Safety Procedures When You Do Work in a Fuel Tank
Access to the Fuel Tanks and the Work Areas
Pressure Defuel
To Drain Remaining Fuel from the Wing Tanks and the
Center Tank
Removal of the Wing Tank Fuel-Quantity Probe
(21QT1/2,23QT1/2,25QT1/2,26QT1/2,2
7QT1/2,28QT1/2,29QT1/2,30QT1/2,34QT1/2,54QT1/2,56QT1/
2,59QT1/2,60QT1/2,61QT1/2)
Removal of the Wing-Tank Fuel-Level Sensors
Removal of the Temperature Sensor 29QJ1 (29QJ2)
Removal of the IDG Shut-off Sensor.
Removal of the Access Panel (540AB, 540BB, 540CB,
540DB, 540EB, 540FB, 540GB, 640AB, 640BB, 640CB,
640DB, 640EB, 640FB, 640GB)
Removal of the Access Panel (540HB, 540JB, 540KB,
540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB,
550BB, 550CB, 550DB, 560AB, 640HB, 640JB, 640KB,
....)
Fig. 411
Fig. 412
Fig. 413
Fig. 414
Fig. 414A
Fig. 415
Fig. 416
Fig. 417
Fig. 418
Fig. 419
R 1EFF : 301-399, 1 28-42-43Page A404 1 1 Feb 01/05 1 1 1CES 1 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
FOR FIN 57QT, 63QT
28-42-46-000-001 Removal of the Dualcomp (53QT)
FOR FIN 58QT, 64QT
28-42-48-000-001 Removal of the Ultracomp (52QT)
3. Job Set-up__________
Subtask 28-42-43-941-060
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)
Put the safety barriers in position.
Subtask 28-42-43-865-062
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/FQI/CHAN/1 1QT A13 49VU FUEL/AFT LOW LVL/& OVFL/WING R 44QJ A11 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/FWD LOW LVL/WING/R 45QJ M23 121VU FUEL/FWD LOW LVL/WING/L 46QJ M22 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 R25
R 1EFF : 301-399, 1 28-42-43Page A405 1 1 Feb 01/05 1 1 1CES 1 Subtask 28-42-43-650-055
C. Fuel Configuration
(1)
Defuel the applicable fuel tank (Ref. TASK 28-25-00-650-001).
(2)
Drain the remaining fuel from the applicable fuel tank (Ref. TASK 28-25-00-650-003).
Subtask 28-42-43-010-060
D. Get Access
R (1) Put an adjustable access platform below the applicable zone:
-
FOR 57QT, 63QT
below ZONE 540
-
FOR 58QT, 64QT below ZONE 640. (Ref. Fig. 411/TASK 28-42-43-991-014, 412/TASK 28-42-43-991-015)
(2) Remove the applicable access panels (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-001), (Ref. TASK 57-27-11-000-002):
-
FOR 57QT
remove 540AB, 540BB, 540DB, 540HB, 540NB
-
FOR 58QT
remove 640AB, 640BB, 640DB, 640HB, 640NB
-
FOR 63QT remove 540AB, 540BB, 540EB, 540FB, 540LB, 540MB, 540QB
-
FOR 64QT remove 640AB, 640BB, 640EB, 640FB, 640LB, 640MB, 640PB, 640QB.
R (3) Open access panel 574BB(674BB).
R (4) Open the applicable surge door:
-
FOR 57QT
open 540AZ, 540BZ
-
FOR 58QT
open 640AZ, 640BZ
-
FOR 63QT
open 540BZ
-
FOR 64QT
open 640BZ.
R (5) Install the HOOK-COVER (RIB 2 SURGE DOORS) (98D57004013000) on the applicable surge door.
R 1EFF : 301-399, 1 28-42-43Page A406 1 1 Feb 01/05 1 1 1CES 1
Wing Tank Harness (Group A) - Component Location
Figure 411/TASK 28-42-43-991-014
R 1EFF : 301-399, 1 28-42-43Page A407 1 1 Feb 01/05 1 1 1CES 1
Wing Tank Harness (Group B) - Component Location
Figure 412/TASK 28-42-43-991-015
R 1EFF : 301-399, 1 28-42-43Page A408 1 1 Feb 01/05 1 1 1CES 1
4. Procedure_________
R (Ref. Fig. 411/TASK 28-42-43-991-014, 412/TASK 28-42-43-991-015, 413/TASK 28-42-43-991-016)
R **ON A/C 301-302,
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