SureFire 101 - Measure squib current readback
Why did the airbag you just fired reach full inflation later than you expected it to? Was it a defective airbag, or perhaps the cover, instrument panel, or seat impeded it's progress. Your first check should be to determine if both the primary and secondary stage of the airbag fired. This can be checked through x-ray analysis, or by simply looking at the squib current readback data that your automated airbag test system acquired. If you see that current flowed through the squib and the squib broke down, you can be reasonably certain that the airbag fired as expected. If there was no squib current on either stage, then the problem is likely with the airbag module and not with the airbag cover, IP or seat.