Softness, blistering or edge opening prompts inspection; none alone shows the extent of separation.
Visible clues
Note softness, sound change and surface blistering separately.
Photograph cracks, edge gaps and damage around fasteners.
Mark each finding on a simple panel sketch.
Choose a nearby intact area as a comparison point.
Record possible causes
| Alongside the finding | Event to check |
|---|---|
| Impact mark | Date and point of contact |
| Open edge | Water exposure or seal condition |
| Broad change | Age, use and prior repair |
Do not assign a cause without supporting evidence.
Verify panel material and construction from its label or technical file.
Clean the panel; photograph intact and suspect areas from the same light, angle and distance.
Use a ruler or template to record the boundary of a blister or gap.
Light touch and tapping are screening observations only; they do not measure bond strength.
If using thermal imaging or surface temperatures, log instrument, conditions and locations; do not treat them alone as proof of delamination.
For comparison, measure with the same device settings under similar conditions.
Inspect possible water entry and nearby joints; leave opening or drilling to an authorized technical person.
If damage spreads, the core is exposed or transport safety may be affected, isolate the equipment and request authorized inspection.
A second inspector can repeat the checks at the same locations to compare observations.
Base repair decisions on damage extent, panel construction and maker/service instructions.
Attach findings to the service record before repair or part replacement.
At the next inspection, remeasure and photograph the same sketch locations; compare changes with the record.
Include equipment ID, date, inspector, finding, decision and corrective action in the log.
