Traceability expectations in aerospace are usually driven by contract, program, and safety criticality, not just a simple “flight” vs “non-flight” label. That said, there are typical patterns.
Typical traceability for flight hardware
For parts that will be installed on aircraft or spacecraft (line-replaceable units, structural components, engine parts, flight controls, etc.), you should assume a need for:
- Full genealogy from raw material to installed configuration, including:
- Heat/lot of raw material and test reports (mill certs)
- All special processes (plating, heat treat, NDI, welding, bonding), with certs and process parameters as required by contract
- Tooling, fixtures, and gages that affect key characteristics where required by customer or internal procedures
- Operator, equipment, and date/time for critical operations where specified
- Configuration traceability:
- Which part revision was built, under which engineering change baseline
- Which serial numbers are installed in which higher-level assemblies and final tail/ship/satellite numbers
- Quality and inspection traceability:
- AS9102 FAI records where applicable
- Inspection results for key and critical characteristics, tied to specific parts or serial numbers
- NCRs, concessions, and repair records linked to the affected serials and final disposition
- Supply chain traceability:
- Approved supplier status and certs for each procured item
- Lot and serial number linkage from supplier into your work orders and on to the final product
On many programs, flight hardware traceability is effectively “serial-level, end-to-end”: you can identify every material lot, process, inspection, and NCR that touched a given serialized unit, and you can trace each component into a particular aircraft or vehicle.
Typical traceability for non-flight aerospace parts
“Non-flight” parts span a wide range: ground support equipment, tooling, test rigs, training hardware, prototypes, shop aids, and internal spares. Traceability here is more variable and driven by risk and contracts.
Common patterns include:
- Lot-level rather than full serial-level genealogy:
- Material certs and basic process traceability kept at heat/lot or batch level
- Limited linkage between individual serials and specific process parameters unless the part is safety-related or can affect flight hardware
- Configuration and change control still applied:
- Version/revision tracking, controlled BOMs, and ECOs are usually still required
- Traceability of major changes that can affect test results, interface dimensions, or handling of flight hardware
- Targeted traceability for risk-sensitive non-flight assets:
- Ground support equipment or tooling that interfaces with flight hardware may need near-flight-level traceability for calibration, maintenance, and configuration
- Test equipment that generates certification data often requires traceability of calibration status, software versions, and as-run test conditions
A non-flight label does not automatically mean “light” traceability. If a non-flight item can influence airworthiness (for example by handling or measuring flight parts), many OEMs expect traceability that is only slightly relaxed from flight hardware.
Standards and contracts drive the real requirement
In practice, the required level of traceability is set by:
- Customer flowdowns and contracts (OEM, Tier 1, or government)
- AS9100 and AS9102 requirements as interpreted by your QMS and auditors
- Safety and criticality classification (primary structure, pressure-containing, flight control, engine, vs cosmetic or low-risk)
- Regulatory program type (commercial transport, military, experimental, space, MRO vs new production)
- Internal risk appetite and recall strategy (what you would need to know to surgically contain an issue)
Two common patterns:
- High-criticality flight parts: serial-level, end-to-end genealogy, including material, processes, inspections, NCRs, and installed configuration
- Lower-risk and many non-flight parts: lot-level traceability plus full configuration control, with some serial-level tracking for tooling, test equipment, or parts that could compromise flight hardware
Because interpretations differ by OEM, program, and auditor, it is risky to design systems around a generic rule. The safe approach is to map traceability expectations per part family or classification and tie them explicitly to requirements documents.
System and process implications in brownfield environments
Achieving these levels of traceability is usually constrained by existing ERP, MES, PLM, and QMS stacks and by limited downtime. Full system replacement to get “perfect” traceability often fails in aerospace because of:
- Qualification and validation burden for new systems that influence airworthiness or quality records
- Downtime risk for production and MRO lines that cannot be easily stopped and requalified
- Integration complexity with legacy machines, paper travelers, and supplier portals
- Long equipment and program lifecycles that make rip-and-replace expensive and disruptive
Most plants instead extend what they have:
- Overlay MES or digital traveler solutions on top of ERP to capture as-built data, operator, equipment, and process parameters for flight hardware
- Enhance PLM/QMS integration to keep configuration and change control synchronized with shop-floor records
- Digitize travelers and work instructions selectively for high-criticality flight parts first, then expand to non-flight areas where risk or rework is high
- Define clear data ownership (which system owns serials, which owns NC records, which holds inspection data) to avoid gaps and double entry
The traceability level you define on paper is only credible if your systems, integrations, and validation state can consistently produce audit-ready evidence for that level across the part lifecycle.
Practical way to differentiate flight vs non-flight traceability
Instead of relying solely on the “flight” label, many organizations use a classification scheme such as:
- Class 1: Safety-critical flight hardware (highest traceability, serial-level genealogy, full AS9102, strict configuration linkage)
- Class 2: Flight but lower criticality (serial-level on assemblies, lot-level allowed for some components where acceptable)
- Class 3: Non-flight items that interface with flight hardware (tooling, GSE, test stands; strong configuration and calibration traceability)
- Class 4: General non-flight (basic lot-level traceability, full configuration and change control, targeted serial tracking where justified)
This allows you to align traceability depth, data capture, and system investment with actual risk and contractual expectations, rather than applying a single blanket rule.
