Fractional ownership lives in its own regulatory lane — 14 CFR Part 91 Subpart K. Our companion guide to Part 91 Subpart K fractional ownership compliance and records walks the program structure: the six-element qualifying test, the FAA-issued management specifications, the owner-versus-manager operational-control split, and the §91.1027 operations recordkeeping rule. This guide goes one level deeper into the part of Subpart K that keeps the fleet flying — the maintenance program, and specifically the optional continuous airworthiness maintenance program (CAMP) that runs from §91.1411 through §91.1443.
The reason the maintenance side deserves its own treatment is that it is where a fractional program produces its highest-stakes records. An owner's operational-control acknowledgment matters in litigation; an airworthiness release matters every single time an aircraft leaves the hangar. A CAMP is a heavyweight framework — it imports a maintenance manual, a required-inspection-item discipline, a Director of Maintenance and a Chief Inspector, a continuing analysis and surveillance function, mechanical-reporting duties, and a detailed records-and-retention regime. Each of those is, at bottom, a documentation obligation, and each is checked against the program manager's manual in an FAA review.
Below, every regulatory claim is cited to the specific Subpart K section so you can verify it against the CFR. One housekeeping note up front, because it is a common citation error: the CAMP block of Subpart K runs §91.1411, §91.1413, §91.1415, §91.1417, §91.1423, §91.1425, §91.1427, §91.1429, §91.1431, §91.1433, §91.1435, §91.1437, §91.1439, §91.1441, and §91.1443. There are no §91.1419 or §91.1421 sections — if a source cites them, it is wrong.
Two Maintenance Paths — and Why CAMP Is a Choice
The first thing to get right about fractional maintenance is that there are two valid ways to do it, and the regulations do not force you into the heavier one. §91.1411 provides that fractional ownership program aircraft may be maintained under a continuous airworthiness maintenance program under §§91.1413 through 91.1443. The word is "may," not "shall." A program manager that elects CAMP must comply with the whole §§91.1413–91.1443 scheme; a program manager that does not elect CAMP maintains its aircraft under the make-and-model inspection program required by §91.1109.
Path A — §91.1109 Inspection Program
The baseline. The program manager establishes an aircraft inspection program for each make and model of program aircraft and ensures each aircraft is inspected accordingly. Lighter administrative footprint; the airworthiness records still follow the Part 91 §91.417 retention chain.
Path B — §91.1411 CAMP
The heavyweight framework. A maintenance manual, designated required inspection items, a Director of Maintenance and a Chief Inspector, continuing analysis and surveillance, mechanical reporting, and the §91.1439 records-and-retention regime. This is the path large managed fleets run on, and the focus of this guide.
The CAMP concept is the same one Part 135 uses
If a continuous airworthiness maintenance program sounds familiar, that is because the same architecture — manual, required inspection items, airworthiness release, continuing analysis and surveillance, detailed records — is the model larger Part 135 certificate holders use under §135.411(a)(2) and §135.421 et seq. The Subpart K CAMP sections are deliberately parallel. If you already understand a Part 135 CAMP and its recordkeeping, the fractional version will read as a close cousin. The records taxonomy is nearly identical; only the cite numbers and the operating context change.
§91.1413 — Where Airworthiness Responsibility Sits
Once a program elects CAMP, §91.1413 ("CAMP: Responsibility for airworthiness") puts the program manager primarily responsible for the airworthiness of the program aircraft — airframes, aircraft engines, propellers, rotors, appliances, and parts — and for performing maintenance, preventive maintenance, and alterations in accordance with Subpart K and the program manager's manual, including repairing defects that occur between regularly scheduled maintenance. That is a meaningful shift: in ordinary Part 91, the owner or operator carries the maintenance responsibility under §91.405. Under a fractional CAMP, the program manager carries it.
The DOM / Chief Inspector requirement
§91.1413 requires the program manager that elects CAMP to employ the personnel to administer the program, and the structure of the rule and its manual requirements turn on two named roles:
- A Director of Maintenance — a certificated mechanic with airframe and powerplant ratings — responsible for the maintenance program.
