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B. Aircraft Maintenance Configuration
(1)
Make sure that the applicable fuel tank is defueled (Ref. TASK 28-25-00-650-001).
(2)
Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. TASK 28-25-00-650-003).
(3)
Make sure that the access platform is below the applicable access panel 540RB(640RB).
(4)
Make sure that the applicable wing access panel is removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-002):
-
FOR 37QM
540RB
-
FOR 38QM
640RB
Subtask 28-21-43-865-057
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU FUEL/L WING TK/PUMP2 SPLY 7QA N26 121VU FUEL/L WING TK/PUMP1 SPLY 1QA N23 121VU FUEL/CTR TK/PUMP2 SPLY 30QA P26 121VU FUEL/CTR TK/PUMP1 SPLY 29QA P23 121VU FUEL/R WING TK/PUMP2 SPLY 8QA Q26 121VU FUEL/R WING TK/PUMP1 SPLY 2QA Q23 123VU L WING TK/PUMP 1/STBY SPLY 11QA AD12 123VU R WING TK/PUMP 1/STBY SPLY 12QA AE12
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4. Procedure
_________
(Ref. Fig. 403/TASK 28-21-43-991-003) Subtask 28-21-43-420-054
A. Preparation for Installation
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
(1)
Clean the component interfaces and the adjacent areas with a 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)
Make sure that the check-valve (2) opens and closes correctly.
(5)
Lubricate the new O-ring (3) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).
Subtask 28-21-43-420-055
B. Installation of the Fuel-Pump Check-Valve 37QM(38QM)
(1)
Install the O-ring (3) on the check-valve (2).
(2)
Remove the blanking plugs from the disconnected line ends.
(3)
Install the check-valve (2) to the pipe assembly (4).
(4)
Connect the pipe (1) at the check-valve (2).
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5. Close-up
________ Subtask 28-21-43-410-052
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the wing access panel (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-400-002):
-
FOR 37QM
install 540RB.
-
FOR 38QM
install 640RB.
Subtask 28-21-43-865-058
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1QA, 2QA, 7QA, 8QA, 11QA, 12QA, 29QA, 30QA
Subtask 28-21-43-860-054
C. Aircraft Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. TASK 12-11-28-650-003), (Ref. TASK 28-25-00-650-001) or (Ref. TASK 28-25-00-869-001).
Subtask 28-21-43-942-054
D. Removal of Equipment
(1)
Remove the safety barriers.
(2)
Remove the warning notice(s).
(3)
Remove the access platform(s).
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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_______________________________________
TASK 28-21-45-000-001
Removal of the Sequence Valve
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
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