Install Fuel Bladder
100185-00
Use the following procedure to install the fuel bladder.
Applicable Aircraft Serial Numbers
00001-00020
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
None
Parts Required
None
Aircraft System and Number
07—Fuel System
Safety Equipment
As Needed
Consumables
LOCTITE® 425™
Task Instructions
1. Ensure that the bladder subassembly is complete and in the following state:
a. Hook and loop fastening installed on bottom surfaces.
b. Fuel level sensor installed.
c. Fuel filler flange with return and supply fittings installed.
d. Low-level optical switch not installed (avoids conflict with the support structure).
2. Install the fuel bladder subassembly into the aircraft fuel bladder support structure.
3. Install the low-level optical switch by first ensuring its O-ring is in good condition (replace with new 3-905 Vitron O-ring if in doubt), then apply LOCTITE® 425™ to its threads and torquing to 12-15 in-lbf.
4. Attach the fuel bladder retention straps to their forward attach studs, torquing the nuts to 44 in-lbf.
5. Connect the vent hose and hose clamp to the barbed fitting on bladder filler flange.
6. Thread the sumping hose through the filler hose, then attach the sumping hose to the barb on the back of the filler neck. Secure the hose with a new.344 15300010 Oetiker clamp and tighten with Ear clamp crimpers.
7. Connect the filler hose to the bladder flange and filler neck and tighten the two hose clamps.
8. Connect the B-nut of the fuel return line to the elbow fitting in the bladder and torque to 110-130 in-lbf with a 11-16 wrench.
9. Connect the fuel supply line B-nut to the elbow fitting in the bladder filler flange finger tight.
10. Mount the P-clamp to the coarse fuel filter, then the clamp to the stud on the bladder flange with a washer and nut, torqued to 21 in-lbf with a 1/4 wrench.
11. Use a 11/16 wrench to torque the fuel supply line B-nut to 110-130 in-lbf.
12. Make the following electrical connections:
a. Connect D9038P to the optical switch.
b. Connect D9039P to the fuel level sensor.
c. With a 7/16 wrench, attach the T9028 ring terminal to the fuel level sensor access plate by temporarily removing one of the level sensor’s attachment bolts and installing the terminal so that it sits on top of the nylon washer. Torque to 40 in-lbsf.
13. Fill the bladder with fuel and check for leaks.
Verification Method
The procedure is complete when the fuel bladder is installed with no leaks.
Parent topic
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