CS 29.991 Fuel pumps

• ED Decision 2003/16/RM found in: CS-29 Amdt 11 - Large Rotercraft (Feb 2023)

CS 29.991 Fuel pumps ED Decision 2003/16/RM (a) Compliance with [CS 29.955](#_DxCrossRefBm1178332010) must not be jeopardised by failure of: (1) Any one pump except pumps that are approved and installed as parts of a type certificated engine; or (2) Any component required for pump operation except the engine served by that pump. (b) The following fuel pump installation requirements apply: (1) When necessary to maintain the proper fuel pressure: (i) A connection must be provided to transmit the carburettor air intake static pressure to the proper fuel pump relief valve connection; and (ii) The gauge balance lines must be independently connected to the carburettor inlet pressure to avoid incorrect fuel pressure readings. (2) The installation of fuel pumps having seals or diaphragms that may leak must have means for draining leaking fuel. (3) Each drain line must discharge where it will not create a fire hazard. CS 29.991 Fuel pumps ED Decision 2003/16/RM (a) Compliance with [CS 29.955](#_DxCrossRefBm1513259605) must not be jeopardised by failure of: (1) Any one pump except pumps that are approved and installed as parts of a type certificated engine; or (2) Any component required for pump operation except the engine served by that pump. (b) The following fuel pump installation requirements apply: (1) When necessary to maintain the proper fuel pressure: (i) A connection must be provided to transmit the carburettor air intake static pressure to the proper fuel pump relief valve connection; and (ii) The gauge balance lines must be independently connected to the carburettor inlet pressure to avoid incorrect fuel pressure readings. (2) The installation of fuel pumps having seals or diaphragms that may leak must have means for draining leaking fuel. (3) Each drain line must discharge where it will not create a fire hazard. #### CS 29.991 Fuel pumps *ED Decision 2003/16/RM* (a) Compliance with [CS 29.955](#_DxCrossRefBm1685772475) must not be jeopardised by failure of: (1) Any one pump except pumps that are approved and installed as parts of a type certificated engine; or (2) Any component required for pump operation except the engine served by that pump. (b) The following fuel pump installation requirements apply: (1) When necessary to maintain the proper fuel pressure: (i) A connection must be provided to transmit the carburettor air intake static pressure to the proper fuel pump relief valve connection; and (ii) The gauge balance lines must be independently connected to the carburettor inlet pressure to avoid incorrect fuel pressure readings. (2) The installation of fuel pumps having seals or diaphragms that may leak must have means for draining leaking fuel. (3) Each drain line must discharge where it will not create a fire hazard.