StacksVerified U.S. regulatory reference

14 CFR §27.991

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Compliance with § 27.955 may not be jeopardized by failure of—
  1. (a)Any one pump except pumps that are approved and installed as parts of a type certificated engine; or
  2. (b)Any component required for pump operation except, for engine driven pumps, the engine served by that pump.