LLP traceability
Bombardier CRJ family life-limited part traceability review
This review follows the life-limited parts on a Bombardier CRJ back through their recorded history and tests whether each one's cycle count, part history, and release evidence actually reach a defensible origin. It is run by or for the party buying, transferring, or remarketing the regional jet, before the LLP position is priced or accepted. It covers the LLP status sheet, the part history behind each item, the shop reports and release certificates that document it, and the cycle-accumulation records that set remaining life. You receive an exception list keyed to the LLP status sheet, a source map behind each part's trace, and a closure plan for the parts whose history breaks.
When this review is needed
- A CRJ is being sold and the buyer requires back-to-birth trace on the life-limited parts before it pays.
- An engine is coming off for separate sale and its LLP trace drives the price.
- The tail has changed operators and the LLP cycle counts have to reconcile across the handover.
- A remarketing team needs the LLP status sheet supported before it lists the asset.
The problem
A life-limited part is worth its documented remaining life, and on a CRJ that has served with several operators the trace tends to break at a change of hands or a shop visit that recorded the part but not its full origin. The LLP status sheet shows a cycle count that looks precise, but the count is only as good as the records feeding it, and a single missing release certificate or an unreconciled cycle reset at a shop visit can undermine an entire part's history. Whoever accepts the tail inherits every count on the sheet, and the documents that would prove them are scattered across shop packages and prior operators.
What gets reviewed
- Each life-limited part on the status sheet traced through its recorded history to origin
- Cycle counts reconciled across the airframe, engine, and shop-visit records
- Release certificates confirmed present for each part at each change of custody
- Shop reports checked for cycle resets or module builds that affect the count
- Remaining life recomputed from the traced history rather than the status-sheet figure
- Parts whose trace breaks flagged with the point where the history fails
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 part's history reaches a defensible origin without an unexplained gap at a change of custody
- The cycle count on the status sheet reconciles to the shop and airframe records feeding it
- A release certificate is present for each part at each shop visit or transfer in its history
- A module build or cycle reset in a shop report is reflected consistently in the count
- Remaining life recomputed from source matches the figure the status sheet asserts
Evidence normally required
- The LLP status sheet for the airframe and engines
- Part history and shop reports for each life-limited part
- Release certificates documenting each part at each change of custody
- Cycle-accumulation records across the tail's operators
- Any prior findings on the LLP trace for the tail
Common discrepancies
- A part whose trace breaks at a shop visit that recorded it but not its prior origin
- A cycle count on the sheet that does not reconcile to the shop report behind it
- A missing release certificate at a change of operator in the part's history
- A module build in a shop report that the status-sheet count does not reflect
What is at stake
A life-limited part whose trace does not reach a defensible origin loses most of its documented value and can be treated as though it has no established remaining life at all. On a CRJ engine sold separately, a broken LLP trace can drop the sale price sharply or stall it entirely, and reconstructing back-to-birth history after the fact is expensive and sometimes impossible once the shops that held the records have moved on.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Read the status sheet
List the life-limited parts on the airframe and engines with the cycle counts the sheet asserts.
Follow the history
Trace each part through its shop reports and releases to a defensible origin, marking where it breaks.
Reconcile the counts
Recompute remaining life from the source records and reconcile it to the status-sheet figure.
Plan the recovery
List the parts needing release retrieval or reconstruction and where the documents should sit.
What the buyer receives
- An exception list keyed to the LLP status sheet, flagging the parts whose trace breaks
- A source map linking each part's cycle count to the records that establish it
- A closure plan for the parts needing release retrieval or reconstruction
Who uses the output
- Asset and remarketing teams pricing the LLP position the trace actually supports
- Records teams retrieving the release documents each broken trace requires
- Buyers requiring back-to-birth evidence before they accept the life-limited parts
How the work fits into the transaction or program
The review runs before the LLP position is priced or accepted, so broken traces are found while the shops and operators that hold the missing releases can still be reached. Its closure plan drives the release retrieval and reconstruction that has to finish before an engine is sold separately or the tail changes hands on its documented remaining life.
Aircraft-specific considerations
A CRJ's high-cycle regional utilization means life-limited parts accumulate cycles quickly and their engine records turn over often, so a shop visit that reset or rebuilt a module is a frequent point where the count and the trace part company. Because the family has typically served under several operators, a part's release history spans multiple custody changes, and the trace is followed through each one rather than trusted from the current status sheet.
Jurisdiction-specific considerations
An FAA-based CRJ moving toward an EASA register brings its LLP trace under a system that reads release evidence on its own terms, so a certificate accepted domestically may need a dual-release or an equivalent record for the receiving authority. The review notes which parts will need additional evidence before the receiving system accepts their remaining life.
Regulatory limits
The review assembles and reconciles LLP trace so a buyer or authority can rely on the documented remaining life. It does not certify a part, set its life on an authority's behalf, or make an airworthiness determination.
What this review does not cover
- Re-lifing or re-certifying any life-limited part
- Physical inspection or condition assessment of the parts
- Any airworthiness determination on the aircraft or its engines
Specific to this review
- A CRJ life-limited part's value collapses to near its scrap basis when the trace cannot reach a defensible origin, regardless of the cycles the sheet shows remaining.
- The most common CRJ LLP trace break is a shop visit that recorded the part but not its prior origin, which severs the back-to-birth chain at that point.
- A module build or cycle reset in a shop report has to be reflected in the count, so the status-sheet figure is recomputed from the shop records rather than accepted.
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 LLP status sheet gives exact cycles remaining. Why trace each part?
The cycle figure is only as sound as the records feeding it. On a CRJ that changed operators, a part's trace often breaks at a shop visit or a handover, and a break there can undo the whole back-to-birth chain no matter how precise the sheet looks. Tracing each part to origin is what makes the remaining life defensible to a buyer.
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.
Talk through the aircraft, records, evidence, deadline, and next useful step.