Aerospace Independent Technical Review
Independent review of aerospace structural analysis and technical evidence
Fidelis Aerospace independently reviews structural analysis, finite element models, fatigue and fracture assessments, substantiation, test evidence, assumptions, margins, and engineering conclusions before a client relies on them for an important hardware decision.
The purpose is not to add another layer of process. It is to challenge the technical basis where an experienced independent perspective can expose hidden assumptions, confirm sound work, identify material gaps, and improve confidence in the decision.
When to engage Fidelis for an independent technical review
- A structural analysis or substantiation package is approaching release, customer submittal, PDR, CDR, test readiness, qualification, or another consequential gate.
- A model or analysis produces results that are difficult to explain, unusually sensitive, or inconsistent with mechanics or test evidence.
- The internal team lacks a senior specialist in the governing discipline and wants an independent check before relying on the result.
- Multiple analysts or disciplines have reached different conclusions and the program needs an evidence-based resolution path.
- A low or negative margin, crack, defect, test discrepancy, or unexpected failure has increased the consequence of an incorrect assumption.
- A supplier-generated or partner-generated analysis must be reviewed before it is accepted into a larger program basis.
What an independent structural review can examine
Configuration, requirements, and loads
Check that the analyzed configuration, interfaces, load cases, factors, environments, and acceptance criteria are traceable to the hardware and decision being supported.
Method applicability and assumptions
Examine whether the selected classical methods, empirical relations, allowables, simplifications, idealizations, and assumptions are appropriate for the governing behavior and evidence available.
Finite element model credibility
Review model purpose, element choice, mesh, connections, boundary conditions, load introduction, contact, nonlinear assumptions, convergence, equilibrium, deformation, sensitivities, and interpretation of stress results.
Failure modes, margins, and structural conclusions
Check whether the governing failure modes have been addressed, demand and capability are compared consistently, margins are traceable, and conclusions follow from the analysis rather than from isolated numerical output.
Fatigue and fracture basis
Review spectra, local stress inputs, material data, fatigue method, crack scenarios, fracture parameters, crack-growth assumptions, residual-strength criteria, inspection assumptions, and life conclusions where those disciplines apply.
Test evidence and correlation
Compare predictions with measured response, fixture behavior, instrumentation, deformation, failure location, or observed anomalies and determine whether discrepancies point to the loads, model, hardware, test setup, or interpretation.
Documentation and technical traceability
Assess whether the report makes the configuration, inputs, assumptions, methods, checks, limitations, results, margins, and conclusions understandable enough for the next reviewer or decision-maker to use responsibly.
Review depth is scoped to the decision
Independent technical review does not automatically mean re-performing every calculation. The review can be focused on a critical assumption, a model, a margin, a fatigue or fracture basis, or an entire integrated substantiation package. Independent calculations or models are added when they materially improve confidence in the governing conclusion.
Information commonly needed
- The hardware configuration, decision, requirements, and review objective.
- Calculations, models, reports, drawings, loads, material data, and relevant customer or program methods.
- Known concerns, open comments, disputed assumptions, prior review findings, or anomalous results.
- Applicable test data, correlation evidence, inspection findings, or nonconformance records.
- The required review depth, schedule, interfaces, and expected form of the findings.
Potential outputs
Outputs may include a review memorandum, comment matrix, marked-up report, model-review findings, independent spot checks, critical-assumption list, risk and evidence summary, disposition recommendations, meeting support, or a written independent technical opinion. Scope and deliverables are defined for the actual decision.
Need an experienced independent check before relying on the analysis?
Share a non-sensitive description of the hardware, the work to be reviewed, the decision it must support, and the required timing. Fidelis can help define an appropriate review depth before sensitive technical data are exchanged.
Frequently Asked Questions
What is an independent technical review?
An independent technical review is an objective examination of engineering work by a qualified reviewer who was not responsible for producing the original basis. The purpose is to test assumptions, methods, calculations, models, evidence, and conclusions before the organization relies on them for a consequential decision.
Is an independent technical review the same as a certification approval?
No. A technical review can strengthen the engineering basis and identify issues before formal approval, but it does not create certification authority, DER authority, approval-holder authority, or another compliance role that Fidelis has not been delegated.
Can Fidelis review only an FEA model?
Yes. A review can focus on a finite element model, a classical calculation, a fatigue or fracture assessment, a report, a test-correlation problem, or an integrated package. The important point is to define what decision the reviewed work must support.
Will Fidelis issue findings even if the analysis is acceptable?
Yes. The objective is an independent evidence-based review, not to manufacture criticism. Findings can include accepted approaches, confirmed strengths, limitations, open risks, required corrections, and recommended improvements in proportion to what the evidence supports.