- A Chief Inspector — also a certificated mechanic with airframe and powerplant ratings — responsible for the required-inspection function.
- The two roles cannot be held by the same person. Separating "do the work" from "buy back the work" is the structural control the whole CAMP is built on.
The manager does not have to perform every wrench-turn in-house. It may arrange for another person or organization — typically a part 145 repair station — to perform maintenance, preventive maintenance, or alterations, provided the work is done in accordance with the program manager's manual. But responsibility does not move with the work: the program manager remains primarily responsible for airworthiness regardless of who holds the wrench. That is why the contract-maintenance paper trail matters so much; the same principle drives our Part 135 contract-maintenance records guide.
§91.1423 — if you do the work in-house, the organization has to be documented and separated
§91.1423 ("CAMP: Maintenance organization") requires a program manager that performs any of its maintenance, preventive maintenance, alterations, or required inspections using its own personnel to have an organization adequate to perform the work. Where the same organization performs both required inspections and other maintenance, it must separate the required-inspection function from the other maintenance at an organizational level below the level of overall responsibility. In records terms, the org chart and the authority assignments in the manual have to actually reflect that separation — an inspector who reports to the person whose work they sign off is a finding.
The Manual (§91.1427) and Required Inspections (§91.1429)
Two sections do most of the work of turning a CAMP into a records system: the manual requirement and the required-inspection-personnel requirement. They are the difference between "we maintain our aircraft well" and "we can prove, on paper, that the right person inspected the right item the right way."
§91.1427 — The Maintenance Manual
§91.1427 ("CAMP: Manual requirements") requires the program manager to put its maintenance program and procedures in a manual, in a format acceptable to the Administrator that is retrievable in the English language. The manual must include, among other things:
- The program manager’s organization and the methods for performing routine and non-routine maintenance, preventive maintenance, and alterations.
- A designation of the items of maintenance and alteration that must be inspected (the required inspection items), including at least those that could endanger safe operation if done improperly or with improper parts.
- The procedures for, and the persons authorized (by occupational title) to perform, required inspections.
- Procedures to reinspect work that was rejected and later reworked.
- Standards, limits, and calibration procedures for inspection tools and equipment.
- Safeguards so a person who performs work cannot perform the required inspection of that same work, and so an inspection finding cannot be overruled except by a higher level of authority.
§91.1429 — Required Inspection Personnel (RII)
§91.1429 ("CAMP: Required inspection personnel") requires that each person who performs a required inspection be appropriately certificated, properly trained, qualified, and authorized to do so, and that required inspections be performed under the supervision and control of the chief inspector. Critically, no person may perform a required inspection of work that person performed — the separation the manual designs has to hold in practice. The program manager must maintain, and keep current, a listing of the persons who have been trained, qualified, and authorized to conduct required inspections, identifying them by name, occupational title, and the inspections they are authorized to perform. That authorized-inspector list is itself a compliance record the FAA reviews.
§91.1431 — Continuing Analysis and Surveillance (CASS)
§91.1431 ("CAMP: Continuing analysis and surveillance") requires the program manager to establish and maintain a system for the continuing analysis and surveillance of the performance and effectiveness of its inspection program and its maintenance, preventive maintenance, and alteration program, and for the correction of any deficiency in those programs — regardless of whether the programs are carried out by the manager or another person. In plain terms, the CAMP has to watch itself and document that it does. The CASS findings, the corrective actions, and the program changes they drive are records, and a CASS file that is empty or stale is one of the more common deeper-audit findings because it implies the self-check is not really running.
