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### FUEL SYSTEM LIMITATIONS

 

### INTRODUCTION

This section lists the Fuel System Limitations (FSL) that are mandated by the Special Federal Aviation Regulation (SFAR) 88.

FSLs are limitation requirements that identify all the necessary maintenance and inspection instructions to maintain the design features required to preclude the existence or development of an ignition source within the fuel tank system throughout the operational life

of the aircraft.

 

### RULES APPLICABLE TO FUEL SYSTEM LIMITATIONS

A. No person may operate an aircraft unless instructions for maintenance and inspection

of the fuel tank system are incorporated into the operator’s maintenance program.

B. Task intervals are provided in both flight hours and calendar intervals. Tasks are to be

performed at whichever interval occurs first.

 

### PAGE FORMAT DESCRIPTION

The Fuel System Limitations (FSL) are presented in the following format:



## A !<!5 4544;0! 7!8

Task Number Applicability Task Description Interval

A B C D

A. Task Number : Task reference number.

B. Applicability: “All” is for all aircraft. A Mod or Modsum may be listed to identify the

FSL as it applies to the aircraft configuration.

C. Task Description : Brief description of the task to be done.

D. Interval : Calculated limiting interval.	
	
	
	FUEL SYSTEM LIMITATIONS (FSL)Task NumberApplicabilityTask DescriptionIntervalFSL−01AllDetailed Inspection of the Flap Shroud Lightning Strips.6,000 flight hours or 36 monthsFSL−02Standard Fuel TankConfigurationwithModsum8Q101512or 8Q101514Detailed Inspection of the Fuel Tank Bonding Jumpers.18,000 flight hours or 108 monthsLong Range FuelTank ConfigurationwithModsum8Q902090or8Q902091or8Q902177	
	

	
	FUEL SYSTEM LIMITATIONS (FSL)Task NumberApplicabilityTask DescriptionIntervalFSL−02(Cont’d)APU Fuel TankBonding JumperswithModsum8Q902140or8Q902144Detailed Inspection of the Fuel Tank Bonding Jumpers.18,000 flight hours or 108 monthsFSL−03AllFunctional Check of the Flap Shroud Lightning StripsElectrical Bonding.18,000 flight hours or 108 monthsFSL−04AllDetailed Inspection of the Fuel Tank Water Drain ValveDomed Nut.18,000 flight hours or 108 monthsFSL−05AllFunctional Check of the Fuel Tank Water Drain ValveElectrical Bonding.18,000 flight hours or 108 monthsFSL−06AllDetailed Inspection of the Fuel Tank Scavenge andVent Line Wiggins Fittings.18,000 flight hours or 108 monthsFSL−07AllFunctional Check of the Dielectric Properties of the Aluminum Loaded Primer and Enamel on the Wing Skin.18,000 flight hours or 108 monthsFSL−08AllFunctional Check of the Magnetic Dipstick ElectricalBonding.18,000 flight hours or 108 months	
	
	
	FUEL SYSTEM LIMITATIONS (FSL)Task NumberApplicabilityTask DescriptionIntervalFSL−09AllFunctional Check of the Auxiliary Fuel Boost PumpElectrical Bonding.18,000 flight hours or 108 monthsFSL−10AllDetailed Inspection of the Fuel Tank Ladder Plate toAccess Panel Interface and the Ladder Plate Seals.18,000 flight hours or 108 monthsFSL−11AllDetailed Inspection of the Fuel Quantity Gauging Wiring Harness Metal Overall Shield.6,000 flight hours or 36 monthsFSL−12AllFunctional Check of the Fuel Quantity Gauging WiringHarness Metal Overall Shield Electrical Bonding.18,000 flight hours or 108 monthsFSL−13AllFunctional Check of the Fuel Quantity Gauging WiringHarness Aluminum Support Conduit Electrical Isolation.18,000 flight hours or 108 monthsFSL−14Standard Fuel TankConfigurationwithModsum8Q101527Detailed Inspection of the Fuel Tank Fuel QuantityGauging Wiring Harness Outside of the Aluminum Support Conduit.18,000 flight hours or 108 monthsLong Range FuelTank ConfigurationwithModsum8Q902123	
	
	
	FUEL SYSTEM LIMITATIONS (FSL)Task NumberApplicabilityTask DescriptionIntervalFSL−15Standard Fuel TankConfigurationPre Modsum8Q101527Discard the Fuel Tank Fuel Quantity Gauging Wire Harness (without Kynar sleeving)18,000 flight hours or 108 monthsLong Range FuelTank ConfigurationPre Modsum8Q902123FSL−16Standard Fuel TankConfigurationwithModsum8Q101527Discard the Fuel Tank Fuel Quantity Gauging Wire Harness (with Kynar sleeving)72,000 flight hours or 36 yearsLong Range FuelTank ConfigurationwithModsum8Q902123	
	
	
	!!!"#$%Task NumberApplicabilityTask DescriptionIntervalFSL−17Standard Fuel TankConfigurationwithModsums8Q101512and8Q101865or 8Q101514Functional Check of the Fuel Tank Components andthe Plumbing Lines Electrical Bonding.18,000 flight hours or 108 monthsNOTE1Long Range FuelTank ConfigurationwithModsum8Q902090or8Q902091and8Q101865or 8Q902177APU InstallationwithModsum8Q902140or 8Q902144	
	
	
	!!!"#$%Task NumberApplicabilityTask DescriptionIntervalFSL−18withModsums8Q101514or8Q902090Functional Check of the Pressure Relief Valve Electrical Bonding.18,000 flight hours or 108 monthsNOTE1NOTE1: Foraircraft retrofited by modsum, if the FSL task has not already been performed, then this task is to be performed within 6,000flight hours or 36 months whichever occurs first as tracked from the release date of this Temporary Revision. The phase−intime of an Airworthiness Directive (AD) will take precedence over this phase−in time.