ARP4754B surveillance
ARP4754B development assurance evidence review for surveillance equipment
This is an ARP4754B evidence review aimed at surveillance equipment such as transponders and ADS-B systems. A supplier's certification team uses it to find the development-assurance gaps before the authority raises them. The review checks that transponder and ADS-B function requirements, antenna installation substantiation, and the trace between them and the aircraft-level surveillance objectives are all present and coherent. You leave with a standards map, a gap list, and an ordered path to close each open objective.
When this review is needed
- A transponder or ADS-B package is approaching submittal and the supplier wants its ARP4754B gaps surfaced early.
- Antenna installation substantiation is claimed but its link to the surveillance performance requirements has not been checked.
- A reviewer has asked how the ADS-B transmit function traces to an aircraft-level surveillance requirement.
- A finding response is due and the team needs to know which objectives the installation evidence actually covers.
The problem
Surveillance equipment couples a function to its antenna installation so tightly that the requirement flow has to survive the boundary between the box and the aircraft, and that is exactly where it tends to break. A supplier can show radio-frequency performance and DO-160G qualification while leaving the installation substantiation disconnected from the surveillance requirements it is meant to satisfy. The result is a package that looks complete part by part but cannot be traced as a system.
What gets reviewed
- Transponder and ADS-B function requirements and their capture at the equipment level
- Antenna installation substantiation tied to the surveillance performance requirements
- The trace from aircraft-level surveillance objectives to the equipment behavior
- DO-160G qualification for the installed environment the requirements assume
- DO-178C lifecycle data referenced where surveillance software supports the function
- Configuration control so the reviewed installation matches the submitted one
What gets validated
- Antenna installation substantiation connects explicitly to the surveillance performance requirements it supports
- The ADS-B and transponder functions trace to aircraft-level surveillance requirements without a gap
- DO-160G qualification categories reflect the installed radio-frequency and environmental conditions
- The software level referenced for the surveillance function matches its assurance need
- The installation as substantiated matches the configuration presented for submittal
Evidence normally required
- The surveillance equipment certification plan with its ARP4754B objectives
- Transponder and ADS-B function requirement sets
- Antenna installation and integration substantiation
- DO-160G qualification reports for the equipment
- DO-178C lifecycle data references for surveillance software
Common discrepancies
- Antenna substantiation that stands alone with no link to a surveillance requirement
- An ADS-B transmit behavior verified locally but not traced to the aircraft-level objective
- Installation environment assumptions that DO-160G qualification does not actually cover
- A configuration difference between the substantiated installation and the submitted one
What is at stake
When installation substantiation floats free of the requirement set, reviewers treat the surveillance function as unverified at the aircraft level and open findings the supplier did not plan for. Each one drags the antenna and integration evidence back into review, and the closure that was scheduled for a week stretches across the certification calendar.
Move from findings to resolution
Identify gaps against the means of compliance.
How the work runs
Reconnect installation to function
Match every piece of antenna and integration substantiation to the surveillance requirement it is meant to support.
Trace to the aircraft level
Follow the transponder and ADS-B functions up to the aircraft-level surveillance objectives and mark the breaks.
Check the qualified environment
Confirm DO-160G categories cover the installation conditions the requirements assume.
Order the closures
Sequence so installation reconnection precedes the trace work that rests on it.
What the buyer receives
- A standards map connecting each ARP4754B objective to the surveillance evidence behind it
- A gap list that names the disconnected installation and trace items
- A closure order that reconnects installation substantiation before the trace above it
Who uses the output
- Certification engineers preparing the surveillance submittal
- Engineering leads reconciling antenna substantiation with the requirement set
- Compliance managers tracking objective closure before a finding response
How the work fits into the transaction or program
The review runs before submittal or after an initial finding, giving the surveillance team a clear read on where installation evidence and requirement flow have come apart. Its closure order lets the certification plan target the real disconnects instead of assuming the parts add up to a whole.
Start with a single asset
Confirm requirements trace through verification.
Jurisdiction-specific considerations
FAA and EASA reference their own surveillance performance mandates, and an ADS-B configuration accepted under one can carry different installation expectations under the other. The review notes where the substantiation may need extension so the same package serves both authorities.
Regulatory limits
The review maps evidence to ARP4754B objectives and flags gaps. It does not perform installation substantiation, agree a compliance finding, or make an airworthiness determination on the surveillance system.
What this review does not cover
Specific to this review
- Surveillance equipment breaks ARP4754B trace at the antenna boundary, where installation substantiation is developed as a separate deliverable and never stitched back to the function requirements.
- An ADS-B configuration qualified in isolation can still fail at the aircraft level if the installation environment differs from what DO-160G testing assumed.
- The reviewed installation and the submitted installation diverge more often on surveillance packages than on self-contained equipment, because the antenna and routing change late.
Sources
SAE International. Development assurance process at aircraft and system level, including requirements capture and validation.
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.
Frequently asked questions
Our antenna substantiation is thorough. Why is it still a finding?
Thorough substantiation proves the installation performs. ARP4754B asks that it be shown to satisfy a specific surveillance requirement. If the substantiation is not linked to that requirement, the function reads as unverified at the aircraft level regardless of how complete the antenna work is.
Relevant glossary terms
Related pages
Where this fits
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