StacksVerified U.S. regulatory reference

14 CFR §25.1709

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Each EWIS must be designed and installed so that:
  1. (a)Each catastrophic failure condition—
    1. (1)Is extremely improbable; and
    2. (2)Does not result from a single failure.
  2. (b)Each hazardous failure condition is extremely remote.