C AUTION: BECAUSE OF THE LOCATION OF THE FUEL AND WATER- METHANOL FILLER CAPS, BE CAREFUL NOT TO INADVERTENTLY PUT FUEL INTO THE WATER-MATHANOL TANKS

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1 1. Servicing the Fuel Tanks A. Overwing Replenishing of Fuel Tanks C AUTION: BECAUSE OF THE LOCATION OF THE FUEL AND WATER- METHANOL FILLER CAPS, BE CAREFUL NOT TO INADVERTENTLY PUT FUEL INTO THE WATER-MATHANOL TANKS. THE ENGINE WILL BE OVERTORQUED IF FUEL IS USED INSTEAD OF WATER-METHANOL. (1) Check quantity in tanks using cockpit gauges. CAUTION: IF TANKS NEED REFILLING, CARE SHOULD BE TAKEN NOT TO DRAG THE HOSE ACROSS THE WING DE-ICER BOOTS AS DAMAGE TO THE BOOTS COULD RESULT. IT IS RECOMMENDED THAT THE HOSE BE BROUGHT OVER THE TRAILING EDGE OF THE WING RATHER THAN THE LEADING EDGE. (2)Ground fuel hose nozzle to aircraft structure through grounding jacks located outboard of the filler caps. (3)Add sufficient fuel to fill tanks without overflowing. (4)Check and make sure filler caps are securely fastened. WARNING: OVERFLOWING TANKS CREATE A SERIOUS FIRE HAZARD AND MUST BE AVOIDED. DAMAGE TO THE DE-ICER BOOTS COULD ALSO RESULT. SPILLED FUEL MUST BE WIPED UP IMMEDIATELY.

2 2. Servicing Fuel System Under Icing Conditions NOTE: Jet fuels have a stronger affinity for water than Avgas. The settling time for water in jet fuel is five times as long as for water in Avgas. The following recommended ground procedures can reduce the suspended or free water to 30 parts/million, Suspended water in a quantity of 40 parts/million is sufficient to ice a filter. A. Corrective or Preventive Action - Ground Handling. The acceptable water content for jet fuel is 30 parts/million. Because fuel with this water content is not available at all airports, the use of a "GO-NO-GO" kit and the following procedures are recommended: (1)Water drain main tanks only after each flight and prior to refueling. This clears tanks of any water condensed in flight. (2)Allow maximum possible time between refueling and takeoff. Water drain prior to takeoff. (3)Whenever possible, fuel at or below ambient temperature should be used. (4)Use a "GO NO-GO" kit each time aircraft is refueled. (5)Drain engine fuel filter daily, and check. for water content with a "GO-NO-GO" kit. NOTE: Set tank boost pump switch to "ON" during draining, to prevent air from entering the fuel system. 3. Defueling - Pumping through the Drain Valves in Main Landing Gear Wheel Well. WARNING: WHEN DEFUELING. HAVE FIRE FIGHTING EQUIPMENT AVAILABLE TO COMBAT PETROLEUM FIRES. DO NOT PERMIT SMOKING OR USE OF ANY ELECTRICAL EQUIPMENT WHICH DOES NOT EMPLOY EXPLOSION PROOF FEATURES. ELECTRICALLY GROUD EQUIPMENT AND AIRCRAFT. ENSURE THAT THERE ARE NO DISCONNECTED ELECTRICAL LEADS WITHIN THE TANKS. CAUTION: PRIOR TO DEFUELING THE FUEL TANK VENT SHOULD BE CHECKED TO ENSURE THAT IT IS OPEN AND THAT NO OBSTRUCTIONS EXIST IN THE OVERBOARD VENT LINE. A CLOSED OR OBSTRUCTED VENT COULD RESULT IN COLLAPSING THE WING. WHEN DEFUELING AIRCRAFT 164 THROUGH 200, EXCLUDING 322 AND 323, AND AIRCRAFT 1 THROUGH 163, INCLUDING 322 AND 323 HAVING ASC 178 INCORPORATED. THE DRAIN VALVES ARE RE-LOCATED DOWNSTREAM OF THE FLOWMETER TRANSMITTER. WHEN DEFUELING, THE FUEL FLOW MAY EXCEED THE FLOW LIMITATIONS OF THE FLOWMETER INDICATOR RESULTING IN DAMAGE TO THE INSTRUMENT. IN ORDER TO PREVENT THIS, THE AC INSTRUMENT BUS MUST BE DEACTIVATED BY ENSURING THAT THE A,B, AND E. INVERTERS ARE IN THE OFF POSITION.

