Fuel pumps.
CFR · 2024-01-01 · US · Title 14
Compliance with § 27.955 may not be jeopardized by failure of— (a) Any one pump except pumps that are approved and installed as parts of a type certificated engine; or (b) Any component required for pump operation except, for engine driven pumps, the engine served by that pump.
official document · source cfr-2024 · id 14:§ 27.991