- pressure seal feedthrough 7505VP
- receptacle 7509VC-A, pins H, W, G, M, Z, N and <A
- adjacent and related connecting wires.
2 Electrical Tests
_ Do a continuity test (Ref. ESPM 20-52-21) and a test for a short circuit (Ref. ESPM 20-52-22) of the wires that follow (Ref. AWM 28-42-14) and (Ref. AWM 28-42-15):
- FQIC rack connector 3QT-A, pin 7H to connector 7509VC-A, pin H (permittivity signal)
- FQIC rack connector 3QT-A, pin 5H to connector 7509VC-A, pin W (common drive return)
- FQIC rack connector 3QT-A, pin 15G to connector 7509VC-A, pin G (common drive)
- FQIC rack connector 3QT-A, pin 6F to connector 7509VC-A, pin M (density signal)
- FQIC rack connector 3QT-A, pin 7F to connector 7509VC-A, pin Z (density signal return)
- FQIC rack connector 3QT-A, pin 9F to connector 7509VC-A, pin N (density supply/drive)
- FQIC rack connector 3QT-A, pin 10F to connector 7509VC-A, pin <A (density supply/drive return).
(d) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).
「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 : 001-049, 051-061, 101-105, 201-203, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page 230
Aug 01/05R CES
(e) Connect the connector 7509VC-A to the tank wall receptacle 7509VC.
(f) Install the initial FQIC 3QT (Ref. AMM TASK 28-42-34-400-001).
(g) Do the test given in Para. 3.B.
(4) If the fault continues, drain and open the tank to the air (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).
(5) Do a check of the HARNESS-CHAN A, CTR TK (17QT) (Ref. AWM 28-42-14) and (Ref. AWM 28-42-15) and replace, if necessary, (Ref. AMM TASK 28-42-44-000-001) and (Ref. AMM TASK 28-42-44-400-001).
(6) If the harness 17QT is serviceable, replace the CADENSICON-CTR TK (20QT) (Ref. AMM TASK 28-42-16-000-002) and (Ref. AMM TASK 28-42-16-400-002).
NOTE : Make sure that the cadensicon transit pin is removed.
____
NOTE : If the center tank cadensicon sensor is replaced, 2000kg
____ (4400lb) of fuel must be put in the center tank before you can fully test the cadensicon.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Post SB 28-1087 For A/C 001-049,051-061,101-105,201-203,
A. Procedure
(1) Temporarily replace the FQIC 3QT with a serviceable item (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
NOTE : The step (1) has been included because it is important to make
____ sure that the FQIC 3QT is serviceable before you start more steps.
(2) If the message C CADENSICON 20QT is not shown:
- complete the installation of the FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(3) If the message C CADENSICON 20QT is shown:
- install the initial FQIC 3QT (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(4) Get access to the tank wall connector 7509VC and fused adaptor in the right MLG bay (Ref. AMM TASK 32-12-00-010-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page 231
201-299, 401-499, Aug 01/05 CES
(5) Remove the fused adaptor at the tank wall connector 7509VC.
NOTE : The fused connector is installed between the tank wall
____ connector 7509VC and the free connector 7509VC-A. All of the capacitive drive return wires go through a fuse.
(6) Use a multimeter to do a check for continuity, of the related in line fuse (Ref. ASM 28-42/09) between the pins W and W.
(7) If the continuity test shows:
(a) The fuse has continuity (serviceable), install the serviceable fused adaptor and continue with step (8).
(b) The fuse is open circuit (first time unserviceable):
1 Replace the fused adaptor at 7509VC with a serviceable item.
_
2 Do the test given in Para. 3.B.
_
(c) The fuse is open circuit (second time unserviceable):
1 Continue with step (8), only replace the fused adaptor at
_ 7509VC when the cause of the short circuit has been identified and corrected.
(8) Remove the FQIC 3QT (Ref. AMM TASK 28-42-34-000-001).
(9) Get access to the tank wall connector 7509VC in the right MLG bay (Ref. AMM TASK 32-12-00-010-001).
(10) Do a visual inspection and electrical tests of the aircraft wiring (Ref. AWM 28-42-14) and (Ref. AWM 28-42-15) between the FQIC rack connector 3QT-A and the tank wall connector 7509VC-A as follows:
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