(b) If necessary, do Internal Fuel Leak Which Causes a Fuel Imbalance or a Discharge From a NACA Vent During Taxi or Flight (Ref. TASK 28-21-00-810-825).
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R **ON A/C ALL
R TASK 28-25-00-810-817
R No Power to the REFUEL/DEFUEL PNL (800VU)
R WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______ R 1. Possible Causes
_______________
R - MSW-REFUEL/DEFUEL CTL PNL DOOR POSITION (20QU)
R - LEVER-L/G NORM CTL (6GA)
R - diode module 80VD
R - aircraft wiring
R 2. Job Set-up Information
______________________ R A. Fixtures, Tools, Test and Support Equipment R -------------------------------------------------------------------------------
R REFERENCE QTY DESIGNATION R -------------------------------------------------------------------------------R No specific multimeter
R B. Referenced Information R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 24-67-00-810-801 R 28-42-00-810-870 R R ESPM 20-00-00 R ESPM 20-52-21 R AMM 12-11-28-650-003 R AMM 32-31-11-000-001 R R AMM 32-31-11-400-001 R R ASM 24-67/01 R AWM 24-67-01 R AWM 28-42-01 R AWM 28-42-02Refueling not Possible Fuel - All FQIS Indicators Show Blank During Refuel on Battery
Pressure Refuel with Automatic Control Removal of the Landing Gear Normal Control lever (6GA) Installation of the Landing Gear Normal Control Lever (6GA)
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R 3. Fault Confirmation
__________________
R A. Table of the circuit breakers referred to in this procedure:
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 121VU FUEL/RFL/DFL/SPLY 2QU L24 R 122VU ELEC/REFLNG/NORM 2PR S27 R 122VU ELEC/RFL/SPLY/LOGIC 4PR U29 R 122VU ELEC/REFLNG/ON/BAT 1PR U28
R B. Prerequisite test
R NOTE : This initial test is done to make sure that the L/G control lever
____ R (6GA) contacts operate correctly. A fault (example - high R resistance contacts) on receptacle 6GA-A, between pins E and L, R will not show during a L/G system check, as they are only used in R the refuel system. The procedure that follows will remove a R possible intermittent (spurious) condition that can cause the R initial fault condition.
R (1) Cycle the Landing Gear control lever 6GA as follows:
R (a) Do the test of the L/G control lever, as given in the procedure R for the installation of the lever (Ref. AMM TASK 32-31-11-400-R 001).
R (b) Do the test in Para. 3.C.
R C. Test
R (1) Make sure that the C/Bs that follow are closed: R - C/B-1PR R - C/B-2PR R - C/B-4PR R - C/B-2QU.
R (2) Do a test of the Refuel Panel 800VU as given in the refuel procedure R (Ref. AMM TASK 12-11-28-650-003). R R - if the refuel panel will not power-up, do Para. 4.A., and then do R the TSM procedure, Refueling not Possible (Ref. TASK 24-67-00-810-R 801) R R - if, during a battery refuel, the refuel/defuel flood light comes R on, the refuel panel HI LVL lights come on and the DEFUEL/XFR/OPEN R light comes on, but the FQI indicator displays on 5QT and 6QT show R blank, do the TSM procedure (Ref. TASK 28-42-00-810-870).
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R 4. Fault Isolation
_______________
R A. Procedure
R NOTE : This procedure only gives trouble-shooting for the control circuit____
R for relay-8PR, between pin X2 and the ground on M/SW 20QU (Ref.
R ASM 24-67/01).
R NOTE : When the C/Bs 1PR and 2PR are closed, 28VDC is supplied to pin X1____
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