FUEL - GENERAL - FAULT ISOLATION PROCEDURES
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 TASK 28-00-00-810-801
 Fuel Smell In Cabin
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 1. Possible Causes
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 - a fuel leak found below the cabin floor at the left (right) side of the fuselage frame 36/wing rib 1 intersection
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
ASRM 57-16-00 AMM 21-20-00-010-001 Removal of the Air-Conditioning Distribution Ducts AMM 21-20-00-410-001 Installation of the Air-Conditioning Distribution
 Ducts AMM 21-21-41-000-001 Removal of the Recirculation Filter 4012HM (4013HM) AMM 21-21-41-400-001 Installation of the Recirculation Filter 4012HM
 (4013HM)

R  AMM 28-11-00-280-002 Fuel Tank Leak Checks AMM 53-32-12-000-002 Removal of the Cabin Floor Panels AMM 53-32-12-400-002 Installation of the Cabin Floor Panels SIL 57-086 SIL 57-091
 3. Fault Confirmation
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 A. Inspection/Test
 (1) Do a visual inspection/leak test to locate a possible fuel leak as follows:
 (a) Remove the necessary equipment and furnishing to get access to the cabin floor panels 241HF and 242HF (center passenger compartment).

 (b) Remove the cabin floor panels 241HF and 242HF (located between frames 36 and 42) (Ref. AMM TASK 53-32-12-000-002).

 (c) Remove the applicable air conditioning ducts, from above the wing box center section, in the area adjacent to:

 - the intersection between the left side of the fuselage frame 36 and the left wing rib 1
 「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 ∞∞28-00-00∞∞∞∞∞∞∞∞∞∞Page 201
 Nov 01/00 CES

 - the intersection between the right side of the fuselage frame 36 and the right wing rib 1 (Ref. AMM TASK 21-20-00-010-001).
 (d) Release and carefully pull back the applicable insulation mats/blankets in the area specified in Step (c).

 (e) Examine for indications of a fuel leak at:

 - the intersection between the left side of the fuselage frame 36 (rear face) and the left wing rib 1

 - the intersection between the right side of the fuselage frame 36 (rear face) and the right wing rib 1.

 (f) If necessary, do a leak test in the area around the sealing brackets (Ref. ASRM 57-16-00), Figure 2 (Sheet 1), item 10. Use one of the applicable procedures as follows:

R - Fuel Tank Leak Checks (Ref. AMM TASK 28-11-00-280-002)
 - Fuel Leak Test Source Detection, Helium Method (Ref. SIL 57-091).
 (g) Examine all the insulation mats/blankets:

 - in and adjacent to the leak area specified in Step (c) - on the pressurized panel between the frames 35 and 36.

 (h) Remove and discard any insulation mats/blankets contaminated with fuel.

 4. Fault Isolation
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 A. Procedure
 (1) For a fuel leak found below the cabin floor at the left (right) side of the fuselage frame 36/wing rib 1 intersection, the options available are as follows:
 (a) Ferry Flight
 A ferry flight for the aircraft to return to its main base (without repair) is allowed.
 1 Remove the fuel that has leaked.
_

 2 Clean the work area.
_

 3 The cabin fans must be set to on during the ferry flight.
_

 (b) Temporary Repair
 1 Use fast curing sealant as detailed in SIL 57-086, Part A, to
_
 do a temporary repair.

 「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 ∞∞28-00-00∞∞∞∞∞∞∞∞∞∞Page 202
 Nov 01/00 CES 2 Make an entry in the aircraft technical log to record the

_ temporary repair to this fuel leak.
 NOTE : A temporary repair is limited/valid for 50 flying hours
____ before a final repair has to be carried out.
 (c) Final Repair
 1 Do a final repair as follows:

_ a You must read repair instructions (Ref. SIL 57-086) Part A
_ and Part B before you do the repair.
 b Do the FUEL LEAK REPAIR TECHNICAL SHEET - R571.12107.
_
 2 On completion of the repair:

_

 - replace the two (2) air recirculation filters (4012HM) and (4013HM), (Ref. AMM TASK 21-21-41-000-001) and (Ref. AMM TASK 21-21-41-400-001).
　
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