FAA parts traceability requirements come from four interlocking sections of Title 14 of the Code of Federal Regulations — Parts 21, 43, 91, and 145 — and they demand that every article installed on a civil aircraft carry an unbroken documentation trail from an FAA-approved production source through every maintenance event, ownership change, and reinstallation for the life of the component. Break that chain and the part is no longer eligible for installation, regardless of its physical condition.
The rules answer three practical questions for anyone handling a part: where did it come from, what has been done to it, and who signed for that work. If the paperwork does not answer all three, the part is a liability.
The Documentation That Must Follow a Part
The single most important traceability document in aviation is FAA Form 8130-3, officially called the Authorized Release Certificate or Airworthiness Approval Tag.1Federal Aviation Administration. FAA Form 8130-3 – Airworthiness Approval Tag It does two jobs: it certifies that a newly produced part conforms to its approved design, and it approves a used part for return to service after maintenance, repair, or overhaul.
The form has to identify the part number, the serial number if there is one, and the part’s current status. That status tells the installer whether the part is new, used, repaired, or overhauled, and whether it is eligible for the intended installation. A part without a properly completed 8130-3 lacks the documentation needed to establish its airworthiness, and installing it opens a traceability gap that can ground the aircraft.
Alongside the 8130-3, a part in service accumulates maintenance record entries under Part 43, airworthiness directive compliance records, and — for life-limited components — a running record of accumulated hours, cycles, or calendar time. All of that has to move with the part when it is removed and reinstalled elsewhere, or with the aircraft when it changes hands.
What a Maintenance Record Entry Must Contain
Every maintenance action produces a record, and 14 CFR 43.9 spells out what has to be in it:2eCFR. 14 CFR 43.9 – Content, Form, and Disposition of Maintenance Records
- A description of the work performed, or a reference to data acceptable to the FAA that describes it.
- The date the work was completed.
- The name of the person who performed the work, if different from the person approving it.
- The signature, certificate number, and type of certificate held by the person approving the work.
One point catches people out. The signature approves only the work described in that specific entry. It does not certify the overall airworthiness of the aircraft or the component as a whole. An annual inspection has its own separate return-to-service requirements, and confusing the two is a common documentation error that produces exactly the kind of gap that makes a part harder to trace later.
Life-Limited Parts Demand the Strictest Tracking
Some components have a hard limit on how long they can be used, measured in hours, cycles, or calendar time. Installing one that has exceeded its limit can be catastrophic, so 14 CFR 43.10 requires that anyone removing a life-limited part from a type-certificated product control it using at least one of five approved methods:3eCFR. 14 CFR 43.10 – Disposition of Life-Limited Aircraft Parts
- A paper or electronic record-keeping system showing part number, serial number, and current life status, updated at each removal.
- A tag or record attached to the part showing the same information.
- A non-permanent marking on the part itself showing current life status.
- A permanent marking to the same effect.
- Physical segregation in a way that deters installation once the part reaches its limit.
There is a narrow exception. If a life-limited part is temporarily removed and reinstalled on the same serial-numbered product, and the product did not accumulate time in service while the part was off, no formal disposition action is required. That covers routine cases like removing a part to reach something behind it.
The industry phrase “back-to-birth traceability” refers to records that follow a part through every owner and installation from the moment it was manufactured. No regulation explicitly requires back-to-birth traceability, but it is the preferred approach for life-limited components because it is the only way to verify accumulated time with certainty. Without that unbroken chain, remaining life is a guess.
Airworthiness Directive Records
Airworthiness directives are mandatory FAA safety corrections, and each one that applies to a component adds a required entry to that component’s records. The AD record has to identify the aircraft or component involved, the AD number and revision date, when the required action was performed, and the specific method of compliance used.4Federal Aviation Administration. AC 39-9 – Airworthiness Directives Management Process For recurring ADs, the record also has to show when the next compliance action is due.
Organizations that stock rotable spare parts need to verify those spares are AD-compliant before installing them. A noncompliant part sitting on a shelf is fine. Installing it on an aircraft that requires compliance is a violation.
How Long Records Must Be Kept
Retention depends on who holds the record. For aircraft owners and operators, 14 CFR 91.417 sets two periods. Records of maintenance work must be retained until the work is repeated or superseded, or for one year after the work is performed, whichever is longer. Records showing the current status of applicable airworthiness directives, life-limited parts, and major alterations must be retained and transferred with the aircraft when it is sold.5eCFR. 14 CFR 91.417 – Maintenance Records
The transfer requirement is the one that costs people money. Sell an aircraft without its AD compliance records and life-limited parts status records and the new owner inherits a traceability problem that can take thousands of dollars to reconstruct, if it can be reconstructed at all.
