Sensor qualification
DO-160G environmental qualification evidence support for sensor systems
This support reviews a sensor system's DO-160G environmental qualification evidence and confirms the declared categories cover the often exposed location a sensor has to measure from. It suits air data probes, pressure and temperature sensors, and inertial units whose accuracy has to survive the environment it sits in. A specialist reconciles the qualification form to the mounting and weighs the sections a sensor is exposed to: vibration and shock, fluids susceptibility, icing, and pressure or altitude. 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 sensor unit is entering authorization and its environmental qualification needs a read against the mounting.
- The sensor is moving to a more exposed location whose vibration or fluid environment differs from the original.
- A finding asks whether the vibration or fluids categories cover the sensor's installed environment.
- A probe change or relocation alters the pressure, icing, or contamination exposure the categories assume.
The problem
A sensor is often mounted where the measurement has to happen, not where the environment is kind, so its DO-160G exposure runs to the harsher sections: severe vibration and operational shock, fluids susceptibility from de-icing and hydraulic fluids, icing, and pressure or altitude for a probe in the airstream. A sensor qualified for an interior bay can be badly understated for an exposed external mount, and the accuracy the unit is sold on has to hold across that harsher environment. The form can read complete while the categories were set for a sheltered location.
What gets reviewed
- The environmental qualification form reconciled to the sensor's mounting and exposure
- Vibration and operational shock categories for the installed location
- Fluids susceptibility for de-icing, hydraulic, and other fluids the sensor may contact
- Icing and pressure or altitude categories for an exposed or airstream mount
- Temperature and humidity categories for the sensor's environment
- The link between the qualification evidence and the installation the approval covers
What gets validated
- Vibration and shock categories match the sensor's exposed mounting, not an interior assumption
- Fluids susceptibility covers the de-icing and hydraulic fluids present at the location
- Icing and pressure categories carry test reports appropriate to an airstream mount
- Temperature and humidity categories cover the sensor's installed environment
- The installation assumptions agree with the certification basis for the approval
Evidence normally required
- The DO-160G environmental qualification form for the sensor unit
- Test reports supporting the vibration, fluids, icing, and physical categories
- The mounting and exposure assumptions for the installed location
- The fluids and contaminants present in the sensor's environment
- The certification basis and any prior findings on the qualification
Common discrepancies
- A vibration category set for an interior bay that understates an exposed external mount
- A fluids susceptibility category that omits a de-icing fluid the sensor actually contacts
- An icing or pressure category missing for a probe in the airstream
- A temperature category that does not cover the exposed location's extremes
What is at stake
An understated vibration or fluids category can let a sensor drift, degrade, or fail in service, and because the sensor feeds downstream systems through the ARP4754B allocation, a degraded output propagates upward. An unsupported category draws a finding that can force retest of the exposed environment, slow to arrange late. Reconciling the exposed-environment sections to the actual mounting before submittal keeps a field-degradation problem from being discovered after installation.
Move from findings to resolution
Identify gaps against the means of compliance.
How the work runs
Map the exposure
Establish the sensor's mounting, airstream exposure, and the fluids and contaminants present at the location.
Read the harsh sections
Take the vibration, shock, fluids, icing, and pressure categories and note each declared level.
Match and reconcile
Confirm each category has a test report and reflects the exposed environment rather than an interior assumption.
Order the gaps
Rank unsupported and understated categories by closure effort so any environmental 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 exposed-environment sections called out
- A closure sequence from each unsupported category to the evidence that resolves it
Who uses the output
- Certification leads confirming the sensor qualification is ready to submit
- Test engineers scheduling any vibration, fluids, or icing retest the gaps require
- Compliance managers tracking exposed-environment 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, sitting where the DO-160G environment meets the ARP4754B allocation above the sensor. It reconciles the harsher sections to the actual mounting, so an understated vibration or fluids category surfaces before the sensor degrades in service, and its output feeds the sensor installation approval.
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 expect the exposed-environment categories to reflect the actual mounting. The mapping notes where the declared categories hold for one authority's basis but would need restating for the other given the installed location.
Regulatory limits
This work maps the qualification evidence to the DO-160G sections and reconciles it to the sensor's mounting. It does not approve the sensor, 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 vibration, fluids, or icing tests
- Authoring the qualification form or the test plans
- Issuing an approval or compliance finding for the authority
Specific to this review
- A sensor is mounted where the measurement has to happen, so its DO-160G exposure runs to the harsher sections that an interior-qualified unit rarely covers.
- Fluids susceptibility is a frequent miss: a category can omit a de-icing or hydraulic fluid the sensor actually contacts at its exposed mount.
- Because the sensor feeds downstream systems through the ARP4754B allocation, an understated environmental category does not stay local; a degraded output propagates upward.
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
The sensor was qualified for an interior bay but we are mounting it externally. What changes?
The exposed-environment categories change substantially. Vibration, fluids, icing, and pressure all get harsher on an external mount, so those sections are rechecked against the real location before the interior-qualified evidence can be relied on.
Relevant glossary terms
Related pages
Where this fits
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