Piper PA-32R-301T SARATOGA S, Maintenance Manual

Page: 350 / 956

FUEL STORAGE (Cont.)
M. Testing Fuel Cells (cont.)
(2) Chemical Test:
– NOTE –
The chemical test is the more sensitive and preferred test.
(a) Attach a test plate to all fitting openings except one.
(b) Make up a Phenolphthalein solution as follows:
1 Add 40 grams Phenolphthalein crystals in 1/2 gallon of Ethyl Alcohol and mix, then;
2 Add 1/2 gallon of water.
(3) Pour ammonia on an absorbent cloth in the ratio of 3 ml per cubic foot of cell capacity. Place
ammonia saturated cloth inside the cell.
(4) Install remaining test plate to opening used to insert ammonia saturated cloth.
(5) Inflate cell with air to a pressure of 1/4 psi
maximum
. Cap and maintain pressure for fifteen
minutes.
(6) Soak a large white cloth in phenolphthalein solution. Wring it out thoroughly. Spread cloth
smoothly on outer surface of cell. Press cloth down to insure detection of minute leaks.
(7) Check cloth for red spots, which indicate a leak. Mark any leaks found and move cloth to a
new location. Repeat procedure until entire exterior surface of cell has been covered. Red
spots appearing on cloth may be removed by resoaking cloth in phenolphthalein solution.
(8) Phenolphthalein solution and test cloth are satisfactory only as long as they remain clean.
Any phenolphthalein solution that is not in immediate use should be stored in a closed rust
proof container to prevent evaporation and deterioration.
(9) After test, remove all plates and test equipment. Allow cell to air out.
(3) In conducting either test outlined above, the cell need not be confined by a cage or jig, providing
the 1/4 psi pressure is not exceeded.
N. Outboard Fuel Cell Installation (Refer to Figure 4, page 28-9, grid 2D16.)
(1) Inspect cell compartment as explained in the paragraph F, “Fuel Cell Compartment”.
(2) Do not use sharp tools such as screwdrivers, files, etc. for installation purposes.
(3) Roll cell into a shape and size which can be inserted through access opening of the cell
compartment.
(4) Place cell within cell compartment. Unroll and establish correct relationship of cell to compartment.
(5) Secure cell by pressing velcro strips of fuel cell against velcro strips of cell compartment.
(6) Using appropriate access opening in bottom of wing, install fuel sender unit as shown in Figure 4,
View “A”.
(7) Reaching into fuel cell, place fuel vent valve assembly in place in fuel cell vent nipple. Secure
with clamp installed through appropriate access opening in bottom of wing. Torque clamp 12-16
inch - pounds.
(8) Insert fuel vent line one inch into fuel cell vent nipple and secure with clamp. Torque clamp 12-16
inch - pounds.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
28-10-00
Page 28-16
Reissued: July 1, 1993
2E5