**ON A/C 301-399,
28-25-42-991-001-C Fig. 401B
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499, Post SB 28-1077 For A/C 001-049,051-061,101-103,201-203, 28-25-42-991-001-B Fig. 401C **ON A/C ALL
3. Job Set-up
__________
Subtask 28-25-42-941-054
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 28-10-00-910-001) when you do work in a fuel tank.
(2) Make sure that the safety barriers are in position.
Subtask 28-25-42-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU FUEL/RFL/DFL/SPLY 2QU L24 121VU FUEL/RFL/DFL/XFR/DEFUEL/VALVE 1QU L23
1EFF : ALL 1 28-25-42Page 412 1 1 Aug 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 28-25-42-860-052
C. 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 540KB (640KB).
(4)
Make sure that the applicable access panel 540KB (640KB) is removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-002).
(5)
Make sure that the pipe assembly is removed (Ref. TASK 28-00-00-000-001).
**ON A/C 301-399,
Subtask 28-25-42-860-052-A
C. 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 540HB (640HB).
(4)
Make sure that the applicable access panel 540HB (640HB) is removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-002).
1EFF : ALL 1 28-25-42Page 413 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL
4. Procedure
_________
**ON A/C 001-001, 051-052,
(Ref. Fig. 401/TASK 28-25-42-991-001)
**ON A/C 002-049, 053-061, 101-103, 201-203,
(Ref. Fig. 401A/TASK 28-25-42-991-001-A)
**ON A/C 301-399,
(Ref. Fig. 401B/TASK 28-25-42-991-001-C) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499, Post SB 28-1077 For A/C 001-049,051-061,101-103,201-203, (Ref. Fig. 401C/TASK 28-25-42-991-001-B) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 28-25-42-420-052
A. Preparation for Installation
(1)
Use a clean MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:
-
the interface of the diffuser (8)
-
the bonding lug
-
the bolts (4) and (7) and the washers (6)
-
the screw (1), the nut (3)
-
the end of the bonding strip (2)
-
the interface of the support bracket assembly and the support angle assembly.
(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.
1EFF : ALL 1 28-25-42Page 414 1 1 Aug 01/05 1 1 1CES 1
(4) Lubricate the new O-ring (5) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).
**ON A/C 301-399,
Subtask 28-25-42-420-052-A
A. Preparation for Installation
(1)
Use a clean MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:
-
the interface of the diffuser (2)
-
the bonding lug
-
the bolts (5) and (6)
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