§91.1439 — The Maintenance Records and How Long to Keep Them
§91.1439 ("CAMP: Maintenance recording requirements") is the heart of the documentary obligation. It splits the records into two buckets — the work records that show the airworthiness release requirements were met, and the permanent status records that describe the current airworthiness state of each item — and it gives each bucket a different retention rule.
| Record §91.1439 requires | Paragraph | Minimum Retention |
|---|---|---|
| Records to show §91.1443 airworthiness-release requirements were met | (a)(1) | Until the work is repeated/superseded, or 1 year after performed |
| Records of the last complete overhaul of each item | (a)(1) | Until superseded by work of equivalent scope and detail |
| Total time in service — airframe, each engine, propeller, rotor | (a)(2) | Transferred with the aircraft when sold |
| Current status of life-limited parts of each item | (a)(2) | Transferred with the aircraft when sold |
| Time since last overhaul of each item requiring overhaul | (a)(2) | Transferred with the aircraft when sold |
| Current inspection status, incl. time since last inspection | (a)(2) | Transferred with the aircraft when sold |
| Current status of applicable airworthiness directives (date + method) | (a)(2) | Transferred with the aircraft when sold |
| List of current major alterations and repairs to each item | (a)(2) | Transferred with the aircraft when sold |
The retention distinction that trips operators
The (a)(1) work records roll over — they can be discarded once the work is repeated or superseded, or one year after it was performed (overhaul records persist until superseded by equivalent work). The (a)(2) status records do not roll over on a clock at all; they are kept and must be transferred with the aircraft when it is sold under §91.1441. Treating the status records like the work records — and purging them on a one-year cycle — destroys the continuity an aircraft needs to prove its life-limited-parts status and its airworthiness-directive compliance history. These six categories are the same airworthiness backbone you see in §91.417 and §135.439; the fractional CAMP just routes them through §91.1439.
It is worth being precise about what §91.1439 is not. It is not the same as the underlying entry-content rule. Every individual maintenance, preventive-maintenance, or alteration action still has to be recorded with the content specified by §43.9 (and inspections are recorded under §43.11 — §43.9(c) expressly excludes them). §91.1439 sits on top of that, telling the program which records to assemble and how long to hold them. Both layers have to be right.
Related Aviation Compliance Reading
§91.1443 — The Airworthiness Release, the Document That Returns the Aircraft to Service
If §91.1439 is the records system, the §91.1443 ("CAMP: Airworthiness release or aircraft maintenance log entry") release is the keystone record inside it. After maintenance, preventive maintenance, or alterations are performed under the CAMP, the program manager must prepare an airworthiness release or make the appropriate entry in the aircraft maintenance log before the aircraft is returned to service.
What the §91.1443 release must certify
The airworthiness release or log entry must certify that —
- The work was performed in accordance with the requirements of the program manager’s manual;
- All items required to be inspected were inspected by an authorized person who determined that the work was satisfactorily completed;
- No known condition exists that would make the aircraft unairworthy; and
- So far as the work performed is concerned, the aircraft is in condition for safe operation.
Who signs it
The §91.1443 airworthiness release or log entry must be signed by an authorized certificated mechanic. There is one express exception: when the maintenance, preventive maintenance, or alterations were performed by a part 145 repair station, the approval for return to service or log entry may instead be signed by a person authorized by that repair station. Either way, the signature is the legal hinge — it is the moment a documented set of completed, inspected work becomes an airworthy aircraft. A release missing the certification language, the authorized signature, or a required-inspection sign-off is not a paperwork nit; it means the aircraft was returned to service without a valid release.
The release ties the whole record chain together
§91.1439(a)(1) requires keeping "all the records necessary to show that all requirements for the issuance of an airworthiness release under §91.1443 have been met." That sentence is why the release is the anchor: it pulls in the §43.9 entries, the required-inspection sign-offs under §91.1429, the parts traceability, and the manual procedures, and binds them into one returnable-to-service package. When an inspector audits a fractional CAMP, the most efficient path is to pick a flight, find the last release, and work backward through everything the release implies. If any link is missing, the release does not hold.
§91.1415 & §91.1417 — Mechanical Reporting as a Record Stream
A CAMP does not just maintain aircraft; it reports on how they are performing. Two Subpart K sections create recurring report obligations, and both produce records that have to reconcile against the maintenance discrepancy log.
