LLP traceability
ATR 72 life-limited part traceability records review
This review traces the life-limited parts on an ATR 72 back to birth and confirms the remaining life on the status sheet is supported by real documents. It is run for a lessor, operator, or manager who needs LLP standing to hold before a sale, a lease return, or an engine transaction. The work follows part history, shop reports, release certificates, and cycle-accumulation records to check that each part's used life is continuous and evidenced. You receive an exception list of LLPs with broken or unsupported traces, a source map for each part, and a closure plan for the gaps that put remaining life at risk.
When this review is needed
- An ATR 72 or its engines are being sold and the buyer will demand LLP trace to birth before paying.
- A lease return requires the LLP status verified against release documents, not the tracking summary.
- An engine has been through multiple shop visits and the cycle accumulation across them needs reconciling.
- A part was installed from stock and its prior-life record has never been checked against its release paperwork.
The problem
An LLP status sheet is a summary, and remaining life on it means nothing without the documents that prove used cycles at every step from birth to the current install. A single shop visit that changed a module can break the trace, a part installed from a pool can arrive with a prior-life figure no one confirmed, and cycle accumulation recorded against the airframe may not reconcile with the part's own history. The trace is only as strong as its weakest handoff, and on an ATR 72 those handoffs stack up over a long service life.
What gets reviewed
- Part history from birth record through each install and removal to the current position
- Shop reports and module build records for parts that passed through overhaul
- Release certificates supporting each change of custody in the part's life
- Cycle accumulation reconciled between the part's history and the airframe or engine
- Remaining life on the status sheet confirmed against the traced used life
- Parts installed from stock checked against their incoming prior-life records
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 LLP traces to a birth record with no unexplained break in custody
- Used cycles at every shop visit reconcile with the cycle-accumulation history
- Remaining life on the status sheet matches the life computed from the traced used cycles
- A part installed from stock carries a release certificate and a confirmed prior-life figure
- Module build records account for every LLP in the current build with its own trace
Evidence normally required
- The LLP status sheet for the airframe and engines
- Birth records and back-to-birth trace documents for the parts
- Shop reports and module build records from each overhaul
- Release certificates for parts changing custody
- Cycle-accumulation records for the airframe and engines
Common discrepancies
- An LLP whose trace breaks at a shop visit where the module was rebuilt
- A part installed from stock with a prior-life figure that has no supporting document
- Remaining life on the status sheet that does not match the traced used cycles
- A module build record that omits an LLP present in the current configuration
What is at stake
A broken trace forces the remaining life to be treated conservatively, which cuts the part's value or, on an engine, the value of the whole asset. A buyer who cannot verify trace to birth may refuse the part outright or hold back value until it is proven. Reconstructing a missing shop report or birth record years later is difficult, so an unresolved trace tends to become a permanent discount.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Anchor to birth
Establish the birth record and starting life for each LLP in the configuration.
Follow the custody chain
Trace each part through its installs, removals, and shop visits with release evidence.
Reconcile the cycles
Confirm used cycles at each step agree with the accumulation history and the status sheet.
Plan the recovery
List broken traces and sequence the document recovery that closes them.
What the buyer receives
- An exception list of LLPs with broken, incomplete, or unsupported traces
- A source map documenting the trace assembled for each part back to birth
- A closure plan for the parts whose remaining life cannot yet be relied on
Who uses the output
- Asset managers pricing the airframe or engines against verified LLP life
- Trading teams assembling trace packages for parts headed to resale
- Records teams recovering the documents behind broken traces before a deal
How the work fits into the transaction or program
LLP trace is the highest-value evidence in most ATR 72 transactions, and engine value in particular turns on it. This review confirms the trace before a sale, a return, or a part-out prices against it, and its closure plan drives the document recovery that has to finish before remaining life can be relied on.
Aircraft-specific considerations
The ATR 72's turboprop powerplant carries life-limited rotating parts whose trace runs through propeller and engine shop visits that a jet review would not encounter the same way. Long regional service lives mean many custody changes per part, and pool or stock installations are common, so incoming prior-life confirmation is a recurring weak point in the trace.
Jurisdiction-specific considerations
Where an ATR 72 moves between the FAA and EASA systems, LLP release documents raised on one authority's form have to satisfy the other, so the review flags parts whose trace is complete but presented on paperwork the receiving side would want re-issued.
Regulatory limits
This work verifies that LLP traceability is continuous and that remaining life is supported by source documents. It does not set or restore a part's life on an authority's behalf, certify a part, or make an airworthiness determination.
What this review does not cover
- Re-lifing or re-certifying any life-limited part
- Physical inspection or teardown of the parts or engines
- Any airworthiness determination on the traced parts
Specific to this review
- LLP remaining life is only as good as its weakest custody handoff, and a single rebuilt module can break the whole trace.
- On ATR 72 engines the trace runs through propeller and powerplant shop visits, adding handoffs a jet review does not see.
- Parts installed from a pool commonly arrive with an unconfirmed prior-life figure, which is where the trace most often fails.
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.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
The status sheet shows remaining life on every part. Isn't that enough?
The status sheet states a figure; it does not prove it. A buyer verifies remaining life by tracing used cycles to birth through the release documents, so this review checks the trace behind the figure before that scrutiny arrives.
Relevant glossary terms
Related pages
Where this fits
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We will walk through your current state, the records or evidence involved, and a scoped first engagement.
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