Single-engine turboprop asset
Pilatus PC-12 aircraft records review
A PC-12 records review checks the file of a single-engine turboprop against the program and engine status its status lists assert. Lessors, operators, and acquisition teams run it before a purchase, a re-lease, or a handover. With one powerplant carrying the value, the work weighs the engine's time-since-overhaul and hot-section history, the inspection program, AD and SB accomplishment, and the role-equipment and avionics modifications. You receive a discrepancy register, an engine-status gap list, and the evidence each open item needs to close.
When this review is needed
- A single-engine turboprop is changing hands and the engine's time-since-overhaul and hot-section status set the value.
- The aircraft carries role-equipment or avionics modifications that each have to be tied to an approval and a weight-and-balance amendment.
- A handover requires the inspection program current against the correct revision and the records assembled to match.
- Engine-program or overhaul coverage is asserted and the supporting evidence has to be confirmed before closing.
The problem
A single powerplant leaves no second engine to absorb a weak record. A status list can state time-since-overhaul that the shop report does not back, and hot-section intervals can be tracked one way in the logbook and another way on the status list. Role-equipment installations are common on this type and each one is a configuration change, but the approval and loading paperwork behind them is often the part that did not keep up.
What gets reviewed
- Inspection-program status and the revision and approval basis in force
- AD and SB accomplishment checked against the work evidence
- Engine time-since-overhaul, hot-section inspection history, and any overhaul or program enrollment
- Role-equipment and avionics modifications and the approvals and weight-and-balance amendments behind them
- Powerplant accumulation reconciled between the logbook, the status list, and the shop reports
- Status lists reconciled against logbooks and work-pack source documents
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
- Engine time-since-overhaul and hot-section status reconcile with the shop and inspection reports
- Each modification cites an STC or approval whose document is on file and matches the installation
- Weight-and-balance records reflect the role-equipment actually fitted to the aircraft
- AD closure is supported by accomplishment evidence that names the method of compliance
- Inspection-program sign-offs correspond to the program revision in force
Evidence normally required
Common discrepancies
- Time-since-overhaul stated on the status list but not backed by the shop report
- A role-equipment or avionics modification installed without the approval paperwork in the file
- Hot-section intervals tracked inconsistently between the logbook and the status list
- Weight-and-balance figures that were never amended for an installed mission configuration
- AD status held in the tracking system without source accomplishment evidence
What is at stake
An overhaul or hot-section claim the records cannot support puts the dominant value of the aircraft in question, with nothing to offset it. A role-equipment installation without its approval may have to be substantiated or removed, and a stale weight-and-balance basis undermines the loading of an aircraft that often flies mission-specific configurations.
How the work runs
Center on the engine
Establish the engine's overhaul and hot-section status and the program or enrollment the value depends on.
Back the engine claims
Reconcile time-since-overhaul and hot-section history against the shop and inspection reports.
Anchor the role equipment
Tie each role-equipment and avionics installation to its approval and confirm the weight-and-balance record moved with it.
Register and assign
Record each finding with its source and a closure path, naming the responsible party.
What the buyer receives
- A discrepancy register listing each finding with its source and evidence trace
- An engine-status gap list covering overhaul and hot-section history
- A role-equipment configuration note tying each installation to its approval and loading record
- A closure path for each open item naming the responsible party
Who uses the output
- Acquisition teams pricing the powerplant status into the deal
- Operators confirming the role-equipment configuration before taking the aircraft on
- Records teams assembling the engine and modification dossier
How the work fits into the transaction or program
The review runs before handover so engine and role-equipment findings can be priced or closed while leverage holds. Its output supports the data room and the configuration baseline the next operator inherits.
Start with a single asset
Start with a single tail and expand once the workflow is proven.
Aircraft-specific considerations
A single-engine turboprop concentrates value in one powerplant, so the review weighs the engine's overhaul interval, hot-section history, and program enrollment heavily with no second engine to offset an unsupported claim, and it treats each role-equipment installation as a configuration change requiring its own approval and weight-and-balance trace.
Regulatory limits
The review confirms that the records are complete, consistent, and traceable. It does not approve a modification, certify an overhaul, determine airworthiness, or guarantee acceptance by any authority or buyer.
What this review does not cover
- Physical inspection or borescope of the engine and hot section
- Engineering substantiation to create a missing role-equipment approval
- Issuance of any STC or airworthiness determination
Specific to this review
- With a single powerplant, the engine's overhaul and hot-section status is the dominant value driver and has no second-engine offset if the records do not support it.
- Role-equipment installations are common on this type, and each one is treated as a configuration change requiring its own approval and weight-and-balance trace.
- Hot-section intervals are checked for consistency between the logbook and the status list, because the two are frequently tracked on different bases.
Sources
U.S. Government (eCFR). The legal basis for issuing and enforcing Airworthiness Directives on U.S.-registered products.
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
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. FAA guidance on making and keeping maintenance records and acceptable recordkeeping practices.
Frequently asked questions
Why does a single-engine type put so much weight on the engine records?
With one powerplant there is no second engine to offset a weak record, so the overhaul, hot-section, and program evidence carries the dominant share of the aircraft's value and is checked against the shop reports rather than the status list alone.
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.