3. Job Set-up
__________
Subtask 28-42-43-941-055
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 28-42-43-860-052
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 zone 540 (640).
(4)
Make sure that the applicable access panels are removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-001) and (Ref. TASK 57-27-11-000-002): FOR 13QT1
-
remove 540AB, 540BB, 540DB, 540GB, 540JB, 540KB, 574BB - open 540AZ FOR 13QT2
-
remove 640AB, 640BB, 640DB, 640GB, 640JB, 640KB, 674BB - open 640AZ.
(5)
Make sure that the HOOK-COVER (RIB 2 SURGE DOORS) in installed on the door 540AZ (640AZ).
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C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/FQI/CHAN/1 1QT A13 49VU FUEL/XFR VALVE1/WING/R 2QP A11 49VU FUEL/XFR VALVE1/WING/L 1QP A10 121VU FUEL/FQI/CHANNEL/1 AND 2 8QT L26 121VU FUEL/HI/LVL/SPLY 1QJ L25 121VU FUEL/FQI/CHAN/2 2QT M27 121VU FUEL/XFR VALVE2/WING/R 4QP M23 121VU FUEL/XFR VALVE2/WING/L 3QP M22 121VU FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND 32QA R26 121VU FUEL/CTR TK/PUMPS1 AND 2/CTL AND IND 31QA R25
4. Procedure_________
Subtask 28-42-43-420-092
A. Preparation for Installation
(1)
Get access to the opening 540JB(640JB).
(2)
Use a plastic spatula to remove the sealant from the interface of the connector 4045VC1 (4045VC2) (34) and RIB 15.
(3)
Get access to the opening 540BB(640BB).
(4)
Use a plastic spatula to remove the sealant from the interface of the connector 4039VC1 (4039VC2) (34) and the rear spar.
(5)
Use a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:
-
the flange and the thread of the connector 4039VC1 (4039VC2) (34)
-
the thread of the nut (32)
-
the area of the rear spar around the hole for the connector (34)
-
the flange and thread of the connector 4045VC1 (4045VC2) (34).
(6)
Dry the cleaned areas with compressed air.
(7)
Make sure that the parts retained from the removed component are clean and in the correct condition.
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(8)
Do an inspection of the component interface and/or the adjacent area.
(9)
Get access to the opening 540BB(640BB)
(10)
Identify and attach the ends of the applicable string to the cables for:
-
the fuel probes 21QT1 (22QT2), 23QT1 (23QT2), 25QT1 (25QT2), 27QT1 (27QT2), 29QT1 (29QT2) and 31QT1 (31QT2)
-
the fuel sensors 16QJ1 (16QJ2), 17QJ1 (17QJ2), 29QJ1 (29QJ2) and 38QJ1 (38QJ2)
-
the sensor cadensicon 19QT1 (19QT2)
-
the connectors 4039VC1 (4039VC2) and 4045VC1 (4045VC2) (34).
(11)
Put tape around each of the cable ends of the harness. This will help to let it move more easily through the conduits.
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-228,
Subtask 28-42-43-420-093
R B. Installation of the Wing-Tank Inner-Cell Group A Harness 13QT1 (13QT2)
(1) Install the harness 13QT1 (13QT2) between RIB 2 and RIB 3 as follows: (Ref. Fig. 402/TASK 28-42-43-991-004, 403/TASK 28-42-43-991-006, 404/TASK 28-42-43-991-007)
(a)
Get access through the opening 540AB(640AB) and find the string at the end of the conduit.
(b)
Use the string to carefully pull the harness 13QT1(13QT2) through the conduit until it comes into view.
(c)
Remove and discard the string and the tape from the harness 13QT1(13QT2).
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