(b) If the P/BSW-FUEL/R TK PUMPS/1 (14QA) FAULT legend stays on go to step (d). If the P/BSW-FUEL/R TK PUMPS/1 (14QA) FAULT legend goes off:
- do a check of and replace, if necessary, the PRESS SW-FUEL PUMP NO 1, R WING TK (24QA) (Ref. AMM TASK 28-21-15-000-003) and (Ref. AMM TASK 28-21-15-400-001).
NOTE : The fuel-pump fuel pressure can be measured at the sealing
____ valve outlet using an ADAPTOR - SEQUENCE VALVE (99A28404000000). This can be installed in place of the pressure switch 24QA (Ref. AMM TASK 28-21-45-400-003).
(c) If the fault continues, or if no fuel pressure is shown on the gage of the ADAPTOR - SEQUENCE VALVE, make sure that these components are in the correct condition:
- the pressure switch sealing valve
- the pressure switch plug (banjo adaptor attachment bolt)
「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, 101-105, 151-154, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page 235
201-207, May 01/05 CES
- the pressure switch fuel supply pipe-line between the fuel pump canister 3QM and the pressure switch 24QA.
NOTE : The pressure switch 24QA fuel supply pipe-line is also
____
connected to the CHECK VALVE-FUEL PUMP, R WING TK INR
(35QM).
The check valve 35QM is in one of the primary fuel supply
pipe-lines to the right wing scavenge jet pumps 68QM and
69QM.
1_ Repair/replace the components that are unserviceable.
2_ Do the test given in Para. 3.B.(2)(b).
(d) If the P/BSW-FUEL/R TK PUMPS/1 (14QA) FAULT legend stays on, do a check of the aircraft wiring (low pressure lines) (Ref. ASM 28-21/01) between the:
- pressure switch connector 24QA-A, pin C and the FLSCU-2 rack connector 9QJ-AA, terminal 13C
- pressure switch connector 24QA-A, pin C and the SDAC-1 rack connector 1WV1-AD, terminal 1K
- pressure switch connector 24QA-A, pin C and the SDAC-2 rack connector 1WV2-AD, terminal 1K
- pressure switch connector 24QA-A, pin C and the BOARD-ANN LT TEST & INTFC connector 6LP-A, terminal 34
- BOARD-ANN LT TEST & INTFC connector 6LP-A, terminal 18 and the P/BSW-FUEL/R TK PUMPS/1 connector 14QA-A, terminal 7.
NOTE : A short circuit to ground on one of these lines can cause:
____
- a false LO PR warning to be generated within the FWC
- the FAULT legend/lamp to come on incorrectly. It is possible that a short circuit to ground on one of these lines can come from one of the LRUs as follows:
- BOARD-ANN LT TEST & INTFC (6LP)
- FLSCU-2 (9QJ)
- SDAC-1 (1WV1)/SDAC-2 (1WV2).
(e) Repair the unserviceable wiring and connectors.
(f) Do the test given in Para. 3.B.(2)(b).
**ON A/C 301-399,
A. Procedure
(1) If a fuel low pressure indication is shown for the right wing tank fuel pump No. 1 (22QA):
- do a fuel transfer (Ref. AMM TASK 28-21-00-710-007) use the right wing tank fuel pump No. 1 to do the fuel transfer.
「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, 101-105, 151-154, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page 236
201-207, 301-399, May 01/05 CES
R (2) If the fuel starts to transfer go to step (3). If the fuel does not
R start to transfer:
R (a) Set the R TK PUMPS 1 P/BSW (14QA) to OFF (release out). This will
R de-energize the contactor 18QA.
R (b) Before you do more steps, make sure that the wing area adjacent
R to the right inner fuel pump 22QA fairings and cover is not
R contaminated with fuel from a fuel leak or spillage.
R 1_ If necessary:
R a_ Repair all the leaks:
R - (Ref. AMM TASK 51-76-12-300-001)
R - (Ref. AMM TASK 51-76-12-300-002)
R - (Ref. SIL 57-0086).
R b_ Clean the area of the fuel spillage.
R (c) Remove all the fuel pump 22QA cable fairings (Ref. AMM TASK 28-R 21-49-000-001) and cover assembly (Ref. AMM TASK 28-21-51-000-R 001).
R (d) Disconnect the supply cable end connector 22QA-A from the fuel
R pump receptacle.
R (e) If, in step (c) or (d), any damage can be seen on the supply
R cable or the aircraft structure, go to step (j) 1_.
R (f) Set the R TK PUMPS 1 P/BSW (14QA) to ON (push in). This will
R energize the contactor 18QA and the 115VAC three phases will be
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