R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 28-11-00-941-081
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1)
If you want to test the RIB22 you must do the Leak Test with Fuel of the Wing-Tank Outer and Inner Cells (Ref. TASK 28-11-00-790-002).
(2)
You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(3)
Put the safety barriers in position.
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Subtask 28-11-00-865-077
B. 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
**ON A/C 301-399,
121VU FUEL/CTR TK/L&R XFR/CTL & IND 2QL R26
121VU FUEL/CTR TK/L&R XFR/CTL & IND 1QL R25
**ON A/C ALL
123VU L WING TK/PUMP 1/STBY SPLY 11QA AD12
123VU R WING TK/PUMP 1/STBY SPLY 12QA AE12
Subtask 28-11-00-860-062
C. Aircraft Maintenance Configuration
(1)
Put the adjustable access platform in position below the LH(RH) wing vent/surge tank.
(2)
Put the container below the LH(RH) vent surge tank NACA vent.
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(3)
The applicable vent surge tank must be full of fuel for a minimum 30 minutes before the test.
(4)
Refuel the applicable wing tank fully and keep the fuel tanker connected to the aircraft (Ref. TASK 12-11-28-650-003).
(5)
For the left wing surge tank only, refuel the center tank fully. Keep the fuel tanker connected to the aircraft (Ref. TASK 12-11-28-650-003).
(6)
On panel 800VU, put the MODE SELECT switch to REFUEL.
(7)
On panel 800VU, put the applicable REFUEL VALVES switches to OPEN.
(8)
On panel 800VU, put and hold the TEST switch at HI.LVL, see that the applicable HI.LVL. light (blue) goes out.
(9)
Set the fuel tanker to its lowest flow-rate and pressure. When fuel flows from the NACA vent intake, release the TEST switch. Put the applicable wing tank REFUEL VALVES switch on panel 800VU to SHUT.
(10)
Stop the operation of the fuel tanker and disconnect it.
(11)
On panel 800VU, put the MODE SELECT switch to OFF.
(12) Clean all fuel from the external surface of the vent surge tank. Subtask 28-11-00-010-073
D. Get Access
(1)
Remove the applicable access panels (Ref. TASK 57-27-11-000-002):
-
for the left wing 560AB
-
for the right wing 660AB.
(2)
Remove the applicable leading-edge access-panels:
-
for the left wing 522PB, 522RB, 522TB
-
for the right wing 622PB, 622RB, 622TB.
(3)
Remove the applicable trailing-edge access-panels:
-
for the left wing 575JB, 575KB, 575LB, 575MB
-
for the right wing 675JB, 675KB, 675LB, 675MB.
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4. Procedure
_________ Subtask 28-11-00-790-056
A. Leak Test on the Wing Vent/Surge Tanks - With Fuel
(1)
Visual Inspection
(a) Look for signs of fuel leakage in these areas:
-tank seals and sealant
-structure, brackets and clamps
-fuel pipelines, couplings, bonded items, brackets and clamps.
(2)
Talcum Powder Procedure WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
CAUTION : USE THE TALCUM POWDER PROCEDURE ONLY ON THE EXTERNAL
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