§91.1415 — Mechanical Reliability Reports (72 hours)
§91.1415 ("CAMP: Mechanical reliability reports") requires the program manager to report each failure, malfunction, or defect in an aircraft that concerns the conditions the section lists — among them fires during flight, false fire warnings, engine exhaust-system failures that cause damage, flight-control-system malfunctions, in-flight engine shutdowns, propeller feathering or governing-system failures, and aircraft structural damage requiring major repair — to the FAA Flight Standards office that issued the program manager's management specifications. Each report of occurrences during a 24-hour period must be mailed or transmitted to that office within the next 72 hours. These are close cousins of the service difficulty reports a Part 135 operator files.
§91.1417 — Mechanical Interruption Summary Report (monthly)
§91.1417 ("CAMP: Mechanical interruption summary report") requires the program manager to submit, before the end of the 10th day of the following month, a summary report of interruptions to flight operations, unscheduled aircraft changes, and unscheduled flight interruptions caused by known or suspected mechanical difficulties not required to be reported under §91.1415, together with the number of propeller featherings in flight (listed by type, and excluding those for training or demonstration). The report goes to the same Flight Standards office that issued the management specifications.
The records angle is the reconciliation. An FAA reviewer who suspects under-reporting will compare the discrepancy log and the maintenance records against what was actually reported under §91.1415 and §91.1417. A grounding event that shows up in the maintenance log but never in a report — or a feathering that appears in neither — is the kind of inconsistency that turns a routine surveillance review into a deeper look. Keeping the report stream and the underlying records aligned is, again, a documentation discipline.
Not sure whether your CAMP records — releases, status records, inspector roster, mechanical reports — would survive a surveillance review? Run the readiness check.
The Fractional-CAMP Record Set an Inspector Expects to See
Pulling the maintenance-program sections together, here is the documentary spine of a defensible fractional CAMP. Each item maps to a specific Subpart K hook, and none of them is optional once the program has elected CAMP.
The CAMP maintenance manual
§91.1427Program, procedures, RII designations, inspection authorities, calibration standards — the master document.
DOM & Chief Inspector designations
§91.1413Two A&P-certificated roles, held by different people; the org and authority assignments in the manual.
Authorized required-inspection personnel list
§91.1429Current roster of who may perform required inspections, by name, title, and scope.
Continuing analysis & surveillance (CASS) file
§91.1431The self-check: findings on program effectiveness and the corrective actions taken.
Airworthiness releases / maintenance log entries
§91.1443A signed release for every return to service, certifying the work, inspections, and safe-operation condition.
Permanent airworthiness status records
§91.1439(a)(2)Total time, life-limited parts, time since overhaul, inspection status, AD status, major alterations.
Work records / overhaul records
§91.1439(a)(1)Everything proving the §91.1443 release requirements were met; retained 1 year / until superseded.
Mechanical reliability & interruption reports
§91.1415 / §91.1417The 72-hour reports and the monthly summary — and their reconciliation to the discrepancy log.
Where fractional CAMPs lose records — and what it costs
The failures are almost always documentary rather than mechanical:
- Permanent §91.1439(a)(2) status records purged on the one-year work-record clock, breaking life-limited-parts or AD continuity.
- A required-inspection sign-off missing on a release, so the §91.1443 certification that "all items required to be inspected were inspected" cannot be supported.
- An authorized-inspector list (§91.1429) that was never updated as personnel changed, leaving inspections signed by someone not on the current roster.
- A grounding or feathering in the maintenance log that never made it into a §91.1415 or §91.1417 report — a reconciliation gap an auditor will find.
- A CASS file (§91.1431) that is empty, implying the program is not actually monitoring its own effectiveness.
Each of these is a tracking-and-retention failure, not a flying failure — and under 14 CFR §13.301 the FAA's civil-penalty exposure for violations on or after December 30, 2024 runs up to $75,000 per violation for a person other than an individual or small business (and $1,875 for an individual or small business concern). The same surveillance discipline that protects a charter binder applies here; see how to prepare for an FAA surveillance audit.
