LEAP weight and balance
Weight-and-balance records review for LEAP engine assets
This review confirms that the weight-and-balance statement current on a LEAP-powered aircraft is built from a complete, traceable chain of weighings and amendments. It is run for a lessor, airline, or manager evaluating, transferring, or maintaining the asset, usually where equipment or configuration changes have accumulated since the last weighing. It works through the weighing reports, equipment-change entries, configuration amendments, and loading documents, checking that each amendment ties to a recorded change. You receive a supported exception list, a source map, and a closure plan for this asset.
When this review is needed
- Equipment or interior changes have accumulated on a LEAP-powered aircraft and the current statement needs reconciling to them.
- A buyer wants the weight-and-balance chain shown as complete before pricing the asset.
- A modification changed the empty weight and the amendment behind it needs checking against the change.
- The last weighing is dated and the amendments since then have to account for every recorded change.
The problem
The current weight-and-balance statement is only as good as the chain of amendments behind it. On a LEAP-powered aircraft, each equipment change, interior reconfiguration, or modification that shifts empty weight has to produce an amendment that ties back to the recorded change. When an amendment adjusts weight without naming the change that caused it, or a modification altered the empty weight but no amendment followed, the statement stops matching the configuration it is meant to describe.
What gets reviewed
- The current weight-and-balance statement traced back to the last full weighing
- Equipment-change entries reconciled to the amendments they should have produced
- Configuration amendments tied to the modifications that caused the weight change
- Loading documents consistent with the current empty weight and center of gravity
- The amendment chain checked for continuity since the last weighing
- Modifications that shift empty weight confirmed to carry a matching amendment
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
- The current statement follows from the last weighing plus every recorded amendment
- Each equipment change that affects weight produced a corresponding amendment
- Amendments name the modification or change that caused the weight adjustment
- Loading documents are consistent with the current empty weight and center of gravity
- No modification that altered empty weight is missing its amendment
Evidence normally required
- The current weight-and-balance statement for the aircraft
- Weighing reports since the aircraft entered service
- Equipment-change and configuration-amendment records
- Modification records that affect empty weight
- Loading documents in use for the aircraft
Common discrepancies
- An amendment that adjusts weight without naming the change that caused it
- A modification that altered empty weight with no matching amendment on file
- A gap in the amendment chain since the last full weighing
- Loading documents inconsistent with the current recorded empty weight
What is at stake
A weight-and-balance statement that does not reconcile to the configuration undermines the loading data operations relies on and reads as a records defect at a transaction. A modification that changed empty weight without a matching amendment leaves the statement understating or overstating the real figure, and reconstructing the chain after several undocumented changes is slow and sometimes inconclusive.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Anchor to the weighing
Start from the last full weighing and identify the amendments that follow it.
Reconcile changes to amendments
Tie each equipment and configuration change to the amendment it should have produced.
Check the current statement
Confirm the current figures follow from the weighing plus the amendment chain.
List the exceptions
Flag changes without amendments and gaps in the chain, with the evidence to close them.
What the buyer receives
- A supported exception list of amendments and changes that do not reconcile
- A source map linking the current statement to its weighings and amendments
- A closure plan for recovering the amendments or weighing behind each gap
Who uses the output
- Asset managers reading weight-and-balance completeness into the asset's value
- Records teams recovering the amendments behind undocumented weight changes
- Continuing-airworthiness teams relying on the current statement's traceability
How the work fits into the transaction or program
The weight-and-balance review connects to the modification and equipment-list records on the same aircraft, because a change that shifts weight should show up in all three. It runs before the configuration record feeds a transaction, so the current statement a counterparty reads reconciles to the changes the aircraft has actually seen.
Aircraft-specific considerations
On a LEAP-powered aircraft the weight-and-balance chain is usually short but change-dense, because equipment and interior reconfigurations happen faster than full re-weighings, so the review focuses on amendment continuity rather than a long weighing history. The engine change itself rarely drives the statement, so the review keeps attention on airframe equipment and interior changes that move empty weight.
Regulatory limits
The review confirms the weight-and-balance record is complete and traces to recorded changes. It does not weigh the aircraft, issue or amend a weight-and-balance statement, approve a loading system, or make an airworthiness determination.
What this review does not cover
- Weighing the aircraft or performing a re-weigh
- Issuing or amending the weight-and-balance statement
- Any airworthiness determination on the aircraft
Specific to this review
- On a LEAP-powered aircraft the weight-and-balance record usually breaks not at the weighing but at an equipment change that never generated its amendment.
- An interior reconfiguration is the change most likely to move empty weight without a matching amendment, because it can be treated as routine rather than a weight event.
- Because full re-weighings are infrequent, the amendment chain carries almost the entire burden of keeping the statement current, so a single missing amendment propagates forward.
Sources
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.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
Why trace the amendments if we have a current weight-and-balance statement?
A statement is only trustworthy if the chain behind it accounts for every change since the last weighing. If a modification shifted empty weight and no amendment followed, the statement is out of step with the configuration, and that gap reads as a records defect at a transaction even though a current statement exists.
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.