Certificated repair stations have a simpler rule under 14 CFR 145.219: retain records for at least two years from the date the article was approved for return to service.6eCFR. 14 CFR 145.219 – Recordkeeping Many stations keep records much longer because customers and insurers expect it, but two years is the regulatory floor.
Approved Production Sources
A traceable part starts at an approved production source. The FAA recognizes several pathways, and the most common for replacement parts is the Parts Manufacturer Approval. Under 14 CFR 21.303, a PMA applicant has to demonstrate the design of the article, show it meets airworthiness requirements through testing and analysis, and prove that materials and manufacturing processes conform to the approved specifications.7eCFR. 14 CFR 21.303 – Parts Manufacturer Approval
Other approved sources include parts produced under a Type Certificate holder’s production system, parts produced under a Technical Standard Order Authorization, and standard parts manufactured to established industry specifications. In every case, the part must come with documentation that ties it to the specific approval. A PMA part without paperwork linking it to the PMA holder is, for practical purposes, untraceable.
The manufacturer’s obligations do not end at the loading dock. A Production Certificate holder has to maintain a quality system that ensures every product and article conforms to its approved design and is in safe operating condition, and that identifies, segregates, and either corrects or renders unusable any nonconforming parts.8eCFR. 14 CFR 21.137 – Quality System Certificated repair stations carry a parallel duty under 14 CFR 145.211, which requires a quality control system acceptable to the FAA covering incoming material inspection, preliminary inspection of every article before work begins, and final inspection before return to service.9eCFR. 14 CFR 145.211 – Quality Control System
When the Chain Breaks: Suspected Unapproved Parts
An unapproved part is any component whose origin, condition, or maintenance history cannot be traced to an approved source. That includes counterfeits, parts produced without FAA production approval, and legitimate parts that lost their documentation chain through poor record-keeping. If you cannot verify the history, you cannot confirm the part meets design specifications.
When a suspected unapproved part turns up, the first step is to segregate it so it cannot be installed. The FAA runs a Suspected Unapproved Parts Program and takes reports on FAA Form 8120-11.10Federal Aviation Administration. Suspected Unapproved Parts Program Submitting the form is voluntary, and the FAA has designed it to keep the reporting burden light.11Federal Aviation Administration. Instructions for Completing FAA 8120-11 Suspected Unapproved Parts Report Quality-focused operators file anyway, because the FAA uses the data to identify counterfeit-parts networks and systemic supply-chain problems.
Once a part is confirmed unapproved, it has to be permanently removed from the supply chain. Advisory Circular 21-38 lists effective mutilation methods: grinding, burning, melting, removing a major structural feature, permanent distortion, or cutting with a torch or saw.12Federal Aviation Administration. AC 21-38 – Disposition of Unsalvageable Aircraft Parts and Materials The circular also warns against methods that look destructive but are easily reversed, including stamping, spray paint, tagging, and drilling small holes. Even cutting a part into two pieces is unreliable, because skilled technicians have been known to rejoin two-piece cuts in ways that are hard to detect.
The Rebuilt-Engine Exception
Rebuilt engines are the one situation where a component’s maintenance history can be legally reset. Under 14 CFR 91.421, when an engine is rebuilt by its manufacturer or a manufacturer-approved agency, the owner may use a brand-new maintenance record with no previous operating history.13eCFR. 14 CFR 91.421 – Rebuilt Engine Maintenance Records
The zero-time privilege comes with conditions. The engine has to be completely disassembled, inspected, repaired as needed, reassembled, tested, and approved to the same tolerances as a new engine. Every part used must conform to production drawing tolerances for new parts, or to approved oversized or undersized dimensions. The new record has to include a signed statement of the rebuild date, changes made for AD compliance, and any manufacturer service bulletin changes specifically requested in the bulletin. An overhauled engine keeps its previous history; only a properly rebuilt engine starts fresh.
Who Is Responsible
Under 14 CFR 91.403(a), the aircraft owner or operator is primarily responsible for maintaining the aircraft in airworthy condition, including compliance with airworthiness directives.14eCFR. 14 CFR 91.403 – General You can hire the best mechanics available, but the regulatory responsibility does not transfer with the work order.15Federal Aviation Administration. Understanding Owner/Mechanic Roles and Responsibilities
In practice, that means the owner has to verify that any installed part came with proper documentation, that maintenance records are complete and accurate, and that the records travel with the aircraft at sale. If a mechanic installs a part with incomplete paperwork and the FAA finds it during an inspection, the owner is exposed alongside the mechanic. Traceability is not a filing exercise. It is the evidence that the aircraft is legal to fly.