Keep the entire fractional-CAMP record set audit-ready in one place
FileFlo is a compliance document intelligence platform — a read-only proof layer that classifies, indexes, and tracks the records a fractional maintenance program is required to keep. Upload your CAMP manual, airworthiness releases, status records, authorized-inspector list, CASS findings, and mechanical reports, and FileFlo:
- Classifies each document against the governing section (§91.1427, §91.1429, §91.1439, §91.1443, §91.1415/§91.1417)
- Tracks the §91.1439 retention logic — flagging permanent status records that must never be purged and work records approaching their one-year floor
- Surfaces airworthiness releases missing a required-inspection sign-off or an authorized signature
- Assembles an audit-ready record binder organized by CFR section for any FAA surveillance review
FileFlo sits alongside your CAMP, your Director of Maintenance, and your maintenance provider — it does not perform maintenance, sign airworthiness releases, run required inspections, or replace your program manager's manual. It keeps the documents that prove your compliance audit-ready. Starter $89/mo · Professional $299/mo · 5-day free trial, no credit card required.
Frequently Asked Questions
Is a continuous airworthiness maintenance program (CAMP) mandatory for a fractional program?
No. Under 14 CFR §91.1411, fractional ownership program aircraft may be maintained under a continuous airworthiness maintenance program (CAMP) under §§91.1413 through 91.1443 — the rule uses permissive language, not a mandate. A program manager that elects CAMP must then comply with the entire §§91.1413 through 91.1443 scheme. A manager that does not elect CAMP satisfies its maintenance obligation through the make-and-model aircraft inspection program required under §91.1109. This maintenance-program guide covers the CAMP path specifically; the broader fractional-program structure (management specifications, the owner/manager operational-control split, and the §91.1027 operations recordkeeping rule) is covered in our separate Part 91 Subpart K fractional ownership records guide.
What records does §91.1439 require a CAMP program manager to keep?
14 CFR §91.1439 requires the program manager to keep all records necessary to show that the requirements for issuing an airworthiness release under §91.1443 have been met, plus records containing the total time in service of the airframe, each engine, each propeller, and each rotor; the current status of life-limited parts of each airframe, engine, propeller, rotor, and appliance; the time since last overhaul of each item installed on the aircraft that is required to be overhauled on a specified time basis; the current inspection status of the aircraft, including the time since the last inspection required by the inspection program; the current status of applicable airworthiness directives, including the date and methods of compliance; and a list of current major alterations and repairs to each airframe, engine, propeller, rotor, and appliance. These are the same six categories of permanent status records that appear in §91.417 and §135.439 — the airworthiness backbone of any aircraft record.
How long must §91.1439 records be retained?
Under 14 CFR §91.1439, the records required by paragraph (a)(1) — those showing the airworthiness release requirements were met — must be retained until the work is repeated or superseded by other work, or for one year after the work is performed. The records of the last complete overhaul of each item must be retained until the work is superseded by work of equivalent scope and detail. The status records required by paragraph (a)(2) — total time in service, life-limited parts status, time since overhaul, inspection status, AD compliance status, and the list of major alterations — must be retained and transferred with the aircraft when it is sold. In short: the detailed work records roll over on a one-year/until-superseded basis, but the permanent status records live with the aircraft.
Who can sign the airworthiness release under §91.1443?
Under 14 CFR §91.1443, after maintenance, preventive maintenance, or alterations are performed under the CAMP, the program manager must prepare an airworthiness release or make the appropriate maintenance log entry. That release or entry must certify that the work was performed in accordance with the program manager’s manual, that all items required to be inspected were inspected by an authorized person who determined the work was satisfactorily completed, that no known condition exists that would make the aircraft unairworthy, and that, so far as the work performed is concerned, the aircraft is in condition for safe operation. The release or entry must be signed by an authorized certificated mechanic. There is one exception: when the work is performed by a part 145 repair station, the approval for return to service may be signed by a person authorized by that repair station. The signed airworthiness release is the single most important record the program produces — it is the document that returns the aircraft to service.
What is a required inspection item (RII) under a fractional CAMP?
