TASK 28-21-00-810-821

 Fuel Pumps - Center Tank Autofeed Failure (Pumps Do Not Stop At Wing-Tank(s)
 Innercell Full Level)
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
 1. Possible Causes
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 - RELAY-CTR TK AUTO CONTROL, PUMP 1(2) 41QA(42QA) 92VU
 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 28-21-00-810-817 Fuel Pumps - Center Tank Fuel Pump No. 1 (Left Side) Contactor Control Failure (Manual Control) 28-21-00-810-818 Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) Contactor Control Failure (Manual Control) AMM 28-21-00-720-001 Functional Test of the Center-Tank Fuel Control
 3. Fault Confirmation
__________________
 A. Do the Functional Test of the Center-Tank Fuel Control (in manual and auto control modes) (Ref. AMM TASK 28-21-00-720-001).
 4. Fault Isolation
_______________
 A. If the:
 (1) Center-Tank Fuel Pumps No 1 do not operate correctly in the Manual Mode do:
 (a) Fuel Pumps - Center Tank Pump-Fuel No 1 System Failure (Ref. TASK 28-21-00-810-813).

 (b) Fuel Pumps - Center Tank Pump-Fuel No 1 Contactor Control Failure (Ref. TASK 28-21-00-810-817).

 「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 A262
 201-299, 401-499, Aug 01/05 CES

 (2) Center-Tank Fuel Pumps No 2 do not operate correctly in the Manual Mode do:

 (a) Fuel Pumps - Center Tank Pump-Fuel No 2 System Failure (Ref. TASK 28-21-00-810-814).

 (b) Fuel Pumps - Center Tank Pump-Fuel No 2 Contactor Control Failure (Ref. TASK 28-21-00-810-818).

 (3) If a pump does not stop during the test given in Para. 3.A., Auto Mode:

 - examine the ECAM FUEL System Display page to see which side(s) has/have not shut off correctly.
 NOTE : The CTR TANK PUMP INDICATIONS are:
____

 - In line - Green - Pump pressure normal (pump contactor on)

 - LO - Amber - Pump low pressure (pump contactor on)

 - Cross line - Green - Pump contactor off and auto shut off required

 - Cross line - Amber - Pump contactor off and auto shut off not required.

 NOTE : For the ECAM warning/caution - AUTO FEED FAULT to have been
____ given by the FWC, a CTR TK PUMP 1 or 2 AUTO SHUT OFF REQUIRED signal has been received. This shows that:
 - the FLSCU-1(2) input of CTR TK PUMP RECIRCULATION CTL off (a ground) has operated correctly

 - the RELAY 51QA(52QA) has operated correctly (remained de-energized)

 - the RELAY 41QA(42QA), contacts C to 6 (the source of the AUTO SHUT OFF REQUIRED signal) have operated correctly (energized).

 (4) If the fault continues:

 - do a check of the RELAY-CTR TK AUTO CONTROL, PUMP 1(2) 41QA(42QA) 92VU (contacts B to 3) and replace if necessary.

 (5) Do the test given in Para. 3.A.

 「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 A263
 201-299, 401-499, Aug 01/05 CES

R **ON A/C ALL

 TASK 28-21-00-810-822 Fuel Pumps - Left Wing Tank Pumps 1 And 2 System Failure WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________

 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 28-21-00-710-001 Operational Test of the Wing-Tank Fuel Control
 3. Fault Confirmation
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