Many thanks.
I will use the fault trees to support my qualitative argument that equipment DALs are appropriate to the function. I see that it would be inappropriate to use DALs to support calculation of the overall reliability of the function.
I am creating a Fault Tree Analysis for a Part 29 rotorcraft glass cockpit modification. The purpose is to verify compliance to 29.1309 – the design is frozen so unfortunately there is no scope to use the FTA for reliability/DAL allocation.
I know ARP 4754/4761, have a basic knowledge of FTA...
I'd be interested in how your companies approach requirements change management. That is, proper control of iterative changes during development, eg, in response to test failures. I'm interested in:
• Option appraisal
• Governance of decision (particularly between different teams)
• Control of...
Thanks for the suggestions.
I will take survivable crash load factors from the FAR.
The difficult bit is to argue a probability of failure based on (maybe) crash load distribution and material allowables. Clearly the published ultimate crash load factors already contain a safety factor (1.5?)...
Hi All,
This concerns relative motion between an aircraft system and the local structure, during a crash, which could cause a hazard.
This requires an explicit demonstration by a combination of test, analysis and experience that the probability of the hazard occurring is < 1E-9. I will...
