Type-design packages
DO-160 environmental qualification report support for a type-design package
This review reads the DO-160G environmental qualification report inside a type-design data package and checks that the categories tested match where and how the equipment is actually installed. It compares the declared environmental categories against the installation environment, confirms the test limits meet or exceed what the aircraft imposes, and checks that the installation assumptions written into the qualification hold for the real fit. A certification engineer runs it so the qualification does not undershoot the installation. You get an assessment of category coverage, a list of mismatches between test and installation, and a plan to close them.
When this review is needed
- Environmental testing is done and the applicant needs the categories checked against the real installation zone.
- The equipment is being installed in a zone or aircraft it was not originally qualified for.
- Test limits were set from an early installation assumption that has since changed.
- A reviewer is expected to compare declared categories to the installation and the applicant wants gaps found first.
The problem
Environmental qualification is set early, against an assumed installation, and the installation moves. A box qualified for one temperature range, vibration curve, or lightning zone gets fitted somewhere harsher, and the report still shows the categories it was tested to. The gap between what was tested and what the aircraft actually imposes is not visible in the report alone; it only appears when the categories are read against the installation.
What gets reviewed
- Declared DO-160G environmental categories compared against the installation zone and aircraft
- Test limits checked to meet or exceed the levels the installation imposes
- Installation assumptions in the qualification confirmed against the actual fit
- Category coverage checked across all applicable environmental conditions, including any left untested
- Any test deviations or partial runs assessed for their effect on the declared category
- The equipment configuration tested confirmed to match the configuration being installed
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 applicable DO-160G section has a declared category and a corresponding test result
- The tested category meets or exceeds the installation environment for every applicable condition
- Installation assumptions in the report match the zone, mounting, and interfaces of the real fit
- No applicable environmental condition is left untested or unaddressed
- The tested unit configuration matches the configuration in the type design
Evidence normally required
- The DO-160G qualification test report with the declared categories
- The installation description including zone, mounting, and environmental data
- The environmental qualification plan or test requirements document
- The equipment configuration definition for the tested unit
- Any deviation or retest records against the environmental tests
Common discrepancies
- A declared category lower than the installation zone actually imposes
- Applicable environmental conditions with no test result in the report
- Installation assumptions in the report that no longer match the fit
- A tested unit configuration that differs from the one being installed
What is at stake
A qualification that undershoots the installation is not a paperwork issue; it means the equipment was not shown to survive its environment. A reviewer who catches the mismatch will not accept the requirement as met, and closing it can mean retesting to a higher category, which is slow and expensive. Left uncaught, an undershot category is a latent problem that surfaces in service, in the worst place to find it.
How the work runs
Read the installation
Establish the zone, mounting, and environmental data the equipment will actually see.
Compare categories
Set each declared DO-160G category against the installation and mark where the test falls short.
Check coverage
Confirm every applicable environmental condition has a result and no assumption has gone stale.
Flag retests
Sequence the mismatches and call out any that require retesting to a higher category.
What the buyer receives
- An assessment of category coverage against the installation environment
- A mismatch list where tested categories fall short of the installation
- A closure plan flagging where a retest to a higher category is required
Who uses the output
- Certification leads who present the environmental qualification in review
- Environmental and installation engineers who close category shortfalls
- Configuration managers confirming the tested and installed units agree
How the work fits into the transaction or program
The DO-160G report is one evidence item under the compliance map, and it only counts if the categories match the installation the rest of the package describes. This review reconciles the qualification against the installation data before the report is offered as compliance evidence, so it does not fail when a reviewer compares the two. It follows verification traceability and feeds the compliance map's environmental rows.
Start with a single asset
Reduce finding cycles by checking the package first.
Jurisdiction-specific considerations
FAA and EASA both accept DO-160G as an environmental qualification standard, but each expects the declared categories to be justified against the specific installation, and the installation approval basis can differ between jurisdictions. The review checks the categories against the installation approved for the target authority rather than assuming a common environment.
Regulatory limits
This work checks whether the environmental qualification matches the installation and covers the applicable conditions. It does not perform testing, does not make a compliance finding, and does not determine airworthiness or grant approval. Those remain with the applicant and the authority.
What this review does not cover
- Conducting or repeating environmental qualification testing
- Setting the installation environmental data or defining the zone
- Making the compliance finding for environmental requirements
Specific to this review
- An environmental category is only meaningful next to the installation; a report can be internally correct and still undershoot the zone it will be fitted in.
- Categories set against an early installation assumption drift out of date silently, because the report never changes when the installation does.
- Closing a shortfall usually means retesting to a higher category, so an undershoot found late is one of the more expensive package findings to fix.
Sources
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
Federal Aviation Administration. FAA type certification process, certification basis establishment, and compliance findings.
European Union / EASA. EASA design and production certification, STCs, ETSO authorizations, and EASA Form 1 release.
RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.
Frequently asked questions
Can we reuse an existing DO-160 report for a new installation?
Sometimes, but only after the declared categories are checked against the new installation. If the new zone imposes more than the report was tested to, the qualification undershoots and the requirement is not met until the gap is closed, which may mean a retest to a higher category.
Relevant glossary terms
Related pages
Where this fits
Talk to an engineer who has done this work
We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Talk through the aircraft, records, evidence, deadline, and next useful step.