TSO authorization
DO-160G qualification report support for TSO authorization
A DO-160G qualification report review confirms the environmental categories the article was tested to actually cover the installation it will be used in. Equipment suppliers use it before submission, so a category the report claims is never one the installation exceeds. It checks the declared environmental categories against the intended installation, confirms the test limits and levels match those categories, and finds places where the qualification envelope falls short of where the article is meant to operate. You get a gap assessment on the environmental qualification, a map from each category to its supporting test data, and a closure plan for the categories that need re-test or re-declaration.
When this review is needed
- Environmental testing is complete and the categories in the report have to be checked against the installation before submission.
- The article's intended installation zone changed after testing was planned, and the categories may no longer cover it.
- A category was declared to a lower level to fit a test slot, and the installation environment needs re-checking.
- The environmental qualification form has to be reconciled with the actual test data before it goes in the package.
The problem
Environmental categories are chosen early and tested against, but the installation they are supposed to cover can shift after the plan is set. A category tested to one level reads as passed regardless of whether that level bounds where the article will actually live, and the mismatch between the qualified envelope and the real environment is easy to miss because both the report and the test data look complete on their own.
What gets reviewed
- Declared DO-160G environmental categories checked against the intended installation zone
- Test limits and levels confirmed against the categories the report declares
- The qualification envelope compared to the operating environment the article will see
- Categories declared in the report but not backed by test data at the stated level
- Installation assumptions in the report reconciled with the article's actual use
- The environmental qualification form reconciled to the underlying test reports
Scope this review
Tell us the asset, the event, and the evidence in scope, and we will outline a focused first engagement.
Identify what is missing against the means of compliance.
What gets validated
- Each declared category is supported by test data run to the level that category requires
- The qualified envelope bounds the environment of the intended installation zone
- Test limits in the report match the DO-160G categories the article claims
- Installation assumptions in the report match the article's actual mounting and use
- The qualification form and the detailed test reports state the same categories and levels
Evidence normally required
- The DO-160G test reports and the environmental qualification form
- The intended installation zone and its operating environment
- The declared category list for the article
- Any change to the installation or article since testing was planned
- The article configuration the environmental tests were run against
Common discrepancies
- A declared category with no test data at the level it claims
- A qualification envelope that does not cover the intended installation zone
- An installation assumption in the report that the actual use does not match
- A category on the form that the detailed test report does not support
What is at stake
A qualification envelope that falls short of the installation means the article is not actually qualified for where it will be used, and closing that gap late can require a full re-test on equipment that is otherwise finished. A category declared but not supported by data, or supported at the wrong level, is a finding that stalls the authorization and can force a hardware change if the article cannot meet the level the installation demands.
How the work runs
Read the installation
Establish the environment of the intended installation zone the article must cover.
Check the envelope
Compare the declared categories and levels against that environment.
Match data to categories
Confirm each declared category is backed by test data at the stated level.
Close the shortfalls
List categories needing re-test or re-declaration and sequence the work.
What the buyer receives
- A gap assessment on the environmental qualification coverage
- A map from each declared category to its supporting test data
- A closure plan for categories needing re-test or re-declaration
Who uses the output
- Certification leads presenting environmental qualification to the FAA
- Engineering owners deciding whether a shortfall needs re-test or a design change
- Program managers tracking which categories block the qualification claim
How the work fits into the transaction or program
The DO-160G report is the environmental evidence the compliance matrix cites for qualification requirements, so this review runs after testing and before the matrix is finalized. Its findings feed either a re-test, a re-declaration, or a corrected form, and its coverage map becomes the reviewer's route into the environmental data.
Start with a single asset
Reduce finding cycles by checking the package first.
Jurisdiction-specific considerations
DO-160G is the environmental standard the FAA accepts for the article, so the categories and levels are judged against FAA-accepted use of that standard. The same test data can support qualification under another authority, but the review checks the category set against the FAA basis rather than assuming another authority's expectations match.
Regulatory limits
The review checks that the declared categories are supported and cover the installation. It does not run the environmental tests, judge whether a passing result is technically adequate, or make a finding that the article is qualified.
What this review does not cover
Specific to this review
- A category tested to a given level reads as passed whether or not that level bounds the real installation, so envelope-to-installation matching is the check that actually matters.
- Environmental re-test is among the most expensive gaps to close late, because it needs the finished hardware back on a test rig rather than a document revision.
- The qualification form and the detailed test reports are separate artifacts and drift apart, so a category can read as covered on the form while the report behind it says otherwise.
Sources
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.
RTCA. Objectives and lifecycle data for airborne software assurance, by design assurance level (DAL A-E).
RTCA. Design assurance objectives and lifecycle data for airborne electronic hardware (FPGA/ASIC/PLD).
European Union / EASA. EASA design and production certification, STCs, ETSO authorizations, and EASA Form 1 release.
Frequently asked questions
What happens if a category was tested to too low a level?
If the installation environment exceeds the level the article was tested to, the qualification does not cover the intended use and the category has to be re-tested at the higher level or the installation constrained. The review flags the shortfall early so the choice is made before submission rather than after a finding.
Relevant glossary terms
Related pages
Where this fits
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