3. Job Set-up
__________
Subtask 28-12-41-941-066
A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
(1) You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(2) Make sure that the safety barriers are in position.
Subtask 28-12-41-860-050
B. Aircraft Maintenance Configuration
(1)
Make sure that the remaining fuel has been drained from the applicable surge tank (Ref. TASK 28-25-00-650-003).
(2)
Make sure that the access platform is below the applicable zone 550(650).
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(3) Make sure that the applicable panel assembly 550CB(650CB) is removed
(Ref. TASK 28-12-45-000-001).
4. Procedure
_________
(Ref. Fig. 401/TASK 28-12-41-991-003)
Subtask 28-12-41-420-053
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 interface and/or the adjacent area with a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-004).
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(4)
Lubricate the new O-ring (2) and the new O-rings (6) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).
Subtask 28-12-41-420-050
B. Installation of the Overpressure Protector 46QM (47QM9
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.
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(1)
Put the bolts (4) and the new O-rings (6) in position.
(2)
Install the new O-ring (2) on the overpressure protector (1).
(3)
Put the overpressure protector (1) in position on the access panel (3). Make sure that the dowel engages in the dowel hole (5).
(4)
Install the nuts (7). Align the hole in the overpressure protector
(1) with the hole in the access panel (3). Tighten the bolts (4).
(5)
Do a bonding check between the overpressure protector and the access panel (Ref. TASK 20-28-00-912-002). The bonding resistance must be less than 10 milliohms.
(6)
Apply SEALANTS (Material No. 09-017) over the nuts (7) and the ends of the bolts (4).
5. Close-up
________ Subtask 28-12-41-410-054
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 28-12-45-400-002):
-
FOR 46QM
install 550CB
-
FOR 47QM
install 650CB.
Subtask 28-12-41-942-053
B. 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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R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
TASK 28-12-41-000-002
Removal of the Overpressure Protector 102QM (103QM)
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
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