(2) If the fault continues, do a check of the L(R) suction valve for full and free movement (Ref. AMM TASK 28-21-00-280-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A279
 May 01/04 CES

 (3) Make sure that the clack valve closes against the valve seat correctly when in the closed position.

 (4) If necessary, replace the L (R) engine LP fuel supply line VALVE ASSY-SUCTION, FUEL PUMP.

 (5) If the fault continues, do a check of, and replace if necessary the:

 - OUTLET (CHECK) VALVE, Part of CANISTER-FUEL PUMP, L(R) WING TK OUTER 1QM(4QM) (Ref. AMM TASK 28-21-52-000-004) and (Ref. AMM TASK 28-21-52-400-004)

 - OUTLET (CHECK) VALVE, Part of CANISTER-FUEL PUMP, L(R) WING TK INNER 2QM(3QM) (Ref. AMM TASK 28-21-52-000-004) and (Ref. AMM TASK 28-21-52-400-004).

 (6) Do the test given in Para. 3.B.

 (7) If the fault continues, examine the related engine LP fuel feed pipes and connections between the wing front spar tank wall and the wing Rib 1 tank wall.

 (8) Repair all unserviceable fuel pipes and connections.

 (9) Do the Leak Test of the Fuel-Pump-System Pipeline (Left(Right) Wing and Fuselage only) (Ref. AMM TASK 28-21-00-790-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A280
 May 01/04R
 CES

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,

 TASK 28-21-00-810-826 Fuel Pumps - Center Tank Pumps 1 and 2 System Malfunction WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 1. Possible Causes
_______________
 - Center Tank Pump No. 1 (Left Side) 37QA System Malfunction

 - Center Tank Pump No. 2 (Right Side) 38QA System Malfunction

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-21-00-810-813  Fuel Pumps - Center Tank Fuel Pump No. 1 (Left Side) 37QA System Malfunction 28-21-00-810-814 Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) 38QA System Malfunction AMM 28-21-00-720-001 Functional Test of the Center-Tank Fuel Control
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the Functional Test of the Center-Tank Fuel Control (Manual Mode) (Ref. AMM TASK 28-21-00-720-001).
 4. Fault Isolation
_______________
 A. Procedure
 (1) If a fuel low pressure indication is given for the two center tank fuel pumps, do the tasks that follow:
 - Fuel Pumps - Center Tank Pump No. 1 (Left Side) 37QA System Malfunction (Ref. TASK 28-21-00-810-813)

 - Fuel Pumps - Center Tank Pump No. 2 (Right Side) 38QA System Malfunction (Ref. TASK 28-21-00-810-814).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A281
 201-299, 401-499, Aug 01/05 CES

R **ON A/C ALL
 TASK 28-21-00-810-827
 Fuel - L(R) Wing Tank Pumps 1, Power Supply (Normal) - C/B-1QA(2QA) Tripped
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 WARNING : DO NOT CLOSE AN OPEN (TRIPPED) CIRCUIT BREAKER RELATED TO A
_______
 FUEL-PUMP.
 IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK:

 - OF FIRE OR OF AN EXPLOSION

 - OF DAMAGE TO THE AIRCRAFT WIRING AND STRUCTURE.

 1. Possible Causes
_______________
 - PUMP-FUEL NO 1, L WING TK (21QA)

 - PUMP-FUEL NO 1, R WING TK (22QA)

 - CNTOR-L WING TK PUMP 1 SPLY (17QA)

 - CNTOR-R WING TK PUMP 1 SPLY (18QA)

 - C/B-FUEL/L WING TK/PUMP 1 SPLY (1QA)

 - C/B-FUEL/R WING TK/PUMP 1 SPLY (2QA)

 - aircraft wiring

 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
 No specific 500VDC insulation tester

 B. Referenced Information
　
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