3. Job Set-up
__________ Subtask 28-00-00-941-060
A. Safety Precautions WARNING : OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
_______
(1) You must obey the fuel safety procedures, when you do work in a fuel tank (Ref. TASK 28-10-00-910-001).
(2) Put the safety barriers in position. Subtask 28-00-00-860-063
B. Aircraft Maintenance Configuration
(1)
Defuel the aircraft (Ref. TASK 28-25-00-650-001).
(2)
If necessary, drain the remaining fuel from the applicable fuel tank(s) (Ref. TASK 28-25-00-650-003).
Subtask 28-00-00-010-063-A
C. Get Access
(1) Get access to the applicable fuel tank or work area (Ref. TASK 28-10-00-910-002):
(a)
For the LH and RH wing (Ref. TASK 57-27-11-000-001) and (Ref. TASK 57-27-11-000-002).
(b)
For the center tank (Ref. TASK 57-17-11-000-001).
(c)
Put the adjustable access platform 6-20ft (2-6m) in position.
4. Procedure
_________ Subtask 28-00-00-210-054-A
A. Inspection of the Fuel Tank Bonding
(1) Do the inspection of the fuel tank bonding:
(a) Use a LIGHT SOURCE - SPARK-PROOF to make sure that all the bonding straps are correctly installed.
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(b) Visually examine the bonding straps and make sure that:
-they are not broken
-there are no broken strands
-the outer braid sheaths are not loose in the end crimps
-there is no corrosion.
NOTE : Bonding straps which only show signs of tarnish should be
____ kept in position until the next scheduled in-tank inspection.
(c)
Carefully pull each bonding strap to make sure that the end crimps are correctly attached.
(d)
Make sure that the bonding strap connections are in good
condition.
(e)
Replace all defective bonding straps (Ref. TASK 20-28-00-912-002) and (Ref. TASK 20-28-00-912-006).
(f)
Make sure that the bonding location points are in the correct condition (Ref. TASK 20-28-00-912-003).
(2) Use the bonding strap inspection report sheet to record the condition of each bonding strap. (Ref. Fig. 601/TASK 28-00-00-991-067)
(a)
For the general location of the manhole covers:
(Ref. Fig. 602/TASK 28-00-00-991-068)
(b)
For the general location of the fuel quantity indicator harness and the fuel sensor and probes: (Ref. Fig. 603/TASK 28-00-00-991-069)
(c)
For the general location of the water drain valve and the
magnetic level indicators:
(Ref. Fig. 604/TASK 28-00-00-991-070)
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Bonding Strap Inspection Report Sheet
Figure 601/TASK 28-00-00-991-067
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Manhole Access, Wing Fuel Tanks
Figure 602/TASK 28-00-00-991-068
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Fuel Quantity Indicator Harness, Fuel Sensor and Probe Locations
Figure 603/TASK 28-00-00-991-069
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Water Drain Valve and Magnetic Level Indicator Locations
Figure 604/TASK 28-00-00-991-070
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(d)
For the bonding locations in the wing tanks: (Ref. Fig. 605/TASK 28-00-00-991-017, 606/TASK 28-00-00-991-018, 607/TASK 28-00-00-991-019, 608/TASK 28-00-00-991-020, 609/TASK 28-00-00-991-021, 610/TASK 28-00-00-991-022, 611/TASK 28-00-00-991-023, 612/TASK 28-00-00-991-024, 613/TASK 28-00-00-991-025, 614/TASK 28-00-00-991-026, 615/TASK 28-00-00-991-027, 616/TASK 28-00-00-991-028, 617/TASK 28-00-00-991-029, 618/TASK 28-00-00-991-030, 619/TASK 28-00-00-991-031, 620/TASK 28-00-00-991-032, 621/TASK 28-00-00-991-033, 622/TASK 28-00-00-991-034, 623/TASK 28-00-00-991-035, 624/TASK 28-00-00-991-036, 625/TASK 28-00-00-991-037, 626/TASK 28-00-00-991-038, 627/TASK 28-00-00-991-039, 628/TASK 28-00-00-991-040, 629/TASK 28-00-00-991-041, 630/TASK 28-00-00-991-128, 631/TASK 28-00-00-991-042, 632/TASK 28-00-00-991-043, 633/TASK 28-00-00-991-044, 634/TASK 28-00-00-991-045, 635/TASK 28-00-00-991-046, 636/TASK 28-00-00-991-047, 637/TASK 28-00-00-991-048, 638/TASK 28-00-00-991-049, 639/TASK 28-00-00-991-050, 640/TASK 28-00-00-991-051, 641/TASK 28-00-00-991-052, 642/TASK 28-00-00-991-053, 643/TASK 28-00-00-991-054, 644/TASK 28-00-00-991-055, 645/TASK 28-00-00-991-056, 646/TASK 28-00-00-991-057, 647/TASK 28-00-00-991-058, 648/TASK 28-00-00-991-059, 649/TASK 28-00-00-991-060, 650/TASK 28-00-00-991-061, 651/TASK 28-00-00-991-062, 652/TASK 28-00-00-991-063, 653/TASK 28-00-00-991-064, 654/TASK 28-00-00-991-065, 655/TASK 28-00-00-991-066, 656/TASK 28-00-00-991-129)
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