Handling And Storage Of Fuel Cells; Removal Of Wing Tip Tanks - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Storage (continued)
3. Handling and Storage of Fuel Cells
(a) To prevent needless damage to fuel cells, exercise the following precautions when handling
cells:
(1.) Fold or collapse cells for storage, transport, or installation into airframe cavities.
(2.) Use protective covers over fitting seal to protect seal surface from contact with cavities
during removal or installation.
(3.) Protect cells from tools, hot lights, etc.
(4.) Avoid stepping on folds or creases.
(5.) Do not carry cells by fittings.
(6.) Maintain original cell contours or folds when refolding.
(7.) When repairing, maintain natural contours of cells, place on well-lit and well-ventilated
surfaces, and prevent contact with sharp edges, comers, and dirty floors.
(8.) Inspect cavities and ensure cleanliness prior to cell installation.
(9.) Do not stack cells.
WARNING: NO SMOKING OR OPEN FLAME IS ALLOWED WHEN REPAIRING
CELLS.
(b) Observe the following rule when storing cells:
(1.) Clean used cells with soap and warm water prior to storage; dry and place in container.
(2.) Fold cells smoothly and lightly as possible with minimum number of folds. Place
protective wadding between folds.
(3.) Wrap cell in moisture-proof paper and place in suitable container. Do not crowd cell in
container. Use wadding to prevent movement.
(4.) Stack boxed cells to allow access to oldest cells first. Do not allow stacks to crush bottom
boxes. Leave cells in boxes until used.
(5.) Storage area must be approximately 70°F and free of exposure to sunlight, dirt, and
damage.
4. Fuel Cell Compartment
(a) Clear cell compartment of all foreign material such as trimmings, loose washers, bolts, or nuts.
(b) Round off any sharp edges in fuel cell compartment.
(c) Inspect fuel cell compartment prior to fuel cell installation.
(d) Tape over all sharp edges and rough rivets.
5. Removal of Wing Tip Tanks (refer to 28-10-00 Figure 401)
(a) Drain tank.
(b) Remove fairing between wing tip and tip tank.
(c) Remove sender unit.
(d) Disconnect electrical wires to navigation lights and strobes.
(e) Disconnect all plumbing from tip tank. Cover ends to prevent fuel contamination.
(f) Support tank, remove six bolts holding tank to the wing and remove tank.
EFFECTIVITY:
040-999
28 10-00
PAGE
3
Jan 10/90