Communication qualification
DO-160G environmental qualification evidence support for communication equipment
This support reviews a communication radio's DO-160G environmental qualification evidence and confirms the declared categories fit the equipment on the bus and in the location it is installed. It suits VHF and HF radios, intercom and audio panels, and datalink units. A specialist reconciles the qualification form to the installation and gives weight to the electrical-interface sections a radio depends on: power input, voltage spike, audio susceptibility, and induced signal. You receive a standards map by DO-160G section, a gap list ordered for closure, and a route to clear each open item before submittal.
When this review is needed
- A radio is entering authorization and its environmental qualification needs a read against the installation.
- The unit is moving to an airframe with a different electrical system category than it was qualified for.
- A finding asks whether the power input or voltage spike categories are supported at the declared level.
- An audio panel is fielded near noisy loads and its audio susceptibility category needs a second look.
The problem
A radio's DO-160G risk sits on the electrical interface. Power input, voltage spike, audio frequency conducted susceptibility, and induced signal susceptibility all depend on the aircraft's electrical system and the wiring the unit shares, and a radio qualified against one power category can be misstated for an aircraft with a different bus. The audio path adds its own exposure: an intercom or audio panel picks up conducted noise that a category chosen generically may not cover. The form can look filled while the electrical categories were set for a different electrical system.
What gets reviewed
- The environmental qualification form reconciled to the radio's installation
- Power input categories matched to the aircraft's electrical system
- Voltage spike and induced signal susceptibility categories for the installed wiring
- Audio frequency conducted susceptibility for intercom and audio-path equipment
- Temperature, altitude, and vibration categories for the mounting location
- The link between the qualification evidence and the installation the approval covers
What gets validated
- Power input categories match the aircraft electrical system the radio is installed on
- Voltage spike and induced signal categories carry test reports at the declared levels
- Audio frequency conducted susceptibility covers the noise environment of the audio path
- Temperature, altitude, and vibration categories fit the equipment's location
- The installation assumptions agree with the certification basis for the approval
Evidence normally required
- The DO-160G environmental qualification form for the communication unit
- Test reports supporting the electrical-interface and physical categories
- The aircraft electrical system description for the target installation
- The wiring and audio-path routing assumptions for the installation
- The certification basis and any prior findings on the qualification
Common discrepancies
- A power input category that does not match the target aircraft's electrical system
- A voltage spike category on the form with no supporting test report
- An audio susceptibility category understated for a noisy installation
- A vibration category carried from a mounting different than the current one
What is at stake
An unsupported power or susceptibility category draws a finding that can force retest, and an understated audio susceptibility category can leave an intercom carrying audible noise in service, which crews report as a nuisance that is awkward to chase down. Because radios and audio panels are fleet-common, a misstated electrical category repeats across every installation. Reconciling the electrical-interface sections to the aircraft's system before submittal is where these problems stay cheap.
Move from findings to resolution
Identify gaps against the means of compliance.
How the work runs
Fix the electrical system
Establish the aircraft power characteristics and wiring the radio is installed against.
Read the interface sections
Take the power input, voltage spike, induced signal, and audio susceptibility categories and note each level.
Match and reconcile
Confirm each category has a test report and matches the target electrical system and audio path.
Order the gaps
Rank unsupported and understated categories by closure effort so any retest is scheduled before submittal.
What the buyer receives
- A standards map tying each category to its DO-160G section and test report
- A gap list ordered by closure effort, with electrical-interface sections called out
- A closure sequence from each unsupported category to the evidence that resolves it
Who uses the output
- Certification leads confirming the radio or audio panel qualification is submittal-ready
- Electrical and test engineers scheduling any power or susceptibility retest the gaps require
- Compliance managers tracking electrical-interface gaps against the approval date
How the work fits into the transaction or program
The mapping runs after environmental testing is nominally complete and before the qualification evidence reaches the authority. It reconciles the electrical-interface categories to the aircraft's system, so a misstated power or susceptibility category surfaces before it repeats across a fleet installation, and its output feeds the communication approval the form supports.
Start with a single asset
Confirm requirements trace through verification.
Jurisdiction-specific considerations
FAA and EASA both accept DO-160G for environmental qualification and both check the electrical-interface categories against the aircraft's power characteristics. The mapping notes where the declared categories hold under one authority's basis but would need restating for the other given the target electrical system.
Regulatory limits
This work maps the qualification evidence to the DO-160G sections and reconciles it to the electrical installation. It does not approve the radio, issue a TSO or STC, determine airworthiness, or replace the authority's acceptance of the qualification.
What this review does not cover
- Conducting or witnessing the electrical and susceptibility tests
- Authoring the qualification form or the test plans
- Issuing an approval or compliance finding for the authority
Specific to this review
- A radio's DO-160G weak point is the electrical interface: power input and voltage spike categories are tied to the aircraft's bus, so they are the ones most often misstated across installations.
- Audio frequency conducted susceptibility is easy to underspecify, and an understated category leaves an intercom carrying audible noise that crews report but is hard to trace.
- Because radios and audio panels are fleet-common, a single misstated electrical category repeats across every aircraft the unit is installed on.
Sources
RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
European Union / EASA. EASA design and production certification, STCs, ETSO authorizations, and EASA Form 1 release.
Frequently asked questions
Does the audio panel really need its own susceptibility check separate from the radio?
Yes, because the audio path has its own exposure to conducted noise that the radio's categories may not cover. Audio frequency conducted susceptibility is checked against the actual installation, since an understated category shows up as audible noise crews will report.
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.