WORKSHEET FOR FUEL SYSTEM MODIFICATION – J400 / J430

Aircraft Registration: G- 

Background

This worksheet covers the installation of a fuel system modification for the Jabiru J400 / J430 series of aircraft. This aircraft carries fuel within 2 wing mounted fuel tanks which originally were connected to the engine via dual Gascolators, a dual fuel tap, pumps and filters. It was found however, that under certain conditions of low fuel and if the aircraft was flown slightly out of balance, that it was possible to create a situation leading to partial fuel starvation when the engine was being fed by a single tank. Jabiru have subsequently designed and engineered an alternative system, which uses an intermediate ‘header’ tank, installed under the P2 seat and which acts as an intermediate buffer and Gascolator. 

Jabiru are now supplying new aircraft kits with this new type of system. It is recommended that kits not supplied with this header tank should be modified to include this tank in the fuel system. However, because these aircraft use a ‘shark’s fin’ type of fuel system venting, the fuel system schematic diagram will be slightly different for these systems. Kits supplied with the new header tank will be provided with a different type of fuel cap with integral vents. 

It is possible to fit a float switch to the header tank which could provide a warning of imminent fuel feed failure by means of an instrument panel mounted indicator. 

Documentation

1.       Jabiru J400 build manual sub procedure 37.

2.       Jabiru Service Bulletin JSL 001-1c dated 07 December 2004 

Works Completed as part of this worksheet

Installation of fuel system header tank, associated fuel and fuel venting pipework, fittings, float switch and associated wiring, all in accordance with documents detailed above and good engineering practice. Modifications to fuel tap and fuel system venting arrangement. 

Final Inspection

p     Fuel system modifications installed as per installation instructions detailed above.

p     All hose clamps, fittings and connections checked for security and tightness.

p     Inspection for any leakages or crimped hoses.

p     Security of installation of header tank, including lateral supports.

p     Tank free of chafing against surrounding compartment

p     Float switch wiring secure

p     All fuel line and vent connections as per appropriate diagram in JSL 001-1c.

p     Check all fuel and vent lines are not chafing against structure of aircraft or other items.

p     Fuel tap spare inlet appropriately blanked off (upgraded aircraft only)

I have inspected this aircraft in accordance with the above worksheet and confirm that it is ready for test flight with respect to the fuel system modification.