CFM56 maintenance program
CFM56 engine maintenance program records review
This review confirms that a CFM56 engine has been maintained to an approved program and that its current task status traces to the revisions actually in force. It is run by or for an operator, lessor, or asset manager evaluating or transferring a specific engine serial number. It checks approved program revisions, task escalations, any bridging analysis between programs, and the source documents behind the intervals. You receive a program status view tied to source, an exception list for unsupported intervals, and a closure plan for the engine under review.
When this review is needed
- An engine is transferring between operators and its task status has to bridge to the receiving program.
- Escalated intervals are claimed and the approval behind each escalation has to be confirmed.
- The program revision in force has changed and the recorded status was never updated to match.
- A buyer needs the engine's maintenance basis reconciled to source before pricing it.
The problem
A CFM56 is maintained to a program that gets revised, escalated, and sometimes bridged between operators, and its recorded task status only holds if it traces to the revision actually approved. An interval escalated without its approval on file, or a status carried forward against a superseded revision, leaves the program picture looking current while the basis behind it has quietly detached from source.
What gets reviewed
- Approved program revisions confirmed against the status the records assert
- Task escalations traced to the approval that authorized each one
- Any bridging analysis between programs checked for completeness
- Recorded intervals reconciled to the revision actually in force
- Source documents behind the program status confirmed as retrievable
- Program tasks affecting LLP and hard-time items reconciled to their status
Scope this review
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What gets validated
- Recorded task status traces to the program revision in force, not a superseded one
- Each escalated interval is supported by the approval that authorized the escalation
- A bridging analysis between programs accounts for every affected task
- Program intervals reconcile to the engine's utilization and status sheet
- The source document behind each program task is identified and retrievable
Evidence normally required
- The maintenance program status for the engine serial number
- Approved program revisions and their effective dates
- Escalation approvals and any bridging analyses on file
- The engine utilization records supporting the intervals
- Source-document references for the program tasks
Common discrepancies
- A task status carried forward against a superseded program revision
- An escalated interval with no approval evidence behind it
- A bridging analysis that omits tasks affected by the program change
- A program task whose source document cannot be located
What is at stake
A task status that does not trace to an approved revision cannot be relied on by the receiving operator and may have to be reset to the base interval, pulling maintenance forward. An escalation claimed without its approval erodes the value built on longer intervals, and an unbridged program leaves gaps that surface at the first check under new oversight.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Fix the revision in force
Establish which approved program revision governs the engine and its effective date.
Trace the intervals
Reconcile recorded task status and escalations to the approvals that authorized them.
Check the bridge
Confirm any bridging analysis between programs accounts for every affected task.
List the exceptions
Flag intervals and escalations without traceable approval and set the evidence needed.
What the buyer receives
- A program status view tied to the approved revisions in force
- An exception list for intervals and escalations without traceable approval
- A closure plan naming the approval or source needed for each open item
Who uses the output
- Continuing-airworthiness teams bridging the engine onto a receiving program
- Asset managers pricing the engine against intervals the records actually support
- Records teams assembling the program evidence a buyer will require
How the work fits into the transaction or program
The program review runs ahead of a transfer or a program bridge so unsupported intervals are found before the receiving operator inherits them. Its exception list feeds the recovery of escalation approvals and the bridging work the induction depends on.
Aircraft-specific considerations
CFM56 engines move between operators running different maintenance programs, so task status often has to be bridged rather than carried across, and escalations approved under one operator may not survive the move. The review is scoped to the specific serial number's program history, since the intervals in force on one engine say nothing about another on the same type.
Jurisdiction-specific considerations
An engine moving between an FAA and an EASA operator has to satisfy the continuing-airworthiness program the receiving system requires, so the review notes where an escalation or program basis approved under one authority would need re-approval under the other.
Regulatory limits
The review confirms that recorded program status traces to approved revisions and escalations. It does not approve a maintenance program, authorize an escalation, or determine that the engine is airworthy.
What this review does not cover
- Authoring or approving a maintenance program or escalation
- Performing or scheduling any maintenance task
- Any airworthiness determination on the engine
Specific to this review
- An escalated interval is only worth the approval behind it, so an escalation claimed without its authorization is reset to the base interval, pulling maintenance forward.
- Program status detaches from source silently when a revision changes and the recorded intervals are not updated to the new basis.
- Bridging between two operators' programs is where CFM56 task gaps hide, because a task escalated under one program may have no counterpart under the receiving one.
Sources
U.S. Government (eCFR). Air carrier maintenance recordkeeping and retention requirements under Part 121.
U.S. Government (eCFR). Maintenance recordkeeping and retention requirements for Part 135 operators.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
International Civil Aviation Organization. International standards for aircraft operation, including maintenance program and recordkeeping expectations.
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.
Frequently asked questions
Why does an escalation need its approval on file if the interval is already in use?
The interval only holds if the escalation was approved and the approval can be shown. Without it, a receiving operator resets the task to its base interval, which pulls the next maintenance event forward and erases the value the longer interval carried.
Relevant glossary terms
Related pages
Where this fits
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