Under the CAMP scheme, the program manager’s manual must designate the maintenance and alteration items that must be inspected — the required inspections — including at least those that could result in a failure, malfunction, or defect endangering safe operation if not performed properly or if improper parts are used. 14 CFR §91.1429 (CAMP: Required inspection personnel) requires that persons performing required inspections be appropriately certificated, properly trained, qualified, and authorized, that they work under the supervision and control of the chief inspector, and — critically — that a person may not perform a required inspection on work that person performed. The program manager must maintain a current listing of the persons authorized to perform required inspections. The separation between the mechanic who did the work and the inspector who buys it back is the core control of the whole program, and the records have to prove it held on every required inspection.
What mechanical problems must a fractional CAMP report to the FAA, and how fast?
14 CFR §91.1415 (CAMP: Mechanical reliability reports) requires the program manager to report each failure, malfunction, or defect in an aircraft concerning a list of specified conditions — such as fires during flight, false fire warnings, engine exhaust system failures, flight-control-system malfunctions, in-flight engine shutdowns, propeller feathering or governing failures, and structural damage requiring major repair — to the FAA Flight Standards office that issued the program manager’s management specifications. Each report of occurrences during a 24-hour period must be mailed or transmitted to that office within the next 72 hours. Separately, §91.1417 (CAMP: Mechanical interruption summary report) requires a monthly summary of mechanically caused interruptions and unscheduled changes, and of in-flight propeller featherings, submitted before the end of the 10th day of the following month. These reports are themselves compliance records, and the underlying discrepancy entries must reconcile to them.
What happens to the maintenance records when a fractional aircraft is sold?
Under 14 CFR §91.1441 (CAMP: Transfer of maintenance records), when a fractional program aircraft is removed from the program, the program manager must transfer to the purchaser, at the time of the sale, the §91.1439(a)(2) status records (total time in service, life-limited parts status, time since overhaul, inspection status, AD compliance status, and the list of major alterations and repairs) in plain language or in a coded form that provides for the preservation and retrieval of information. The §91.1439(a)(1) work records must also go with the aircraft, although the purchaser may permit the program manager to keep physical custody of them — but even then the purchaser remains responsible for making those records available to the FAA. Continuity of the airworthiness record across a sale is a recurring weak point, because a status record that does not follow the aircraft can strand a life-limited part or an AD with no documented compliance history.
Does the CAMP require a written maintenance manual, and what goes in it?
Yes. 14 CFR §91.1427 (CAMP: Manual requirements) requires the program manager to put its maintenance, preventive maintenance, and alteration program and procedures in a manual, in a format acceptable to the Administrator that is retrievable in the English language. The manual must include the program manager’s organization and the methods for performing routine and non-routine maintenance; the designation of the required inspection items; the procedures for and the persons (by occupational title) authorized to perform required inspections; procedures to reinspect work that was rejected and reworked; the standards, limits, and calibration procedures for inspection equipment; procedures to ensure all required inspections are performed; safeguards so that a person who performs work cannot perform the required inspection of that same work; and procedures so that no required inspection finding can be overruled except by a higher level of authority. The manual is the master document an FAA inspector reads first, and every maintenance entry and airworthiness release is checked back against it.
Related Aviation Compliance Guides
Part 91 Subpart K Fractional Ownership Records
The companion guide — program structure, management specs, operational control, and §91.1027 operations records
Part 135 Maintenance Recordkeeping & CAMP
The Part 135 CAMP this fractional version is modeled on — nearly identical records taxonomy
Part 43.9 Maintenance Record Entry Requirements
The entry-content rule every maintenance action under the CAMP must satisfy
Airworthiness Directive Compliance Records
The AD status record §91.1439(a)(2) requires you to keep and transfer with the aircraft
Life-Limited Parts Records Requirements
The life-limited-parts status that the §91.1439 permanent records must continuously prove
Part 91 Aircraft Records Requirements
The §91.417 airworthiness record chain the non-CAMP §91.1109 path runs on
Prove your fractional CAMP is audit-ready — before the FAA asks
FileFlo classifies your CAMP records against §91.1427, §91.1429, §91.1439, and §91.1443, tracks the difference between permanent status records and one-year work records, and assembles an audit-ready binder organized by CFR section. Keep your manual, airworthiness releases, status records, and inspector roster current and provable — all in one compliance record set.
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