O&M takeover, warranty period and MCR campaigns
The evidence does not stop at takeover — the warranty period is where it gets used.
After takeover, the same register carries end-of-warranty inspections, defect claims and major component replacement campaigns. Deskely keeps the construction evidence and the operating evidence in one place, which is what makes a warranty claim provable.
- Milestones
- PAC then FAC
- Window
- Typically 2 to 5 years
- Use
- Defect claims and MCR
- Basis
- Construction evidence
Choose your project type
The problem
The claim depends on records written three years earlier.
When a component fails inside the warranty period, the argument is about what was installed, how it was torqued, whether it was preserved and what was accepted at takeover.
If that evidence sits in a scanned archive owned by a contractor who has demobilised, the claim is settled on commercial pressure rather than on fact.
Deskely keeps the construction record live and searchable at the asset, so the operations team argues from the record instead of around it.
Provisional and final acceptance
PAC and FAC are certificates with conditions attached.
Provisional acceptance usually carries a punch list and a set of outstanding obligations. Final acceptance closes them.
Deskely holds both as certificates issued per asset from the underlying records, with the carried items owned, dated and visible to both parties throughout the period.
Nothing quietly disappears between PAC and FAC, because the list is the same list the whole time.
End-of-warranty inspections
The inspection campaign is the last chance to move cost back across the line.
End-of-warranty inspections run across the fleet on a fixed template, offline, with photos — the same execution model as construction.
Findings are raised as punch against the asset and linked to the original installation record where relevant, which is what turns a finding into a claim.
Fleet-level reporting shows how many assets have been inspected, what was found and what remains contested.
Major component replacement
A blade or gearbox exchange is a small commissioning project.
MCR campaigns need the same discipline as installation: component traceability, lift and torque records, functional testing and a return-to-service decision backed by evidence.
Deskely runs them as scoped campaigns against the existing asset register, so the replacement record joins the asset's history rather than starting a new file.
Years later, the asset shows what was original, what was replaced, when and on whose signature.
Availability and serial defect campaigns
The warranty is settled on numbers, so availability and defect evidence has to be defensible month by month.
A service agreement warrants an availability figure, and the difference between the warranted and the achieved number is a payment. Getting there means agreeing downtime categorisation turbine by turbine, event by event: OEM fault, grid curtailment, weather standby, owner-caused outage or force majeure.
Alongside that sits the serial defect question — once a fault appears on enough positions it becomes a campaign with a different commercial owner, and the threshold argument is won or lost on how consistently the individual events were recorded.
With defect records, categorisation and evidence held against each position from the day it was taken over, the monthly availability report and the serial defect case are built from the same signed history both parties already accepted.
The warranty baseline
Performance is judged against a baseline, and the baseline is only defensible if it was recorded, not remembered.
Availability and power curve disputes in year two are argued from records taken at warranty start, not from the punch list. Deskely keeps every warranty-relevant record against the asset from the day it was signed, so the baseline the operator inherits is the one the OEM actually tested.
Power curve and performance test record
The turbine's measured output against wind speed matches the contracted power curve within the agreed tolerance.
During the warranty start test campaign, after commissioning is complete.
SCADA point-to-point verification
Every operational and alarm signal used for availability calculation reaches the operator's system correctly, forming the baseline for future disputes.
Immediately before warranty start is declared.
Yaw and pitch system calibration record
Yaw and pitch actuation are calibrated to the control system's reference positions at warranty start.
During the warranty start test sequence.
Vibration and condition monitoring baseline
Drivetrain and tower vibration signatures are captured as the reference condition against which future degradation is measured.
At warranty start, before the asset enters normal operation.
Preservation and lay-up completion record
All preservation routines run since mechanical completion were closed out before the warranty clock started, ruling out lay-up damage as a cause of later failure.
At the transition from installation to operational status.
Warranty start certificate with punch carried at takeover
The performance, calibration and monitoring baseline is signed and any residual punch is listed with an owner and a close-out date.
At the formal start of the warranty period.
How it runs
From takeover to final acceptance and beyond.
The operating organisation inherits an asset base and a set of obligations. Both are easier when the construction evidence never left the system.
- 01
Issue takeover per asset
PAC certificates from signed records, with outstanding items carried, categorised and owned.
- 02
Carry the punch list live
Outstanding obligations tracked in the same register as construction, visible to both parties.
- 03
Run inspection campaigns
Templated end-of-warranty inspections across the fleet, executed offline with photos.
- 04
Link findings to records
Each finding tied to the installation or commissioning record it disputes, forming the basis of a claim.
- 05
Execute MCR as a campaign
Component traceability, lift, torque and functional testing recorded against the existing asset.
- 06
Close out at final acceptance
FAC issued when carried items are closed, with the full history exportable for the asset owner.
FAQ
Questions about Operations and warranty scopes.
Keep reading
Offshore wind commissioning
The full sector view: fleet-wide record sets, offline execution at sea, energisation gates and takeover.
Read morePunch lists
Defects raised at the asset with photos, categorised by whether they block energisation or takeover.
Read moreCertificates
Mechanical completion, energisation and takeover certificates issued from signed records, per asset.
Read moreOther wind project types: Fixed-bottom wind farms, Floating offshore wind, Offshore substations and platforms, Array and export cables, HVDC converter stations, Onshore substations and grid connection, Turbine installation and pre-assembly campaigns, Onshore wind farms.
