StacksVerified U.S. regulatory reference

14 CFR §125.179

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each airplane fuel system must be arranged so that the failure of any one component does not result in the irrecoverable loss of power of more than one engine.
  2. (b)A separate fuel tank need not be provided for each engine if the certificate holder shows that the fuel system incorporates features that provide equivalent safety.