- (Ref. AMM TASK 28-11-00-790-003)
- (Ref. AMM TASK 28-11-00-790-005)
- (Ref. AMM TASK 28-11-00-790-007)
- (Ref. AMM TASK 28-11-00-790-009).
NOTE : The cause of fuel leaks are:
____
- damage to the structure
- damaged or loose fasteners
- incorrect installion of components
- damaged seals, o-rings or sealant.
(3) If a fuel leak is found obey the instructions (Ref. AMM TASK 28-11-00-280-002) and go to Para. 4.A. if/when applicable.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-11-00∞∞∞∞∞∞∞∞∞∞Page 202
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R **ON A/C ALL
4. Fault Isolation
_______________
A. Procedure
(1) Repair all the leaks:
(a) In the tanks (Ref. AMM TASK 28-11-00-280-002):
- Local Repair of Fuel Tank Sealant (Ref. AMM TASK 51-76-12-300-001)
- Repair of Fuel Tank Fillet (Ref. AMM TASK 51-76-12-300-002)
- Temporary External Repair of the Fuel Tank (Ref. AMM TASK 51-76-12-300-003)
- Detailed Fuel Tank Repair Data (Ref. SIL 57-86).
(b) In the fuel pipes:
- Replace or repair (Ref. Fuel Pipe Repair Manual - FPRM).
(c) In the fuel related LRU(s):
- Replace (Ref. Removal and Installation (R & I) Procedures).
(2) When the fuel leak repair is complete, do the procedures that follow:
(a) Do a Visual Inspection of the Vapour Seal (Ref. AMM TASK 28-13-42-200-001).
(b) Check the Drain Mast Outlet for Obstruction (Ref. AMM TASK 28-13-00-200-001).
1_ If necessary, repair (Ref. AMM TASK 28-13-42-300-001) or
replace the vapour seal (Ref. AMM TASK 28-13-42-000-001) and
(Ref. AMM TASK 28-13-42-400-001).
1 If necessary, remove the blockage or replace the drain mast
_ (Ref. AMM TASK 28-13-43-000-001) and (Ref. AMM TASK 28-13-43-400-001).
(c) Do the Functional Test of the Center Box/Tank Vapour Seal and Vent/Drain System (Ref. AMM TASK 28-13-00-700-001).
(d) Refuel, to full (high level cut off) the applicable/repaired tank(s) (Ref. AMM TASK 12-11-28-650-003).
(e) Do a check of the Fuel Leak Monitor 500QM for evidence of fuel leakage (Ref. AMM TASK 28-11-00-200-002).
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R **ON A/C 106-149, 229-299, 401-499,
R TASK 28-11-00-810-805
R Fuel - Leak Detection Warning Shown
R WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
R 1. Possible Causes
_______________
R - a difference between the actual fuel (FOB) used and a calculated value of R the the fuel used
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 28-11-00-810-806 Fuel - A Leak is Shown by Discrepancies in the Fuel R On Board (FOB) and Fuel Used (FU) Calculations During R Flight
R 3. Fault Confirmation
__________________
R A. General R R At the first engine start, the FQIC will record (log) the initial total R fuel quantity onboard. R R During flight, or until the second engine shutdown, the FWC monitors the R signals that follow: R - initial FOB (from the FQIC) R - actual (current) FOB (from the FQIC) R - engine 1 fuel used - from the fuel flow transmitter on ENG 1 R - engine 2 fuel used - from the fuel flow transmitter on ENG 2 R - fuel leak threshold - from FQIC. R R At the FWC, the actual FOB, the engine 1 fuel used, and the engine 2 fuel R used are added together. R R The result of the addition is subtracted from initial FOB. R R If there is a difference between these two values, more than the R threshold value, and the appropriate conditions exist, the FWC gives an R indication of a possible fuel leak. R This is a single chime warning with the ECAM alert: R FUEL - F.USED/FOB DISAGREE. R
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R The threshold value is calculated by the FQIC.
R The FQIC transmits (to the FWC) a threshold value based on the initial
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