Piper SARATOGA PA-32-301 Maintenance Manual page 297

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
3. Inspect nipple fittings utilizing the fingernail test as follows:
A. Using the fingernail, attempt to scrape the rubber off the nipple fitting. If the rubber has not
degraded. the fingernail will glide across the rudder without damage to the rubber. If an unsatisfactory
condition exists. the fingernail will dig into the rubber.
B. Deteriorated rubber has consistency of either art gum or chewing gum. Usually it will have
changed from a light tan color to a dark reddish-brown or greenish color depending upon the color of fuel
used.
4. Any tank found seeping or with soft nipples should be replaced.
HANDLING AND STORAGE OF FUEL CELLS.
1. The fuel cells should not be removed from the shipping container until the time of installation.
2. Upon removing the fuel cell from the shipping container, inspect the cell for damage due to
crating or removal from crate.
3. Fuel cell nipple fittings are not to be used as handholds. Do not drag fuel cells and stack only in
original shipping containers.
4. Prior to storing used fuel cells, clean with soap and warm water.
5. Fold fuel cells smoothly and loosely with a minimum number of folds. Protective wadding should be
placed between the folds.
6. Store fuel cells in a dry area protected from sunlight. Recommended storage temperature is 70
°
F.
- CAUTION -
Should the temperature be below 70
°
Fmove the cells to a warmer
location.
REPAIR OF FUEL CELLS. (Refer to Chart 2802.)
The following is a repair procedure recommended for field repair of fuel cells constructed of Goodyear
Vithane material. There are two methods by which these repairs may be accomplished. One method is by heat
cure: the other is air cure. The end result of either repair is a neat. permanent repair. The heat repair allows the
cell to be cured and ready for reinstallation in two hours: while the air cure method requires that the cell not be
moved for 72 hours during the air cure period.
- NOTE-
Air cure repairs are to made at a room temperature of
approximately 75° F. For each 10 drop in temperature, add 20
hours cure time. For instance, if the room temperature reads 6 , air
cure for 92 hours instead of 72 hours.
HANDLING OF REPAIR MATERIALS.
I. All materials are to be protected from dirt contamination. sunlight, and excessive heat or cold while
in storage. Containers are to be tightly capped and stored at a temperature of 70
°
F.
2. The repair code 80C27 referred to in this text is prepared immediately prior to use by mixing repair
cement 90C27 (pint can with 320 gms) with cross-linker 80C28 (4 oz. bottle with 81cc).
- CA UTION -
80C27 repair cement requires thorough mixing to obtain full adhesive values.
28-12-09
Page 28-09
2B4
Revised: August
11.
1983
2B4