A320 CH28

1.       OUTER TANK HAS NO PUMP ,FUEL GOES TO INNER VIA INTERCELL VALVE

2.       FOB (FUEL ONBOARD) IND ON FUEL PAGE DUPLICATED IN EWD

3.       EACH REF/DEF VALVE HAS A MAN PLUNGER  TO OPERATE IN ELEC FAIL

4.       FLSCU (FUEL LEVEL SENSING CONT UNIT ) SEND FUEL LEVEL TO FQIC

B747 CHAPTER 28

28

	2500	1500	13500	35000	45000
SURGE	RES2	RES1	MAIN1	MAIN2	CENTRE	MAIN3	MAIN4	RES4	RES3	SURGE

1.           TOTAL FUEL FOR 747-SP IS 150000KG

2.           RES3,4 IS ONLY IN 747-SP

3.           2 O/R JETISON PUMP IN CENTER

4.           2  J/P IN MAIN 2,3 EACH

5.           FUEL CAN TRANSFER FROM RES TO MAIN VIA TRANSFER VLV BY GRVITY

6.           FUELING CAN DONE WITHOUT POWER, ALL VLV HAVE MANUAL OVERRIDE

7.           TEMP SENSOR IS IN MAIN1

8.           SURGE TANKS HAVE JETISON NOZZLE VLV TO SEND FUEL TO OUTBOARD

9.           FOR GND TRANSFER DESTINATION DEFUEL VLV MUST OPEN AND:

BOOST PUMP ON+ MANUAL DEF/REF VLV ON OR

JETISON PUMPS: DO NOT NEED R/D VLV OR

FROM CENTER TO MAIN: O/R J/P ON+ JET VLV ON

10.        MANUAL D/R VLV CONNECTS FEED LINE TO JET LINE

11.        BOOST PUMPS PRODUCE 25 PSI , J/P ARE 55 PSI

12.        MAN R/D VLV HAS SW ON REMOTE PNL FOR TRANSFER FUEL

13.        TRANSFER FROM CNTR TO INNERS TO OUTERS NEED MAN R/D VLV OPEN

14.        O/R J/P IS IN HIGHER LEVEL THAN BOOST PUMPS SO CNTR NEED A SCAVENGE PUMP TO PREVENT REMAIN EXTRA FUEL IN  CNTR

15.        THERE ARE 12 R/D VLV:

2 FOR EACH CENTR, MAIN2, MAIN3

1 FOR EACH RES, MAIN1, MAIN 4

16.                 EAH ENG FED BY OWN MAIN TANK (ENG1 BY TANK1…)
17.                 4 XFEED VLV PERMIT EACH TANK TO FEED OTHER ENG
18.                OUTER TANKS MUST TRANSFER TO INNERS FOR JETISON
19.                 4 VOLUMETRIC COMPENSATOR:

IN MAIN1, 4

IN MAIN2 FOR MAIN 2, 3

IN RES1 FOR ALL RES

20.                 TANKS VENTED BY DUCTS AND RAM AIR SCOOP AND FLAME ARRESTOR
21.                 SCOOPS PRESS THE TANKS TO MINIMIZE FUEL LOSS
22.                ALL R/D VLV WILL CLOSE WHEN SURGE TANK RECEIVE 40 GALLON BY AN OVERFILL FLOAT SW
23.                MAIN TANKS HAVE FILLING PORT OVER WING
24.                R/D CLOSE IF POWER SHUT
25.                OVER FILL RESET SW ALLOWS FUELING IF SURGES DRAINED
26.                EACH TANK HAS A GAGING COMPENSATOR
27.                GAGE TEST IS DISABLED DURING FUELING
28.                VOL S/O UNIT IN MEC  R/D VLV
29.                VSOU CARDS:

S/O CARD: 1 FOR EACH TANK

DENSITY CARD: PROTECTS OVERFILL OF MAIN1, 4

 VARIABLE RESISTOR

POWER CARD

30.                 TEST GAGE SW CONNECTED TO DENSITY CARD
31.                 O/R J/P HAS CURRENT DET
32.                 IF BOOST PUMP OFF , FUEL CAN GO TO ENG’S BY BOOST PUMO BYPASS VLV
33.                 ALL VLV ACTUATORS ARE I/W EACH OTHER
34.                 IF O/R J/P REPLACED WITH J/P IN INNERS, 3 PUMP MUST USE NOT 4