TM 1-1520-238-T-7 Change 5 10–91 10–17. FUEL CROSSFEED/BOOST SYSTEM – MAINTENANCE OPERATIONAL CHECK 10–17 Tools: Nomenclature Part Number Tool Kit, Aircraft SC518099CLA01 Mechanic’s Pail, Utility (2) A-A-1273 Personnel Required: 67R Attack Helicopter Repairer (3) Two people to assist References: FM 10-68 TM 1-1520-238-T-4 TM 1-1520-238-T-6 TM 9-1090-208-23-1 TM 1-1520-238-23 TM 1-1520-238-CL Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – L200 and R200 access panels removed Paragraph 10–12 HELICOPTER FUEL SYSTEM – VISUAL CHECK completed Paragraph 10–10 FUEL SYSTEM – POWER UP completed TM 1-1520-238-T-4 Maintenance headset connected TM 1-1520-238-T-6 Pilot and CPG caution/warning maintenance operational check performed WARNING Make sure helicopter safing procedures are accomplished. Observe all safety precautions during troubleshooting or maintenance tasks. Failure to do so could result in death or serious injury. If injury occurs, seek medical aid. Jet engine fuel is explosive, flammable, and toxic to skin, eyes, and respiratory tract. Work in a well-ventilated area away from open flames. Wear protective clothing. If fuel comes in contact with eyes or skin, flush with water and get medical aid. Do not allow sparks or flame near helicopter when servicing or performing maintenance on fuel system. Make sure helicopter and drains are properly grounded (FM 10-68). NOTE Refer to pilot station (fig. 10–42) and CPG station (fig. 10–43) for cockpit configuration and equipment. If referenced out of one paragraph or volume and into another for additional troubleshooting, upon completion of the task, return to the maintenance operational check for the original paragraph or volume. Amber XFEED indicators on pilot and CPG caution/warning panels (fig.10–51) will light with pilot FUEL panel (fig. 10–46) ENG 1 and ENG 2 switches set to OFF (engine 1 and engine 2 crossfeed/shutoff valves closed).