2.
Install the bolts into the nut rings and torque all bolts to 30 +0 -5 inch-pounds. wait 30 minutes and retorque to 25 ± 5 inch-pounds.
3.
Noting the position of the sender, place sender with its gasket into cell and install bolts, connect the wires to the sender.
4.
Reaching through the access panel at the bottom rear nacelle connect the clamp to the finger strainer and torque to 15 inch-pounds.
5.
Reaching through the side access panel connect the fitting at the vent line and tighten the clamps to 15 inch-pounds.
6.
Service cell and visually inspect all fittings for leaks.
7.
Replace the access covers to the top and side of the nacelle and also at the underside of the wing at the nacelle.
CLEANING AND INSPECTION OF FUEL CELLS.
1. Fuel cells may be cleaned by the following procedure:
A. New Cells: It should not be necessary to clean new cells upon removing them from their containers. if they are installed in the airframe cavities promptly. If for any reason the cells are not installed immediately, and become dirty, they should be cleaned with soap and warm water to remove foreign material prior to installation in a clean cavity.
— WARNING —
USE A VAPOR PROOF LIGHT FOR INSPECTION.
28-10-00 Page 28-12 Issued: April 1, 1997
Figure 28-2. Fuel Cell Installation
28-10-00
Page 28-13
Issued: April 1, 1997
2E5
B. Used Cells: Prior to removal, the cells are to be drained of fuel, purged with fresh air and swabbed out to remove all traces of fuel. Following removal, the cells are to be cleaned inside and out with soap and warm water.
2. Fuel cells may be inspected by the following procedure:
A. New Cells: Inspect the cell surface inside and outside for cuts, abraded (scuffed) areas and accessory damage. Also, inspect the fitting seals for nicks, scratches and foreign material.
B. Used Cells: Cells removed from the airframe cavity for inspecting and repair or cells being returned to service from storage, should be inspected as outlined above.
Cells installed in the airframe cavity may be inspected for possible repairs by reaching through the fuel cell access plate and taking a section of cell between the thumb and forefinger.. Wipe the ridge created by this action with MEK. If fine cracks are evident, the fuel cell is not repairable.
FUEL CELL COMPARTMENT.
1.
Thoroughly clear the cell compartment of all fittings, trimmings, loose washers, bolts or nuts.
2.
Round off all sharp edges of the fuel cell compartment.
3.
Inspect the fuel cell compartment just prior to fuel cell installation.
4.
Tape over all sharp edges and all rough rivets.
MOLDED NIPPLE FITTINGS.
The molded nipple fitting is a lightweight fitting developed for ease in installation in certain locations in the airplane. In order to get the best service from this type fitting, it is necessary to exercise certain precautions at the time of installation. The specific precautions other than the general care in handling are as follows:
1.
Insert the finger strainer into the fuel cell 4.50 inches.
2.
Insert the vent tube into the fitting.
3.
The hose clamp must be clear of the end of the fitting by 1/4 inch where possible.
4.
Locate the hose clamp on the fabric-reinforced area of the nipple.
5.
Torque the hose clamp 15 to 20 inch-pounds. Do this once. Do not re-tighten unless the hose clamp is loosened completely and allowed to set for 15 minutes before re-tightening.
6.
Do not use sealing paste or gasket compound.
7.
Apply a thin film of Simonize Wax to metal flow tubes to facilitate installation and removal.
HANDLING AND STORAGE OF FUEL CELLS.
— WARNING —
DO NOT PERMIT SMOKING OR OPEN FLAME NEAR REPAIR AREA OR CELLS.
1. Prevent needless damage by exercising common sense care in all handling of the cells. Folding or collapsing of cells is necessary to place them in containers for storage, install in airframe cavities and carrying from place to place. Protect fitting seal surface from contact with cavities during removal or installation. Use protective covers over fitting seal when practical. Protect cell from tools, hot lights, etc., when working around them. Avoid stepping on folds or creases in cells. Do not carry cells by fittings. Maintain original cell contours or folds when refolding for boxing, rolling to insert in airframe cavities or handling in the repair area.
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