14 CFR §23.2510
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For any airplane system or equipment whose failure or abnormal operation has not been specifically addressed by another requirement in this part, the applicant must design and install each system and equipment, such that there is a logical and acceptable inverse relationship between the average probability and the severity of failure conditions to the extent that: