(3) Install the fuel pump cover assembly (Ref. AMM TASK 28-21-51-400-001).
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(4) Install the fuel pump fairings (Ref. AMM TASK 28-21-49-400-001). Make sure that the fuel pump supply cable:
- is held correctly by the tape hooks (post SB 24-1070)
- does not get caught under the fairings (this is very important in the area adjacent to the fairing attachment bolts).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
**ON A/C ALL
R Post SB 28-1093 For A/C 001-049,051-099,101-105,151-154,201-207,
A. Close Access
(1) Make sure that the fuel pump is installed correctly and the two bolts that attach the pump have been torque tightened (Ref. AMM TASK 28-21-51-400-001).
(2) Make sure that the fuel pump supply cable end connector 22QA-A is connected to the fuel pump electrical receptacle.
(3) Install the fuel pump cover assembly (Ref. AMM TASK 28-21-51-400-001).
(4) Install the fuel pump fairings (Ref. AMM TASK 28-21-49-400-001). Make sure that the fuel pump supply cable does not get caught under the fairings.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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**ON A/C ALL
TASK 28-21-00-810-803
Fuel Pumps - Left Wing Tank Fuel Pump No. 2 (Inner) 25QA System Malfunction
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.
R WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ R EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL R SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, R UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE R FIRE OR AN EXPLOSION.
1. Possible Causes
_______________
- PUMP-FUEL NO 2, L WING TK (25QA)
- CNTOR-L WING TK PUMP 2 SPLY (19QA)
- PRESS SW-FUEL PUMP NO 2, L WING TK (27QA)
- SEQUENCE VALVE of the fuel-pump (25QA)
- C/B-FUEL/L WING TK/PUMP 2 SPLY (7QA)
- aircraft wiring
- pressure switch sealing valve
- pressure switch plug (banjo adaptor attachment bolt)
- pressure switch fuel supply pipe-line between the fuel pump canister 2QM and the pressure switch 27QA
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
No specific 500VDC insulation tester
99A28404000000 1 ADAPTOR - SEQUENCE VALVE
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B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-21-00-810-828 Fuel - L(R) Wing Tank Pumps 2, Power Supply -
C/B-7QA(8QA) Tripped AD 2002-221(B) ASRM 57-21-11 AWM 93-01-07 AWM 93-01-20 AWM 93-01-21 ESPM 20-52-21 ESPM 20-52-24 ESPM 20-53-21 AMM 28-21-00-710-001 Operational Test of the Wing-Tank Fuel Control AMM 28-21-00-710-007 Operational Test of the Main Fuel-Pump System with
Fuel Flow by Transfer AMM 28-21-15-000-003 Removal of the Fuel-Pump Pressure-Switch. AMM 28-21-15-400-001 Installation of the Fuel-Pump Pressure-Switch. AMM 28-21-45-000-001 Removal of the Sequence Valve AMM 28-21-45-400-003 Installation of the Sequence Valve AMM 28-21-49-000-001 Removal of the Fuel Pump Fairings AMM 28-21-49-400-001 Installation of the Fuel Pump Fairings AMM 28-21-51-000-001 Removal of the Fuel Pumps 21QA(26QA) and 25QA(22QA) AMM 28-21-51-400-001 Installation of the Fuel Pumps 21QA(26QA) and
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