The requirements presented in this document address the key considerations for mechanical and electrical safety in aircraft fuel pump design. Document sections focus on understanding safety relative to an electrically motor driven fuel pump assembly acting as an ignition source for explosive fuel vapors within the airplane tank. Purpose This Aerospace Recommended Practice (ARP) provides fuel booster pump design considerations commensurate with industry requirements for prevention of ignition of explosive fuel vapors and the confinement of spark-initiated explosions by means of mechanical and electrical design features. Guidelines are presented for proper design of fuel pumps and systems to meet the intent of 14CFR 25.901(c)@ Amendment 25-40 or later@ and 14CFR 25.981@ Amendment 25-102 or later and FAA AC 25.981-1C for in-tank ignition sources and the general safety requirements of MIL-STD-882. In addition@ recommendations are presented for proper assembly@ testing@ and repair/overhaul to verify safe fuel pump design that prevents mechanical and electrical arcs and sparks.