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R  of relay-8PR. When the L/G control lever is in the DOWN position 
R  and the refuel panel door is open, a ground is supplied to pin X2 
R  of relay-8PR. When the relay-8PR is energized 28VDC is supplied to 
R  the Refueling buses 501PP and 502PP. 
R  (1) Do a check of and replace, if necessary, the items that follow: 
R  (a) The MSW-REFUEL/DEFUEL CTL PNL DOOR POSITION (20QU). 
R  1_  Use a multimeter to make sure that there is continuity between
R  receptacle 20QU-A, pins D and F, with the door in the OPEN 
R  position (Ref. ESPM 20-52-21). 
R  (b) The LEVER-L/G NORM CTL (6GA) (Ref. AMM TASK 32-31-11-000-001) and 
R  (Ref. AMM TASK 32-31-11-400-001). 
R  1_  Use a multimeter to make sure that there is continuity between
R  receptacle 6GA-A, pins E and L, with the lever in the DOWN 
R  position (Ref. ESPM 20-52-21). 
R  (c) The diode (part of the diode module 80VD between terminals 11 and 
R  26 at 92VU). 
R  1_  Make sure that there is forward continuity between terminal 11
R  (cathode) and 26 (anode). 
R  (2) If the fault continues: 
R  (a) Do a check (Ref. ESPM 20-00-00) of the aircraft wiring that 
R  follows (Ref. ASM 24-67/01): 
R  - between the relay 8PR base, terminal X2 and the diode module 
R  80VD, terminal 26 (Ref. AWM 24-67-01) (Ref. AWM 28-42-01) and 
R  (Ref. AWM 28-42-02) 
R  - diode module 80VD, terminal 11 and the landing gear lever 
R  connector 6GA-A, pin E 
R  - between the landing gear lever connector 6GA-A, pin L and the 
R  refuel panel door M/SW connector 20QU-A, pin D (Ref. AWM 28-42-
R  02) 
R  - between the refuel panel door M/SW connector 20QU-A, pin D and 
R  the aircraft ground point (Ref. AWM 28-42-02). 
R  (b) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-
R  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 : ALL ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 264
 Nov 01/04 CES

 

R (c) Do the tests given in Para. 3.B. and C.

R (3) If the fault continues, do the related TSM Task in Chapter 24 R (Ref. TASK 24-67-00-810-801).
 「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 ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 265
 Nov 01/04 CES

 

 REFUEL/DEFUEL SYSTEM - TASK SUPPORTING DATA
___________________________________________
 1. General
_______
 The diagrams that follow are to help you do the trouble-shooting tasks.

 For the Refuel/Defuel System:

 - Physical Layout see R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 301)
 **ON A/C 301-399,

 (Ref. Fig. 301A)
 **ON A/C ALL

 - Fuel Flow Block Diagram see R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 302)
 **ON A/C 301-399,

 (Ref. Fig. 302A)
 **ON A/C ALL

 - Refuel Valve Control Block Diagram see R **ON A/C 001-049, 052-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 303)
 **ON A/C 051-051,

 (Ref. Fig. 303A)
 **ON A/C ALL

 - Auto Refuel Preselection and Quantity Indication Block Diagram see
 「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 ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 301
 Aug 01/05 CES

 

 Refuel/Defuel System - Physical Layout
 Figure 301

 「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, ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 302
 201-299, 401-499, Aug 01/05 CES

 

R Refuel/Defuel System - Physical Layout R Figure 301A
 「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 : 301-399, ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 303
 May 01/04 CES

 

 Refuel/Defuel System - Fuel Flow Block Diagram
 Figure 302
　
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