Fuel Cell Compartment; Molded Nipple Fittings; Fuel Cells Handling And Storage - Piper PA-44-180 SEMINOLE Maintenance Manual

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.
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.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— WARNING —
2B3
2 8 - 11 - 0 6
Page 28-07
Revised: May 15, 1989