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Maintenance Tips
Inspection

- Before removing any fuel cell, isolate the areas of possible leaks by opening the inspection plates and tracing the
wetness or staining. Gravity causes fuel to run down the cavity oor, ribs and spars, so the leak may be far away
from where the fuel exits the wing. It may be fuel from overlling in the cavity or the next cell over leaking.
- Check gaskets for tightness and make sure no gasket cement has been used.
- Check all hose clamped connections for tightness, damage, and leaks.
- Check llers, quantity transmitters, tubes and attachments for cracks or leaks.
System Notes Eligibilty Location / Description OEM P/N & Supersedures EFC PMA P/N
Removal
BELL 204
- Read the airframe manual for exact procedures. These are only tips to reduce unnecessary pain and damage. ALL LH 204-062-611-3
- Properly ground the aircraft. When working with fuel, static is your enemy. RH 204-062-611-5
- After draining the fuel, loosening the clamps on the fuel and vent lines and allow the rubber to relax before removal. LH 204-060-685-001
- Remove the ller, transmitters, tubing, fuel strainers, and if practical the drain valve or adapter plate. RH 204-060-685-003
- A hot moist cloth can be applied to soften nipples before removing tubing.
BELL 205 & 205A
- Make sure the wing / fuel cell are thoroughly warm. Temps under 70F cause the rubber to be stiff and hard to remove.
ALL LH REAR 205-060-605-1
- Depending on your climate, you can use the sun to warm the wings and cell before working. RH REAR 205-060-605-3
- Open the inspection panels and undo the ller neck where it attaches to the wing so the cell can be removed. CENTER 205-060-605-5
- Inspect the gaskets for over torquing, elongated holes and gasket cement. LH FLOOR 205-061-632-1
RH FLOOR 205-061-632-2
- Tape the edges of the inspection openings to avoid abrasions and cuts to you and the cell as it is removed. RH FWD 205-062-635-2
- Reach in on the outer surfaces of the cell and undo bayonet clips, snaps, button slides, or lacing cord that hold the cell. LH FWD 205-062-635-9
- Carefully fold and roll the cell into a tube shape to remove it through the opening. RH FWD 205-062-635-11
- Once removed; wipe out any fuel residue, remove clips, cross vent tubes, quick drains, clamps and misc. hardware. FIREWALL 205-062-635-13
- Leave the bolt rings in cell for inspection and testing. BELL 206A, 206A-1 & 206B
- Do not oil the cell. Oiling is for long-term storage after repair. Oiling increases repair cost or makes repair impossible. 4-2566 MAIN 206-061-675-001
- Fold loosely and box in a sturdy carton. If the cell has a strong odor such as auto fuel enclose it in 1-2 plastic bags. 2567&UP MAIN 206-061-661-101

Installation BELL 206L & L1

ALL MAIN 206-062-670-3
LH AUX 206-062-632-1
- Read the airframe manual for exact procedures. These are only tips to reduce unnecessary pain and damage. RH AUX 206-062-632-3
- Properly ground the aircraft. When working with fuel static is your enemy.
- Inspect the cavity for debris, such as metal lings, hardware, tools or rags and clean it thoroughly. BELL 206L3 & 206L4
- Retape rivet heads and sharp edges with cavity tape not duct tape. It is easier to apply tape in 3 - 6 inch pieces. ALL MAIN 206-064-611-001
- You may want to check the venting system for restrictions and damage. LH AUX 206-064-632-005
RH AUX 206-064-632-007
- Attach misc. parts such as the clips and quick drain to cell if necessary.
- Fold and roll the cell into a tube as before and install through the taped opening. BELL 212
- Don’t use excessive force. Work out snags before you tear the cell. Remember that warmth is your friend. ALL LH FLOOR 212-060-600-3E
- Once inside the cavity, unfold the cell, t all corners, and smooth out any wrinkles. RH FLOOR 212-060-600-3G
- Fasten snaps, bayonet clips, button slides, and or lacing cord that support the cell. CENTER 205-060-605-5
- Reconnect all fuel and vent lines. Then reinstall cover plates, transmitters, and llers. LH REAR 205-060-605-11
RH REAR 205-060-605-13
- For gaskets on vertical surfaces, use studs to hold the gasket and maintain clocking.
- General torque values on fuel cells are 30 - 40 inch lbs for 1/4” bolts and 20 - 30 inch lbs for screws. BELL 214
- When tightening clamps, do not over tighten. Overtightening will result in damage or leaks. ALL LH FLOOR 205-062-635-001
- Torque is usually not specied for clamps and compression ttings. The term generally used is “snug”. RH FLOOR 205-062-635-002
- When torquing or tightening, torque or snug then allow the rubber an hour or more to relax then retorque or resnug. CENTER 205-062-635-013
LH UPPER 205-062-635-015
RH UPPER 205-062-635-017
Longevity
BELL 222
- The best thing you can do for your cells is keep them as full whenever possible. ALL AUX 222-366-631-105
CENTER 222-366-677-101
- Aircraft used weekly may keep the tanks less than full but should be topped off when prolonged disuse is expected LH LOWER 222-366-678-101
- Occasionally rocking the wings of parked aircraft will wet the upper half of the cells and help extend their life. RH LOWER 222-366-678-102
- If practical and safe for your aircraft, alternate topping mains and auxiliaries. LH OUTBD 222-366-679-101
- Cessna twin owners should always keep their auxiliaries topped because their mains are generally metal. RH OUTBD 222-366-679-102
- Fuel cells should be stored in a plastic bag and boxed to protect them from ozone, UV, high temperature and humidity.
BELL 412
- Project planes should have the fuel cells worked on and preserved rst so they do not deteriorate beyond repair.
ALL LH FLOOR 412-060-601-101
- Properly preserved fuel cells can be stored for several years before retesting / reoiling with lightweight non detergent oil. RH FLOOR 412-060-601-102
- Preferably do not to use auto fuel. It is not very stable and the high quantity of chemicals in the fuel is harsh on rubber. CENTER 412-060-602-101
- If auto fuel is used, do not let it stand for long periods of time and inspect a rubber fuel system components frequently. LH UPPER 412-060-603-101
RH UPPER 412-060-603-102

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Copyright © 2006 Eagle Fuel Cells-ETC, Inc. All Rights Reserved Copyright © 2006 Eagle Fuel Cells-ETC, Inc. All Rights Reserved