Environmental qualification

DO-160 Section 20 support for RF susceptibility levels that match the HIRF case

emc engineer, qualification engineer, certification liaisons use this page when HIRF compliance planning for an installation. EE reviews category selection against the aircraft-level HIRF environment and equipment criticality, modulation and dwell choices in the test procedures, monitoring adequacy during exposure (what counts as susceptibility) with the baseline data and cited standards or rules. The buyer receives a mapped record set, unsupported-claim log, missing-data request list, and action plan that separates complete evidence from items needing specialist judgment.

What gets reviewed

Compare category selection against the aircraft-level HIRF environment and equipment criticality against the claim it supports.
Trace modulation and dwell choices in the test procedures against the claim it supports.
Challenge monitoring adequacy during exposure (what counts as susceptibility) against the claim it supports.
Reconcile link from equipment-level results to the aircraft HIRF compliance argument against the claim it supports.
Confirm approval basis against the claim it supports.
Index configuration definition against the claim it supports.

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

The review notes that evidence link: category selection against the aircraft-level HIRF environment and equipment criticality fails review if the cited record cannot be tied to the current baseline.
Limit carryover: modulation and dwell choices in the test procedures fails review if the cited record cannot be tied to the current baseline.
Source control: monitoring adequacy during exposure (what counts as susceptibility) fails review if the cited record cannot be tied to the current baseline.
Closure owner: link from equipment-level results to the aircraft HIRF compliance argument fails review if the cited record cannot be tied to the current baseline.
Configuration match: approval basis fails review if the cited record cannot be tied to the current baseline.

Evidence normally required

Test file: category selection against the aircraft-level HIRF environment and equipment criticality
Analysis note: modulation and dwell choices in the test procedures
Manual source: monitoring adequacy during exposure (what counts as susceptibility)
Configuration item: link from equipment-level results to the aircraft HIRF compliance argument
Closure evidence: approval basis
Baseline record: configuration definition

Common discrepancies

Installer issue: equipment tested at levels below the internal environment the aircraft HIRF analysis assumes.
Buyer concern: susceptibility judged only by hard resets while parameter corruption goes unmonitored.
Program risk: category letters transcribed into installation documents without the qualifying conditions.
Authority question: baseline does not match the delivered records.

How the work runs

Frame 160 Section

Confirm the exact event, affected file set, buyer role, and decision standard before any category selection against the aircraft-level hirf environment and equipment criticality is treated as sufficient.

Trace Support Evidence

Walk the named evidence from index entry to source artifact and mark where the trail supports, conflicts with, or fails to answer the page-specific question.

Sort Levels Match

Group exceptions by closure route: document retrieval, data correction, engineering disposition, authority response, or contractual decision.

Package Case Environmental

Deliver the exception list, evidence map, and owner sequence in a form that can move directly into remediation, submittal cleanup, or transaction negotiation.

What the buyer receives

The review notes that evidence map for DO-160 Section 20 RF Susceptibility
Discrepancy register for DO-160 Section 20 RF Susceptibility
Applicability and approval basis summary
Source record request list

Who uses the output

EMC engineers use the map to brief the decision.
qualification engineers use the register to assign closure.
certification liaisons use the request list to collect source records.

How the work fits into the transaction or program

Do the Section 20 conducted and radiated susceptibility categories and test levels bound the installation's HIRF certification case. The evidence set centers on category selection against the aircraft-level HIRF environment and equipment criticality, modulation and dwell choices in the test procedures, monitoring adequacy during exposure (what counts as susceptibility), and the link from equipment-level results to the aircraft HIRF compliance argument. The likely weak points are equipment tested at levels below the internal environment the aircraft HIRF analysis assumes, susceptibility judged only by hard resets while parameter corruption goes unmonitored, and category letters transcribed into installation documents without the qualifying conditions. The output gives the EMC engineer a cleanup register for DO-160 Section 20 support for RF susceptibility levels that match the HIRF case before HIRF compliance planning for an installation.

Start with a single asset

Reduce finding cycles by checking the package first.

Regulatory limits

EE does not replace the applicant, STC holder, authorized representative, or regulator. Approval, acceptance, and airworthiness decisions remain with the people and authorities assigned to those functions.

Specific to this review

do the Section 20 conducted and radiated susceptibility categories and test levels bound the installation's HIRF certification case.
Category selection against the aircraft-level HIRF environment and equipment criticality often controls whether later summaries can be trusted.
Equipment tested at levels below the internal environment the aircraft HIRF analysis assumes is treated as a record gap until an owner closes it.
FAA and EASA evidence should stay distinguishable from commercial claims and installer notes.
The scope uses the 160 Section Susceptibility Support question as the control point, so the review stays tied to HIRF compliance planning for an installation and the buyer decision behind it.
The evidence starts with Category selection against the aircraft-level HIRF environment and equipment criticality and follows Evidence Review Levels Match references until every exception has a source location and a reason code.
The finding logic separates missing paperwork, conflicting status, stale revision data, and unsupported disposition because each class closes through a different owner.
The timing matters for EMC engineer: the output is useful only if the unresolved items are visible before acceptance, submittal, handback, or negotiation pressure fixes the sequence.
The boundary control keeps Hirf Case Environmental Qualification questions in the records or certification lane and sends technical acceptance issues to the authorized people who own them.
The handoff value comes from Evidence map for DO-160 Section 20 RF Susceptibility; it gives the next reviewer a precise map instead of another broad request for a better file.

Sources

DO-160G - Environmental Conditions and Test Procedures for Airborne Equipment

RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.

Frequently asked questions

What makes this standards review different from a general file audit?

The scope is tied to 160 section susceptibility support and to the decision named in the request. A general audit can list weak records; this pass ranks the gaps by whether they block hirf compliance planning for an installation or can be closed later without changing the decision.

What evidence has to be available before this work starts?

The starting point is category selection against the aircraft-level hirf environment and equipment criticality, the current status source, and any index or matrix that tells reviewers where the supporting artifact should live. Missing inputs are logged as findings rather than filled with assumptions.

Who decides whether an open item is acceptable?

The review explains what the evidence supports and gives emc engineer a closure path. Acceptance remains with the buyer, operator, authority, delegated engineer, or authorized person responsible for the underlying airworthiness or certification decision.

Relevant glossary terms

High-Intensity Radiated Fields (HIRF)EMI Susceptibility / Immunity Conducted Emissions Environmental Test Categories Qualification Levels

DO-160 Section 19 support for induced-signal susceptibility for interconnected equipmentPlanning do-160 section 19 induced signal? EE reviews DO-160G reports, configuration limits, and missing suppo DO-160 Section 21 emissions support for equipment suppliersDO-160 Section 21 emissions support for equipment suppliers, with source-record checks, discrepancy findings, DO-160G environmental qualification evidence support for navigation equipmentNavigation units draw hard questions on HIRF and lightning sections. We match each DO-160G category you declar Environmental category mapping for airborne equipmentThe installation environment, not a default table, sets your DO-160 categories. We derive the category set and Qualification-test-report review for avionics and equipment suppliersA DO-160 report that skips a category or drifts from the test plan stalls the submittal. We check coverage and

Where this fits

Service: TSO and STC Certification For Equipment

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.