3 NOTE: This procedure is written for the right side only. It must be repeated on the left side to completely defuel the aircraft fuel tanks. It is recommended that a slow acting shutoff valve be installed at the drain valve outlet during defueling operations. The slow acting shutoff is closed first when draining under pressure in order to prevent shocking of the altitude capsule in the Flow Control Unit. A. Attach one end of drain hose to the right hand drain valve located in the main landing gear wheel well. B. Check HP fuel cock and crossfeed closed. C. Check FIRE PULL T-handle is in open position. D. Supply 28V do power to aircraft. E. Select R. Norm or R. Aux fuel boost pump to the ON position. F. Open drain valve and open slow acting valve. G. When defueling is completed position fuel boost pump to OFF position. H. Close slow acting valve and drain valve. I. Remove drain hose. J. Remove slow acting valve. Fuel remaining in the tanks at this point may be removed through the two tanks drains located on the lower inboard wing planks. Defueling -Suction through the Drain Valves in Main Landing Gear Wheel Well. WARNING: WHEN DEFUELING, HAVE FIRE FIGHTING EQUIPMENT AVAILABLE TO COMBAT PETROLEUM FIRES, DO NOT PERMIT SMOKING, OR USE OF ANY ELECTRICAL EQUIPMENT WHICH DOES NOT EMPLOY EXPLOSION PROOF FEATURES. ELECTRICALLY GROUND ALL EQUIPMENT AND AIRCRAFT. ENSURE THAT THERE ARE NO DISCONNECTED ELECTRICAL LEADS WITHIN THE TANKS. CAUTION: PRIOR TO DEFUELING, THE FUEL TANK VENT SHOULD BE CHECKED TO ENSURE THAT IT IS OPEN AND THAT NO OBSTRUCTIONS EXIST IN THE OVERBOARD VENT LINE. A CLOSED OR OBSTRUCTED VENT COULD RESULT IN COLLAPSING THE WING. WHEN DEFUELING, AIRCRAFT 164 THROUGH 200, EXCLUDING 322 AND 323, AND AIRCRAFT 1 THROUGH 163, INCLUDING 322 AND 323 HAVING ASC 178 INCORPORATED. THE DRAIN VALVES, ARE RE-LOCATED DOWNSTREAM OF THE FLOWMETER TRANSMITTER. WHEN DEFUELING OR DRAINING FUEL, THE FUEL FLOW MAY EXCEED THE FLOW LIMITATIONS OF THE FLOWMETER INDICATOR RESULTING IN DAMAGE TO THE INSTRUMENT. IN ORDER TO PREVENT THIS, THE AC INSTRUMENT BUS MUST BE DEACTIVATED BY ENSURING THAT THE A, B AND E INVERTERS ARE IN THE OFF FOSITION. NOTE: This procedure is written for the right side only. It must be repeated on the left side to completely defuel the aircraft fuel tanks. It is recommended that a slow acting shutoff valve be

4 installed at the drain valve outlet during defueling operations. The slow acting shutoff is closed first when draining under pressure in order to prevent shocking of the altitude capsule in the Flow Control Unit. A. Attach one end of drain hose to the right hand drain valve located in the main landing gear wheel well. B. Check HP fuel cock and crossfeed closed. C. Check FIRE PULL T-handle is in open position. D. Supply 28V do power to aircraft. E. Select R. Norm or R. Aux fuel boost pump to the ON position. F. Open drain valve and open slow acting valve. G. Under truck suction, commence defueling. H. Select fuel boost pump to the OFF position. I. When defueling is completed close slow acting valve and drain valve. J. Remove drain hose. K. Remove slow acting valve. L. Fuel remaining in the tanks at this point may be removed through the two tanks drains located on the lower inboard wing planks.

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