more than 25 years and changes ownership at least once in its operational life. The engine's material content, maintenance history and supportability impact marketability and overall value.

In fact, recent 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 Repairs (DERs).

For more information on some of this compelling research, view the GE Service Solutions article [PDF] regarding a recent study conducted by the International Bureau of Aviation (IBA) that examined asset resale prices for CF6-80C2 and CFM56-3/-5C engines.

The TRUEngine program - now available for CF34 engines, as well as CF6, GEnx and CFM56 - was developed in response to a growing industry need to better understand engine material content as assets are evaluated and redistributed.

As the owner of a GE engine, you want to maximize your asset's marketability and have peace of mind that it receives the full range of GE's world-class support.

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, enabling them to more easily evaluate engine configuration, asset value and re-marketability.

† Based on CFM, GE and independent third-party research.

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TRUEngine Authorized MROs

Along with GE and Snecma engine overhaul facilities, ST Aerospace (CFM56) and StandardAero (CFM56 and CF34) 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.

The TRUEngine Value

TRUEngine qualification enhances an engine's marketability and asset valuation by designating those engines as having known OEM material content and configuration and by providing customers with valuable quantitative benefits.

Qualification for TRUEngine status is a two-step process that includes the customer declaration and a submittal of maintenance records to ensure the engine configuration, overhaul practices, spare parts and repairs used to service an engine are consistent with GE and CFM issued engine manuals and other maintenance recommendations.

CF6 Benefits

Extended Parts Warranty

With the TRUEngine program for CF6 engine lines, the new part warranty is extended to 6,000 EFH of full (100%) coverage. This applies to new parts installed at a shop visit occurring after the engine receives the initial TRUEngine qualification. In addition, the qualification is transferable in case of ownership change or lease.

Complimentary Access to Lease Pool Engines Guarantee

Complimentary days access to the CF6 Engine Lease Pool is granted in the event a TRUEngine qualified engine is unavailable due to an engine-caused unscheduled engine removal (UER) creating an imminent AOG situation. GE will provide a credit to the customer equal to the value of the daily lease fees for the allotted number of days. The more engines a customer qualifies increases the number of eligible events and free lease days per year.

The customer must be properly spared and meet other requirements for access to the CF6 Lease Pool. Daily lease fees are waived; however, restoration and transportation fees still apply.

GEnx Benefits

Content Assurance Guarantee

If non-GE-approved content is found in an engine after the TRUEngine qualification process, GE will provide a credit for equivalent replacement material to restore the engine to qualified status. In addition, as part of the qualification process, GE will not invoice for incoming part clean and serviceability fees performed in-house by GE on parts removed from a TRUEngine qualified engine serial number (ESN).

AOG First Response Guarantee

If TRUEngine qualified, all engine caused aircraft-on-ground (AOG) inquiries to GE's Aviation Operations Center (AOC) will receive a first response within four hours. If a first response is not delivered to the Customer within four hours of the creation of an AOG inquiry, GE will provide the customer a spare parts credit.

Line Maintenance Special Guarantee

If Service Bulletins are incorporated according to the recommended intervals, GE will provide a line maintenance guarantee that caps the fleet average labor hours at 16 hours per 1,000 engine flight hours (EFH) on qualifying maintenance tracked by the customer. The average labor hours will be reconciled every five years, and a spare parts credit will be provided to compensate for the excess line maintenance labor costs.

Life-limited Parts (LLP) Scrap for Cause Guarantee for GEnx LLP Services Agreement Customers

Uniquely for those who participate in a GEnx LLP Services Agreement, if an LLP part is not repairable and subsequently scrapped due to normal wear, GE will grant a pro rata parts credit toward the purchase of the replacement LLP part. This credit will be based on the amount of cycles remaining on the part and can be as high as 50% of the then current Catalog List Price.

CF34 Benefits

Extended New Part Warranty

With the TRUEngine program for CF34 engine lines, the new part warranty is extended to 4,000* EFH of full (100%) coverage. This applies to new parts installed at a shop visit occurring after the engine receives the initial TRUEngine qualification. In addition, the qualification is transferable in case of ownership change or lease.

*Does not apply to engines operated in hot and harsh environments.

Complimentary Access to Lease Pool Engines Guarantee

Complimentary days access to the CF34 Engine Lease Pool is granted in the event a TRUEngine qualified engine is unavailable due to an engine-caused unscheduled engine removal (UER) creating an imminent AOG situation. GE will provide a credit to the customer equal to the value of the daily lease fees for the allotted number of days. The more engines a customer qualifies increases the number of eligible events and free lease days per year.

The customer must be properly spared and meet other requirements for access to the CF34 Lease Pool. Daily lease fees are waived; however, restoration and transportation fees still apply.

AOG First Response Guarantee

If TRUEngine qualified, all engine caused aircraft-on-ground (AOG) inquiries to GE's Aviation Operations Center (AOC) will receive a first response within four hours. If a first response is not delivered to the Customer within four hours of the creation of an AOG inquiry, GE will provide the customer a spare parts credit.

Content Assurance Guarantee

This benefit includes up to a 50% parts credit for replacement of a non-OEM part or repaired part discovered at the first shop visit after transfer of ownership of a TRUEngine qualified CF34 engine to a 3rd party.

  • Coverage is for all TRUEngine qualified engines
  • Covered parts include flowpath
  • Expires after transferee’s first shop visit
  • Does not apply to transfers between lessees


For information on the CFM56 TRUEngine program, click here and select the TRUEngine™ category.