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 when you do work in a fuel R tank, (Ref. TASK 28-10-00-910-001) and (Ref. TASK 28-10-00-910-002).
(2)
Put the safety barriers in position.
(3)
Make sure that the warning notices are in position in the cockpit to tell persons not to operate the flaps or slats.
(4)
Make sure that the TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER is correctly installed on the flap/slat control lever.
Subtask 57-27-11-860-064
B. Aircraft Maintenance Configuration
(1)
Make sure that the applicable fuel tank has been defuelled (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).
Subtask 57-27-11-865-055
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
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PANEL DESIGNATION IDENT. LOCATION
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R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
49VU FUEL/XFR VALVE1/WING/R 2QP A11
49VU FUEL/XFR VALVE1/WING/L 1QP A10
**ON A/C ALL
49VU FUEL/X FEED/VALVE/MOT1 2QE A12
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
121VU FUEL/CTR TK/PUMP2 SPLY 30QA P26
121VU FUEL/CTR TK/PUMP1 SPLY 29QA P23
**ON A/C ALL
121VU FUEL/RFL/DFL/SPLY 2QU L24 121VU FUEL/RFL/DFL/XFR/DEFUEL/VALVE 1QU L23 121VU FUEL/L WING TK/PUMP2 SPLY 7QA N26 121VU FUEL/L WING TK/PUMP1 SPLY 1QA N23 121VU FUEL/R WING TK/PUMP2 SPLY 8QA Q26 121VU FUEL/R WING TK/PUMP1 SPLY 2QA Q23
**ON A/C 301-399,
121VU FUEL/CTR TK/AUTO/CTL 3QL R27 121VU FUEL/CTR TK/L&R XFR/CTL & IND 2QL R26 121VU FUEL/CTR TK/L&R XFR/CTL & IND 1QL R25R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 57-27-11-010-062
D. Get Access
(1)
Make sure that the adjustable access platform is in position below the applicable access panel, zone 540(640).
(2)
For panels 540NB(640NB) or 540PB(640PB), make sure that the forward and aft fixed fairings of the flap track 4 have been removed (Ref. TASK 57-55-11-000-001).
(3)
For panels 540NB(640NB), make sure that the bolts (13) and the flap-track fairing support-bracket (12) have been removed.
**ON A/C 301-399,
Subtask 57-27-11-010-062-A
D. Get Access
(1)
Make sure that the adjustable access platform is in position below the applicable access panel, zone 540(640).
(2)
For panels 540NB(640NB) or 540PB(640PB), make sure that the forward and aft fixed fairings of the flap track 4 have been removed (Ref. TASK 57-55-11-000-004).
**ON A/C ALL
4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 403/TASK 57-27-11-991-002)
**ON A/C 301-399,
(Ref. Fig. 403A/TASK 57-27-11-991-002-A)
**ON A/C ALL
Subtask 57-27-11-560-051
A. Preparation of a Component for Installation
(1)
Examine the applicable sealing ring (1) thru (8) for damage. If necessary remove and discard it.
(2)
Use a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:
-
the groove in the access panel (11) for the applicable sealing ring
(1) thru (8)
-
the interface of the access panel (11) and the wing bottom skin (9).
(3)
Examine for damage the interfaces of:
-
the access panel (11)
-
the wing bottom skin (9)
-
the bolt holes in the access panel (11).
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 57-27-11-420-059
R B. Preparation for Installation
(1)
For the panel 550CB(650CB), make sure that the overpressure protector is installed (Ref. TASK 28-12-41-400-001).
(2)
Apply a thin layer of SEALANTS (Material No. 09-007) to the groove in the access panel (11) for the applicable sealing ring (1) thru (8).
(3)
Make sure that the sealant is touch-dry before you install the applicable sealing ring.
(4)
Put the applicable sealing ring (1) thru (8) (flat edge down) in the groove in the access panel (11):
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