Field approval data
DO-160 qualification report support for an FAA field approval
This review checks the DO-160G environmental qualification report supporting a field-approval package, confirming that the categories tested, the limits applied, and the installation assumptions behind them match where the equipment is actually installed. It is run by or for a modifier or operator relying on an environmental report to support an installed alteration, before the report goes to an inspector. It looks for qualification categories that understate the real installation environment, test limits below what the location demands, and assumptions in the report that the actual installation does not hold to. You get a gap assessment, an evidence map from each environmental category to its test result, and a closure plan for the categories that do not cover the installation.
When this review is needed
- An installed alteration relies on a DO-160G report and the tested categories have to match the installation zone.
- Equipment qualified for one location is being installed somewhere with a harsher environment.
- The report's installation assumptions, such as cooling or mounting, differ from the actual installation.
- A qualification report from the equipment supplier has to be shown adequate for this specific aircraft location.
The problem
A DO-160G report proves what the equipment survived in the test lab, not what it faces where it is installed, and the two only match if the categories were chosen against the real installation zone. Equipment is often qualified to a supplier's general categories or to a prior installation's environment, then reused on an alteration in a hotter bay, a higher-vibration mount, or a zone with different lightning and power characteristics. The report reads as complete qualification while quietly covering a milder environment than the one the equipment now lives in.
What gets reviewed
- Each environmental category in the report matched to the actual installation zone and conditions
- Test limits confirmed to meet or exceed what the installation location demands
- Installation assumptions in the report, such as cooling, mounting, and orientation, checked against the real installation
- Categories relevant to the location, including temperature, vibration, power input, and lightning, confirmed present
- Qualification carried over from a supplier report or prior installation checked for applicability here
- Each category's claim traced to the specific test result that supports it
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
- Every environmental category the location requires is present and tested in the report
- Test limits meet or exceed the conditions at the actual installation zone
- The report's installation assumptions match the real cooling, mounting, and orientation
- Categories carried from a supplier or prior report are shown applicable to this installation
- Each category claim traces to a specific test result rather than a summary statement
Evidence normally required
- The DO-160G qualification report for the equipment
- The installation definition, including zone, cooling, mounting, and orientation
- The environmental conditions expected at the installation location
- Any supplier qualification data or prior-installation report being relied on
- The alteration description defining where and how the equipment is installed
Common discrepancies
- A qualification category tested to a milder environment than the installation zone presents
- A missing category, such as lightning or power input, that the location actually requires
- An installation assumption in the report, like forced-air cooling, that the real installation does not provide
- A supplier report reused without showing its categories apply to this specific location
What is at stake
If a qualification category understates the installation, the alteration is supported by a report that does not actually cover the environment, and an inspector who catches the mismatch rejects the environmental basis. The correction is not a paperwork edit: closing an under-qualified category can require additional environmental testing at the correct level, which reopens qualification work and delays the approval well past what re-citing evidence would have cost.
How the work runs
Define the installation environment
Establish the zone, conditions, cooling, and mounting the equipment actually faces where it is installed.
Match categories to the zone
Compare each report category and test limit against what the installation location demands.
Test the assumptions
Check the report's installation assumptions against how the equipment is really fitted.
Plan the closures
List categories that fall short and sequence the additional testing or covering data needed.
What the buyer receives
- A gap assessment of environmental categories that do not cover the installation
- An evidence map from each category to the test result that supports it
- A closure plan for the categories requiring re-qualification or additional testing
Who uses the output
- Engineering leads confirming the environmental basis covers the real installation before it reaches an inspector
- Compliance staff reconciling report categories to the installation zone and conditions
- Maintenance leadership confirming installation assumptions match how the equipment is actually fitted
How the work fits into the transaction or program
The DO-160G report is the environmental leg of a field-approval package, and it only supports the alteration if its categories were chosen against the installation rather than a generic or borrowed environment. This review runs before the report reaches an inspector, so an under-qualified category is caught while there is still time to add testing or find covering data, rather than after the inspector rejects the environmental basis and the qualification work has to reopen.
Start with a single asset
Reduce finding cycles by checking the package first.
Jurisdiction-specific considerations
For a field approval an FAA inspector has to be satisfied that the environmental qualification covers the installation, so a DO-160G report has to be shown adequate for this aircraft and zone rather than accepted on the strength of the standard alone. Where the equipment also carries qualification under an EASA route, the review notes where categories accepted there still need to be matched to the FAA field-approval installation before they can be relied on here.
Regulatory limits
The review checks that the environmental report's categories and limits cover the installation. It does not perform or witness DO-160G testing, qualify the equipment, obtain the field approval, or determine that the altered aircraft is airworthy.
What this review does not cover
- Performing or witnessing DO-160G environmental testing
- Developing additional qualification data for an under-covered category
- Any airworthiness determination on the altered aircraft
Specific to this review
- A DO-160G report proves lab survival, not installed adequacy, so its categories only support the alteration if they were chosen against the real installation zone.
- Reused supplier or prior-installation qualification is the most common source of an under-covered category, because a milder environment gets carried into a harsher one.
- An under-qualified category cannot be fixed on paper: closing it usually means additional environmental testing at the correct level, which reopens qualification work.
Sources
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
Federal Aviation Administration. FAA type certification process, certification basis establishment, and compliance findings.
RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.
European Union / EASA. EASA design and production certification, STCs, ETSO authorizations, and EASA Form 1 release.
Frequently asked questions
Can we reuse the equipment supplier's DO-160 report for this installation?
Only if its categories and limits are shown to cover this installation's environment. A supplier report is often qualified to general or milder conditions than a specific installation zone presents, so reuse depends on matching each category to the actual location. Where the location is harsher, the shortfall usually requires additional testing rather than a re-citation.
Relevant glossary terms
Related pages
Where this fits
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