1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific safety barriers
No specific warning notice
No specific access platform 4.0 m (13 ft. 1 in.)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R Material No. 01-001 USA ASTM-D-1655-93 (JET A-1) FUEL, TURBO (Ref. 20-31-00)
Material No. 11-004 USA MIL-T-81533
1.1.1TRICHLOROETHANE (METHYL CHLOROFORM)
(Ref. 20-31-00)
Material No. 19-003 USA AMS 3819
LINT-FREE COTTON CLOTH (Ref. 20-31-00)
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-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
5 O-ring 28-25-51 01 -060 6 O-ring 28-25-51 01 -050
D. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-11-28-650-003 Pressure Refuel with Automatic Control
28-00-00-910-001 Fuel Safety Procedures
28-25-00-650-001 Pressure Defuel
28-25-00-869-001 Fuel Transfer
32-12-00-010-001 Open the Main Gear Doors for Access
32-12-00-410-001 Close the Main Gear Doors after Access
28-25-51-991-003 Fig. 403
3. Job Set-up
__________
Subtask 28-25-51-941-057
A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
R (1) You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) R when you do work in a fuel system.
(2)
Make sure that the safety barriers are in position.
(3)
Make sure that the warning notice is in position to tell persons not to operate the main gear doors.
Subtask 28-25-51-860-053
B. Aircraft Maintenance Configuration
(1) For the solenoid valve of the refuel valve 10QU:
(a) Make sure that the main gear doors are open (Ref. TASK 32-12-00-010-001).
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(b)
Make sure that the GROUND LOCK SLEEVE (460005835) is on the applicable main gear door actuator.
(c)
Make sure that the access platform is below the refuel valve 10QU.
(2) For the solenoid valve of the refuel valve 7QU (8QU):
(a)
Make sure that the access platform is in position below the applicable access panel 522JB (622JB).
(b)
Make sure that the applicable access panel 522JB (622JB) is removed.
4. Procedure
_________
(Ref. Fig. 403/TASK 28-25-51-991-003) Subtask 28-25-51-420-056
A. Preparation for Installation
(1)
Clean the component interface and/or the adjacent area with MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-004).
(2)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(3)
Do an inspection of the component interface and/or the adjacent area.
(4)
Lubricate the new O-ring (5) and the new O-ring (6) with FUELS (Material No. 01-001).
(5) Install the O-rings (5) and (6) on the solenoid valve (4). Subtask 28-25-51-420-053
B. Installation of the Solenoid Valve
(1)
Install the solenoid valve (4) in the refuel valve (7).
(2)
Install the bolts (2) and the washers (3). Tighten the bolts (2).
(3)
Remove the blanking caps from the electrical connectors.
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(4) Make sure that the electrical connectors are clean and in the correct
condition.
(5) Install the electrical connector (1). Subtask 28-25-51-650-059
C. Preparation for Test
(1) If necessary, defuel (Ref. TASK 28-25-00-650-001) or transfer fuel (Ref. TASK 28-25-00-869-001) so that the applicable tank has space for 250 kgs (551.25 lbs) of fuel.
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