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(WARNING)
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WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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08/23/21

Message Overview:

Message Name:

FUEL FEED TUBES FUSELAGE LEAKAGE

Identifier: 282OBS008
Effectivity: AIRCRAFT 20501 - 20999
System: Fuel
Associated CAS: None
System Description: 28-21-00
Schematic Diagram: 28-23-00
Wiring Diagram: 28-23-13

Message Description:

Operators noticed fuel draining out at a steady rate from the large mast on the belly of the plane just aft of the wheel wells with the APU running and engines off. After turning off the APU the fuel leak stopped.

Possible Causes:

  • Fuel Supply Line's O-Rings

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Fuel-System Safety Precautions AMM 28-00-00-910-801
Component Location AMM 28-21-00-992-801
Removal of the Engine-Feed Check Valve AMM 28-21-45-000-801
Installation of the Engine-Feed Check Valve AMM 28-21-45-400-801
Removal of the Welded Pipes of the Fuel Line, Part No 1005714071-009 AMM 28-21-47-000-801
Installation of the Welded Pipes of the Fuel Line, Part No 1005714071-009 AMM 28-21-47-400-801
Removal of the Welded Pipes of the Fuel Line, Part No 1005714074-027 AMM 28-21-47-000-802
Installation of the Welded Pipes of the Fuel Line, Part No 1005714074-027 AMM 28-21-47-400-802
Removal of the Welded Pipes of the Fuel Line, Part No 1005714075-013 AMM 28-21-47-000-803
Installation of the Welded Pipes of the Fuel Line, Part No 1005714075-013 AMM 28-21-47-400-803

Troubleshooting Recommendations:

  1. If this occurs and the fittings of the leaking supply line couplings need to be disassembled to replace the o-rings.

fuel_feed_supply_tubesshroud_drainslocationsfuel_o-rings_1fuel_o-rings_2fuel_o-rings_3

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