WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
(1)
You must obey the safety procedures (Ref. TASK 28-10-00-910-001) when you do work in a fuel tank.
(2)
Put a warning notice in the cockpit to tell persons not to operate the flight controls.
(3)
Put the safety barriers in position.
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Subtask 28-11-00-650-111
B. Fuel Configuration
(1)
Defuel the applicable fuel tanks (Ref. TASK 28-25-00-650-001).
(2)
Drain the remaining fuel from the applicable fuel and vent surge tank (Ref. TASK 28-25-00-650-003).
Subtask 28-11-00-860-065
C. Aircraft Maintenance Configuration
(1)
Extend the flaps fully (Ref. TASK 27-50-00-866-008).
(2)
Make sure that the LOCKING TOOL - FLAP/SLAT CONTROL LEVER (98D27803000000) is on the slat/flap control lever.
(3)
Extend the spoilers (Ref. TASK 27-60-00-866-002).
(4)
Make sure that the COLLAR-SAFETY, SPOILER (98D27604000000) is on the spoiler servo-controls.
Subtask 28-11-00-865-079
D. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
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/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
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-------------------------------------------------------------------------------
R PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C 301-399,
R R 121VU FUEL/CTR TK/L&R XFR/CTL & IND 121VU FUEL/CTR TK/L&R XFR/CTL & IND 2QL 1QL R26 R25
R **ON A/C ALL
R R 123VU L WING TK/PUMP 1/STBY SPLY 123VU R WING TK/PUMP 1/STBY SPLY 11QA 12QA AD12 AE12
Subtask 28-11-00-010-062
E. Get Access
(1) Put the adjustable access platform in position below the applicable access panel.
(2) Remove the applicable wing leading-edge access panels, to get access to the front of the fuel tanks.
(3) Remove the applicable wing trailing edge access panels, to get access to the rear of the fuel tanks.
(4) Remove the applicable fuel tank access panels (Ref. TASK 28-10-00-910-002) (Ref. TASK 57-27-11-000-001) (Ref. TASK 57-27-11-000-002).
4. Procedure_________
Subtask 28-11-00-790-057
A. Leak Test
(1) Use a soft brush to apply SPECIAL MATERIALS (Material No. 05-004) to the internal surfaces of the fuel tank.
(2) Compressed air procedure.
WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
(a) Point a low pressure, dry and filtered air supply at the leak area from outside of the tank.
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(3) Where there are bubbles in the tank, mark the location of the leak. ________
5. Close-up
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 28-11-00-410-060
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the applicable fuel tank access panels (Ref. TASK 57-27-11-400-001) (Ref. TASK 57-27-11-400-002).
(3)
Install the applicable wing leading-edge access panels.
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