TM 55-1560-307-13&Pf.Fuel low level light indicators (3). Check to testoperation; press and test the four lights. Low level lightwill illuminate when fuel quantity in each tank isapproximately one minute from being empty, Figure 2-23.g.The override switch (4) overrides the fuelpressure switches, Figure 2-23.h.System circuit breakers (5) will trip if indicatorlights, pumps, or override switch malfunctions. Allcircuit breakers must be pushed in prior to systemoperation, Figure 2-23.i.Turn pump switch (2) ON and hold until pumpengages, Figure 2-23.2-12.OPERATION. The ERFS system is an auxiliaryfuel system designed to supplement the aircraftstandard fuel system. Refer to Figure 2-24 and thefollowing procedure for operating procedures.NOTE· In order to maintain aircraft CG,suggested tank burn sequence is 4, 1, 3,2.· After aircraft ground checks but prior toflight, ensure positive fuel flow fromERFS to aircraft fuel system.a.Initiate fuel transfer when the aircraft's main fueltanks have decreased 1000 pounds or sooner. TheERFS is designed as an automatic system. Once fueltransfer is initiated, the pumps can be turned on andsimply monitored. One fuel pump per side is enough tomeet the demands of the aircraft. Two pumps per sideare installed for redundancy and for faster fuel transfer ifdesired.b.Ensure tank cam lever for selected tank is open.c. Turn all pump switches (3) (four each) ON,Figures 2-22, 2-23, and 2-24.NOTEDo not use liquid level indicator forcontinuous fuel quantity readings duringflight. Use only as necessary. Lock inplace after use.d.Transfer fuel until low level warning lights (5)come on, Figure 2-22.NOTEPreferred method of operation is to turnall pumps ON during fuel transfer. Allowat least 10 second delay between eachpump switch actuation.2-13.TURN-OFF PROCEDURES. Turn-off systemoperation as follows:a.Turn all pump switches (3) (four each) OFF,Figure 2-22.b. Close cam lever (8), Figure 2-21.2-29
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
