Engine records by type
Pratt & Whitney GTF engine records review
A geared-turbofan records review verifies that an engine's module status, life-limited part history, and shop-visit evidence agree with the status list a buyer, lessor, or technical-acceptance team is relying on. It is run before a sale, a lease return, or an on-wing engine swap. It reviews the fan-drive-gear-system embodiment, the electronic engine control software standard, the durability-driven service bulletins worked, and the build standard returned at each visit. You receive a per-module trace, a list of breaks against the status list, and the evidence needed to close each one.
When this review is needed
- A geared-turbofan engine is changing hands and the module and LLP position drive most of its value.
- An engine has come off wing early and the shop findings need reconciling against the pre-removal status.
- A lease return references a build standard and the embodied durability bulletins have to be confirmed.
- An on-wing exchange is planned and the receiving operator needs the configuration and software standard verified first.
The problem
On a geared turbofan the value concentrates in the modules and the fan-drive gear system, yet the position is usually read from a one-line summary. Durability campaigns on this engine family have moved quickly, so the worked service-bulletin standard and the visit history carry as much weight as the bare life remaining. When the status list has not been tied back to the shop reports, the modules can read as more current than the engine actually is on wing.
What gets reviewed
- Engine and module configuration by part number and serial number
- Fan-drive-gear-system standard and any embodiment driven by service bulletin
- Life-limited disk and spool history with time and cycle accumulation
- Shop-visit workscopes, findings, and the build standard returned to service
- Electronic engine control software part number against the approved standard
- Authorized release certificates for the engine and replaced modules
Scope this review
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What gets validated
- Each module traces to a release certificate and a consistent time and cycle record
- Life-limited disk life remaining is supported by the shop report rather than the summary alone
- Embodied durability service bulletins match the build standard the lease or sale references
- Shop-visit findings reconcile with the recorded part and serial numbers returned to service
- The engine control software loaded matches an approved part number for the configuration
- Total time and cycles agree across engine logbook, shop reports, and the status summary
Evidence normally required
- Engine and module status list with part and serial numbers
- Shop-visit reports and workscope documents for each visit
- LLP status with supporting release certificates
- Service Bulletin and modification status for the engine serial number
- Configuration record for the electronic engine control software
Common discrepancies
- A module returned to a build standard that the status summary does not reflect
- Disk life remaining stated on the summary that the shop report does not support
- A durability service bulletin shown as embodied without the accomplishment evidence
- Electronic engine control software part number that lags the approved standard
- A release certificate missing for a module installed at an earlier visit
What is at stake
An engine accepted on an unsupported module standard can need an unplanned shop visit to reach the build the deal assumed, and that cost lands after the seller has been released. A geared-turbofan core that is misread on durability embodiment also carries removal-interval risk the buyer did not price.
How the work runs
Scope the engine
Define the module set, the build standard the deal references, and the software and bulletin status in scope for this serial number.
Reconcile to shop reports
Compare module, disk, and software status against the shop-visit and release evidence for each visit.
Register breaks
Structure each finding with its source document, the module it touches, and its effect on the build standard or life remaining.
Map closure
Recommend a closure path and responsible party so the engine can be accepted or driven to resolution.
What the buyer receives
- A per-module traceability record with each break in the chain identified
- A reconciled view tying the status list back to the shop-visit evidence
- A software and embodiment status note against the approved standards
- A recommended closure path for each finding with the responsible party named
Who uses the output
- Asset and acquisition teams pricing the engine
- Records teams assembling the trace package for the deal
- Engineering deciding how to treat a module on an unsupported standard
How the work fits into the transaction or program
The review supports a sale, a lease return, or an engine swap by turning a status summary into a supported module trace. It feeds the engine data room and the discrepancy register for the wider asset transaction.
Start with a single asset
Start with a single tail and expand once the workflow is proven.
Aircraft-specific considerations
This engine family is built and traded by module, and the fan-drive gear system sits at the center of its durability story. The review is scoped to module-level evidence and software configuration rather than airframe-level totals, because that is where remaining value and removal risk actually sit.
Jurisdiction-specific considerations
A module released on one authority's form is not automatically accepted under another. Where modules have moved across authorities at shop visits, the trace has to show release documentation the receiving authority will accept.
Regulatory limits
The review confirms completeness, consistency, and traceability of the engine records. It does not certify the engine, determine remaining life on the authority's behalf, or make any airworthiness determination.
What this review does not cover
- Physical inspection, borescope, or test-cell running of the engine
- Re-life or re-certification of any module or part
- Issuance of any regulatory approval or airworthiness determination
Specific to this review
- Value on this engine family concentrates in the modules and the fan-drive gear system, so module-level trace is decisive rather than airframe-level totals.
- Durability campaigns have moved quickly on the geared turbofan, so the worked service-bulletin standard is checked as carefully as the life remaining.
- Electronic engine control software part number is reconciled to an approved standard, because a lagging load can sit unnoticed behind a clean status summary.
- An early off-wing event leaves shop findings that frequently disagree with the pre-removal status summary.
Sources
U.S. Government (eCFR). Records an owner or operator must keep, including total time in service, current status of life-limited parts, and AD compliance.
Federal Aviation Administration. Completion and use of FAA Form 8130-3, Authorized Release Certificate, for new and used parts.
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
Why check the engine control software in a records review?
The loaded software part number is part of the engine configuration. A status summary can show the engine as current while the software standard lags, so the loaded part number is reconciled to an approved standard for the configuration.
Do you need the engine on a test cell?
No. The review works from the module status, shop reports, and release evidence. It is complementary to a physical or test-cell assessment and is often run before one.
Relevant glossary terms
Related pages
Where this fits
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