Turboprop engine records
Pratt & Whitney PW100 turboprop records review
A PW100-class records review confirms that a regional turboprop's three-module configuration, life-limited part history, and inspection evidence agree with the status list a deal relies on. It is run before a sale, a lease return, or a module exchange. It reviews the power-section, reduction-gearbox, and gas-generator histories separately, the hot-section inspection record, the time-since-overhaul position per module, and the release paperwork at each change of custody. You receive a module-level trace, a list of breaks against the status list, and the evidence needed to close each one.
When this review is needed
- A turboprop engine is changing hands and the three modules carry separate histories that drive value.
- A power-section or gas-generator module has been exchanged and the records need to reflect the build standard.
- A hot-section inspection is due or just completed and the status list has to match the disposition.
- A lease return references module build standards that have to be confirmed against the shop reports.
The problem
A turboprop of this class is maintained as three modules with different overhaul and inspection drivers, so the engine status is really three histories that have to agree. Hot-section inspection intervals and the reduction-gearbox condition shape what the engine is worth, and those details rarely surface on a single status line. When power-section and gas-generator records have been tracked apart from the shop reports, the modules can read as more current than they are.
What gets reviewed
- Power-section, reduction-gearbox, and gas-generator module configuration
- Life-limited part history with time and cycle accumulation per module
- Hot-section inspection history, findings, and dispositions
- Module exchange records and the build standard returned to service
- Time-since-overhaul and time-since-HSI consistency across the modules
- Release certificates at each change of custody
Scope this review
Tell us the asset, the event, and the evidence in scope, and we will outline a focused first engagement.
Send a representative, redacted record set and we will scope the review.
What gets validated
- Each module traces to a release certificate and a consistent accumulation record
- The hot-section inspection history reconciles with findings and replaced parts
- Life-limited part life remaining is supported by the underlying shop documents
- Each module exchange shows the build standard installed and the standard removed
- Reduction-gearbox condition is supported by its overhaul or inspection report
- Time-since-overhaul and time-since-HSI are consistent across logbooks and the status list
Evidence normally required
- Engine and module status list with part and serial numbers
- Inspection reports for the hot section and shop visits
- LLP status with supporting release certificates
- Records for any module exchange during the period in scope
- Overhaul or inspection report for the reduction gearbox
Common discrepancies
- A module exchange the status summary records without the removed-and-installed build standard
- Hot-section history that does not reconcile across the three modules
- Life-limited part life remaining unsupported by the shop documents
- A reduction-gearbox condition claimed without its supporting report
- Release paperwork absent for a module installed during the lease
What is at stake
An engine accepted with one module overstated forces an unplanned module exchange or overhaul, and the cost transfers to the buyer after the seller is released. A reduction-gearbox condition taken on trust can stall a placement when the supporting report cannot be produced.
How the work runs
Split the engine into modules
Define the power-section, reduction-gearbox, and gas-generator scope and the inspection drivers for each on this serial number.
Reconcile each history
Tie module status, LLP life, and hot-section dispositions to the shop and inspection reports module by module.
Register breaks
Structure each finding with its source report, the module it touches, and its effect on overhaul timing or value.
Map closure
Recommend a closure path and responsible party so the engine can be accepted or driven to resolution.
What the buyer receives
- A module-level traceability record covering all three modules and any break
- A reconciled status view tying the summary back to inspection and shop evidence
- A time-since-overhaul and time-since-HSI consistency note across the modules
- A closure path for each finding with the responsible party identified
Who uses the output
- Continuing-airworthiness teams confirming module status before acceptance
- Asset and acquisition teams pricing the engine
- Records teams assembling the module trace for the deal
How the work fits into the transaction or program
The review supports a sale, a lease return, or a module exchange by turning a single status line into three reconciled module histories. It feeds the engine data room and the discrepancy register for the transaction.
Start with a single asset
Start with a single tail and expand once the workflow is proven.
Aircraft-specific considerations
This turboprop is maintained as a power section, a reduction gearbox, and a gas generator, each with its own overhaul and inspection drivers. The review treats the engine as three reconciling histories, because rolling them into one status line is exactly where module condition gets misread.
Jurisdiction-specific considerations
A module released under one authority is not automatically accepted under another. Where a module has crossed authorities at an exchange, the trace has to carry release documentation the receiving authority will accept.
Regulatory limits
The review confirms records completeness, consistency, and traceability across the modules. It does not certify the engine, determine remaining life for the authority, or make any airworthiness determination.
What this review does not cover
- Physical inspection, borescope, or test running of the engine
- Re-life or re-certification of any module or part
- Any airworthiness or remaining-life determination
Specific to this review
- A turboprop of this class is maintained as three modules with different overhaul and inspection drivers, so the engine status is three histories that must reconcile.
- Reduction-gearbox condition and hot-section inspection intervals shape value in ways a single status line does not capture.
- Module exchanges only hold value when the installed and the removed build standards are both documented.
- Time-since-overhaul and time-since-HSI are checked per module, because the three drivers rarely move together.
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.
Federal Aviation Administration. FAA guidance on making and keeping maintenance records and acceptable recordkeeping practices.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
Why review three modules separately instead of the whole engine?
The power section, reduction gearbox, and gas generator have different overhaul and inspection drivers, so their statuses move independently. Reviewing them separately keeps a current module from masking an overdue one.
Relevant glossary terms
Related pages
Where this fits
Talk to an engineer who has done this work
We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Walk through your situation with an engineer who has done this work.