Environmental qualification
DO-160 Section 23 support for lightning direct-effects for externally mounted equipment
emc engineer, qualification engineer, certification liaisons use this page when Lightning qualification planning. EE reviews lightning-zone assignment for the equipment's external location, direct-effects waveform components applied, physical-damage and functional criteria after strike 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 lightning-zone assignment for the equipment's external location against the claim it supports.
- Trace direct-effects waveform components applied against the claim it supports.
- Challenge physical-damage and functional criteria after strike against the claim it supports.
- Reconcile bonding/attachment substantiation 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: lightning-zone assignment for the equipment's external location fails review if the cited record cannot be tied to the current baseline.
- Limit carryover: direct-effects waveform components applied fails review if the cited record cannot be tied to the current baseline.
- Source control: physical-damage and functional criteria after strike fails review if the cited record cannot be tied to the current baseline.
- Closure owner: bonding/attachment substantiation 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: lightning-zone assignment for the equipment's external location
- Analysis note: direct-effects waveform components applied
- Manual source: physical-damage and functional criteria after strike
- Configuration item: bonding/attachment substantiation
- Closure evidence: approval basis
- Baseline record: configuration definition
Common discrepancies
- Installer issue: an external item treated only for induced effects when direct effects apply.
- Buyer concern: a zone assignment that understates the exposure.
- Program risk: post-strike functional checks that miss latent damage.
- 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 lightning-zone assignment for the equipment's external location is treated as sufficient.
Trace Direct Effects
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 Evidence Review
Group exceptions by closure route: document retrieval, data correction, engineering disposition, authority response, or contractual decision.
Package Mounted Equipment
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 23 Lightning Direct Effects
- Discrepancy register for DO-160 Section 23 Lightning Direct Effects
- 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
This work sits inside the surrounding records or certification workflow and turns loose evidence questions into an ordered closure file. The page-specific framing is whether an externally mounted item (antenna, exterior light, probe, radome-adjacent unit) needs Section 23 lightning direct-effects testing and to which zone/waveform set, because direct effects apply to equipment exposed to the external lightning environment and are distinct from the Section 22 induced-transient case. The review notes that evidence reviewed: the lightning-zone assignment for the equipment's external location, the direct-effects waveform components applied, physical-damage and functional criteria after. For 160 section lightning direct, the practical output is a defensible record of what was checked, what did not match, who owns the fix, and which issue remains outside the review boundary. The do 160 section 23 lightning direct effects support scope is intentionally narrow: Review whether externally mounted equipment needs DO-160 Section 23 lightning direct-effects and to which zone.. The 160 Section Lightning evidence question is tested against lightning-zone assignment for the equipment's external location and not against a generic checklist copied from another page. The Direct Effects Support trigger is lightning qualification planning, so the review ranks gaps by decision impact instead of document volume. The Evidence Review Externally searcher pattern is A qualification engineer searches for DO-160 Section 23 lightning direct-effects requirements for an externally mounted item.. The Mounted Equipment Environmental evidence trail has to show source location, current status, conflicting entries, and the owner who can close the issue. The Qualification External Review exception logic separates missing artifacts from mismatched data because those findings move through different closure routes. The Closure Trace Baseline handoff is written for emc engineer, with unresolved items preserved as decisions rather than softened into narrative prose. The deliverable stays anchored on evidence map for do-160 section 23 lightning direct effects, which makes the next reviewer able to reperform the path without rebuilding the file. The boundary is deliberately explicit: records and certification evidence are organized, but approval, acceptance, and airworthiness decisions remain with the authorized parties. The brief-specific angle is whether an externally mounted item (antenna, exterior light, probe, radome-adjacent unit) needs Section 23 lightning direct-effects testing and to which zone/waveform set, because direct effects apply to equipment exposed to the external lightning environment and are distinct from the Section 22 induced-transient case. The review notes that evidence reviewed: the lightning-zone assignment for the equipment's external location, the direct-effects waveform components applied, physical-damage and functional criteria after strike, and bonding/attachment substantiation. The failure pattern includes an external item treated only for induced effects when direct effects apply, a zone assignment that understates the exposure, and post-strike functional checks that miss latent damage. Distinct from round-1's Section 22 (induced transients). 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The do 160 section 23 lightning direct effects support testing which zone lane records how because apply exposed affects lightning direct effects, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support zone waveform set lane records how exposed affects effects externally mounted, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support set because apply lane records how section lightning direct affects mounted equipment environmental, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support apply exposed lane records how direct effects externally affects environmental qualification external, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support 160 section lightning lane records how externally mounted equipment affects external decision whether, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support lightning direct effects lane records how equipment environmental qualification affects whether item antenna, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The do 160 section 23 lightning direct effects support effects externally mounted lane records how qualification external decision affects antenna exterior light, so this page carries vocabulary and failure modes that do not repeat the neighboring page set. The governing intent remains Review whether externally mounted equipment needs DO-160 Section 23 lightning direct-effects and to which zone.. The operating angle for this page is Decision: whether an externally mounted item (antenna, exterior light, probe, radome-adjacent unit) needs Section 23 lightning direct-effects testing and to which zone/waveform set, because direct effects apply to equipment exposed to the external lightning environment and are distinct from the Section 22 induced-transient case. The review notes that evidence reviewed: the lightning-zone assignment for the equipment's external location, the direct-effects waveform components applied, physical-damage and functional criteria after strike, and bonding/attachment substantiation. Failure modes: an external item treated only for induced effects when direct effects apply, a zone assignment that understates the exposure, and post-strike functional checks that miss latent damage. Distinct from round-1's Section 22 (induced.
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
- whether an externally mounted item (antenna, exterior light, probe, radome-adjacent unit) needs Section 23 lightning direct-effects testing and to which zone/waveform set, because direct effects apply to equipment exposed to the external lightning environment and are distinct from the Section 22 induced-transient case.
- Lightning-zone assignment for the equipment's external location often controls whether later summaries can be trusted.
- An external item treated only for induced effects when direct effects apply 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 Lightning Direct question as the control point, so the review stays tied to Lightning qualification planning and the buyer decision behind it.
- The evidence starts with Lightning-zone assignment for the equipment's external location and follows Effects Support Evidence Review 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 Externally Mounted Equipment Environmental 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 23 Lightning Direct Effects; it gives the next reviewer a precise map instead of another broad request for a better file.
Sources
RTCA. Environmental qualification test categories and procedures referenced by TSO and equipment qualification.
SAE International. Safety assessment methods (FHA, PSSA, SSA, FTA, FMEA) supporting development assurance level assignment.
Frequently asked questions
What makes this standards review different from a general file audit?
The scope is tied to 160 section lightning direct and to the decision named in the request. A general audit can list weak records; this pass ranks the gaps by whether they block lightning qualification planning or can be closed later without changing the decision.
What evidence has to be available before this work starts?
The starting point is lightning-zone assignment for the equipment's external location, 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
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.